Article
Chemistry, Multidisciplinary
Taewoo Ko, Samir Kumar, Sanghoon Shin, Dongmin Seo, Sungkyu Seo
Summary: In this study, a novel approach to pattern quantum dot (QD) nanopatterns by electron beam lithography was presented. Colloidal QDs were used without additional modifications, and reliable dot and line patterns with dimensions as small as 140 nm were successfully generated. Additionally, it was shown that using a SiO2 spacer layer on a Au substrate can significantly enhance the fluorescence intensity of QDs.
Article
Nanoscience & Nanotechnology
Lei Zheng, Urs Zywietz, Tobias Birr, Martin Duderstadt, Ludger Overmeyer, Bernhard Roth, Carsten Reinhardt
Summary: The study demonstrates a simple and low-cost method for rapid generation of high-resolution and accurate optical micro- and nanostructures using UV-LED projection photolithography. The developed system allows for the preparation of photonic devices with various geometrical complexities and dimensions from nanometers to centimeters.
MICROSYSTEMS & NANOENGINEERING
(2021)
Article
Nanoscience & Nanotechnology
Yijie Liu, Xuexuan Li, Ben Pei, Lin Ge, Zhuo Xiong, Zhen Zhang
Summary: Scanning probe lithography is a promising technology for nanoscale fabrication. This study proposes a novel framework for optimizing process parameters and segmenting features using machine learning. By extracting reliable information for statistical analysis, the framework enables the optimization of process parameters for smaller critical dimensions and large-scale nano-lithography.
MICROSYSTEMS & NANOENGINEERING
(2023)
Article
Multidisciplinary Sciences
Run-Ze Liu, Yu-Kun Qiao, Han-Sen Zhong, Zhen-Xuan Ge, Hui Wang, Tung-Hsun Chung, Chao-Yang Lu, Yong-Heng Huo, Jian-Wei Pan
Summary: Semiconductor quantum dots have demonstrated deterministic photon pair generation with high polarization entanglement fidelity for quantum information applications. However, the limited photon indistinguishability due to temporal correlation hinders their scalability to multi-photon experiments. In this study, by utilizing quantum interferences to decouple polarization entanglement from temporal correlation, the entanglement fidelity of four-photon Greenberger-Horne-Zeilinger (GHZ) state is improved. This work paves the way for realizing scalable and high-quality multi-photon states from quantum dots.
Article
Chemistry, Multidisciplinary
Quanbo Jiang, Prithu Roy, Jean-Benoit Claude, Jerome Wenger
Summary: In this research, plasmonic nanoantennas were used to trap single colloidal quantum dots and enhance their photoluminescence without the need for further processing, achieving precise positioning of the quantum emitter at the nanoantenna hotspot. The dedicated nanoantenna design exhibited high trap stiffness for quantum dot trapping and relatively low trapping power, resulting in significantly improved emission characteristics of the single quantum dot.
Article
Nanoscience & Nanotechnology
Anshuman Cherala, Parth N. Pandya, Kenneth M. Liechti, S. V. Sreenivasan
Summary: Emerging nanoscale applications in energy, electronics, optics, and medicine can benefit from incorporating nanoshaped structures with sharp corners. By utilizing nanoimprint lithography followed by metal-assisted chemical etching, diamond-like nanoshapes have been shown to improve device performance. Studies suggest that scaling nanoshaped imprinting down to sub-10 nm levels is achievable with improved resist materials and novel bridge structures.
MICROSYSTEMS & NANOENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Qing Sun, Christian Dolle, Chantal Kurpiers, Kristian Kraft, Monsur Islam, Ruth Schwaiger, Peter Gumbsch, Yolita M. M. Eggeler
Summary: This study presents a novel in situ electron microscopy approach for investigating the shrinkage dynamics of 3D-printed nanoarchitectures during isothermal pyrolysis. The results reveal significant changes in the kinetic parameters and morphological textures of the 3D objects under different temperatures and atmospheric conditions. Understanding and controlling pyrolysis in 3D structures enables precise modification of shrinkage, creation of tensegrity structures, and promotes development of pyrolytic carbon with custom architectures and properties.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Denis Yagodkin, Kyrylo Greben, Alberto Eljarrat Ascunce, Sviatoslav Kovalchuk, Mahdi Ghorbani-Asl, Mitisha Jain, Silvan Kretschmer, Nikolai Severin, Juergen P. Rabe, Arkady Krasheninnikov, Christoph T. Koch, Kirill Bolotin
Summary: A new localized excitonic state is demonstrated in patterned monolayer 2D semiconductors. The state is distinguished by non-linear power dependence and can survive up to room temperature. It is shown to be of extrinsic origin, likely associated with charge transfer excitons from the organic substance deposited onto the 2D semiconductor.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Bo Xiong, Jia-Nan Wang, Ru-Wen Peng, Hao Jing, Ren-Hao Fan, Dong-Xiang Qi, Fei Chen, Mu Wang
Summary: The newly designed microlens combines the design strategies of metalens and traditional microlens, achieving a high-efficient broadband, polarization-independent, and achromatic microlens.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Shi Guo, Savvas Germanis, Takashi Taniguchi, Kenji Watanabe, Freddie Withers, Isaac J. Luxmoore
Summary: In this work, a device geometry consisting of gold pillars embedded in a van der Waals heterostructure is presented. The gold pillars generate strain and inject charge carriers, enabling positional control and electrical pumping of a single photon emitter. Increasing the thickness of the hexagonal boron nitride tunnel barriers restrict electroluminescence but enable electrical control of the emission energy of the site-controlled single photon emitters, with measured energy shifts reaching 40 meV.
Article
Physics, Multidisciplinary
P. Scarlino, J. H. Ungerer, D. J. van Woerkom, M. Mancini, P. Stano, C. Mueller, A. J. Landig, J. Koski, C. Reichl, W. Wegscheider, T. Ihn, K. Ensslin, A. Wallraff
Summary: This study investigates the use of semiconductor quantum dots, where electrons or holes are isolated via electrostatic potentials generated by surface gates, in semiconductor quantum technology. By capacitively coupling double-quantum-dot (DQD) charge qubits to high-impedance superconducting quantum interference device array and Josephson-junction array resonators, the researchers were able to tune the interactions between the qubit and the resonator using surface gates. The results show that the qubit-resonator coupling strength, qubit decoherence, and detuning noise affecting the charge qubit are all systematically tunable.
Article
Chemistry, Multidisciplinary
Sascha Kolatschek, Cornelius Nawrath, Stephanie Bauer, Jiasheng Huang, Julius Fischer, Robert Sittig, Michael Jetter, Simone Luca Portalupi, Peter Michler
Summary: The combination of semiconductor quantum dots with photonic cavities has shown promising results in achieving nonclassical light sources with high brightness, indistinguishability, and repetition rate. By coupling InGaAs/GaAs QDs to a circular Bragg grating cavity, enhancements in geometric extraction efficiency and brightness have been demonstrated under different excitation conditions. Through p-shell pumping, high count rates with pure single-photon emission have been achieved, along with good single-photon purity at temperatures of up to 77 K.
Article
Chemistry, Multidisciplinary
Eva De Leo, Aurelio A. Rossinelli, Patricia Marques-Gallego, Lisa V. Poulikakos, David J. Norris, Ferry Prins
Summary: Linear gratings patterned on the surface of cQD thin films enhance the outcoupling of emission, resulting in bright and saturated colors. By adjusting the periodicity and orientation of the gratings, active color tuning of the thin-film emission is achieved.
Article
Optics
M. V. Rakhlin, A. I. Galimov, I. V. Dyakonov, N. N. Skryabin, G. V. Klimko, M. M. Kulagina, Yu. M. Zadiranov, S. V. Sorokin, I. V. Sedova, Yu. A. Guseva, D. S. Berezina, Yu. M. Serov, N. A. Maleev, A. G. Kuzmenkov, S. I. Troshkov, K. V. Taratorin, A. K. Skalkin, S. S. Straupe, S. P. Kulik, T. V. Shubina, A. A. Toropov
Summary: The characteristics of a single-photon emitter based on a semiconductor quantum dot depend on the stability of the recombination channel. A study shows that dominant recombination through neutral exciton states can be achieved by controlling the doping profile near the quantum dot. Experimental results demonstrate high indistinguishability and brightness of successively emitted single photons, enabling spatio-temporal demultiplexing of photons in six independent spatial modes.
JOURNAL OF LUMINESCENCE
(2023)
Article
Chemistry, Multidisciplinary
Hoduk Cho, Ivan A. Moreno-Hernandez, Vida Jamali, Myoung Hwan Oh, A. Paul Alivisatos
Summary: The study uses liquid-phase transmission electron microscopy and electron beam lithography to investigate interactions between nanorods in a predefined potential energy landscape. By changing starting spatial arrangements, the self-assembly behavior of nanorods following lift-off can be tuned.
Article
Physics, Applied
Timm Gao, Lucas Rickert, Felix Urban, Jan Grosse, Nicole Srocka, Sven Rodt, Anna Musial, Kinga Zolnacz, Pawel Mergo, Kamil Dybka, Waclaw Urbanczyk, Grzegorz Sex, Sven Burger, Stephan Reitzenstein, Tobias Heindel
Summary: Deterministic solid state quantum light sources are crucial for future communication networks. This study presents a compact quantum dot single-photon source operating at telecom wavelengths, which achieves high efficiency and key rate in quantum key distribution experiments.
APPLIED PHYSICS REVIEWS
(2022)
Article
Optics
Moritz Pfluger, Daniel Brunner, Tobias Heuser, James A. Lott, Stephan Reitzenstein, Ingo Fischer
Summary: In this article, we demonstrate the construction of the largest network of optically coupled semiconductor lasers reported so far by using diffractive optics in an external cavity to couple vertical-cavity surface-emitting lasers (VCSELs). We successfully align and lock 22 out of 25 lasers to an external drive laser, and show significant interaction between the lasers of the array. Our VCSEL network, with its high homogeneity, strong interaction, and scalability, serves as a promising platform for experimental investigations of complex systems and has direct applications as a photonic neural network.
Article
Nanoscience & Nanotechnology
Timm Gao, Martin von Helversen, Carlos Anton-Solanas, Christian Schneider, Tobias Heindel
Summary: Currently, quantum communication relies on attenuated lasers for secret key generation. However, in future quantum networks, deterministic quantum light sources are needed to overcome limitations from probabilistic photon distribution. Transition metal dichalcogenides (TMDCs) show potential as emitters for quantum light generation, and we demonstrate their practicality in quantum communication by using a TMDC single-photon source in a quantum key distribution (QKD) setup. Our results show performance comparable to QKD experiments using semiconductor quantum dots or color centers in diamond, and pave the way for wider applications of quantum information technologies using TMDC single-photon sources.
NPJ 2D MATERIALS AND APPLICATIONS
(2023)
Article
Physics, Applied
Ching-Wen Shih, Imad Limame, Sebastian Krueger, Chirag C. Palekar, Aris Koulas-Simos, Daniel Brunner, Stephan Reitzenstein
Summary: In this study, optically pumped micropillar lasers with low-absorbing Al0.2Ga0.8As/Al0.9Ga0.1As dielectric Bragg reflectors were designed and characterized. The incorporation of 20% Al content in the DBRs significantly improved the pump efficiency by creating an optical pumping window from 700 to 820 nm. Experimental observations also showed that pump laser wavelengths outside of the specific range resulted in reduced pump efficiency.
APPLIED PHYSICS LETTERS
(2023)
Article
Optics
Lucas Rickert, Fridtjof Betz, Matthias Plock, Sven Burger, Tobias Heindel
Summary: This paper presents a numerical investigation of directly fiber-coupled hybrid circular Bragg gratings (CBGs) featuring electrical control for operation in the application relevant wavelength regimes. The proposed high-performance designs combine hybrid CBGs with a dielectric planarization and a transparent contact material, enabling high direct fiber coupling efficiency and exhibiting Purcell factors. The identified designs can sustain expected fiber efficiencies and average Purcell factors assuming conservative fabrication accuracies, and electrical field strengths suitable for Stark-tuning of an embedded quantum dot can be reached.
Article
Nanoscience & Nanotechnology
Daniel Wigger, Johannes Schall, Marielle Deconinck, Nikolai Bart, Pawel Mrowinski, Mateusz Krzykowski, Krzysztof Gawarecki, Martin von Helversen, Ronny Schmidt, Lucas Bremer, Frederik Bopp, Dirk Reuter, Andreas D. Wieck, Sven Rodt, Julien Renard, Gilles Nogues, Arne Ludwig, Pawel Machnikowski, Jonathan J. Finley, Stephan Reitzenstein, Jacek Kasprzak
Summary: Semiconductor quantum dot molecules are versatile in their tunability of optical properties and their ability to cover different energy scales associated with charge and spin physics, making them promising for quantum technological applications. This study demonstrates the coherent control of interdot tunnel-coupling in these systems, focusing on the quantum coherence of optically active trion transitions. By using ultrafast four-wave mixing spectroscopy, a quantum coherence is generated in one trion complex and transferred and probed in another trion configuration, with theoretical modeling providing an explanation of the underlying coupling mechanism and dynamic processes.
Article
Physics, Applied
Chirag Chandrakant Palekar, Manan Shah, Stephan Reitzenstein, Arash Rahimi-Iman
Summary: This study reports the design, nanofabrication, and characterization of high-quality polymer-based micromirror structures using the 3D two-photon polymerization lithography technique. The innovative concept provides microstructures for fast prototyping and offers cost-effective and environmentally sensitive polymer-based mirrors compatible with a wide range of wavelengths. The research demonstrates reproducible and mechanically stable 3D printed micromirrors that enable hybrid nanophotonic devices based on quantum dots, molecules, or 2D quantum materials.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Michael Seidel, Yuhui Yang, Thorsten Schumacher, Yongheng Huo, Saimon Filipe Covre da Silva, Sven Rodt, Armando Rastelli, Stephan Reitzenstein, Markus Lippitz
Summary: Reliable single-photon sources, high coupling efficiency, and low propagation losses are key requirements for quantum plasmonic nanocircuits. The best overall performance of these nanocircuits is achieved by adding a spacer layer between the quantum dot and the plasmonic waveguide, resulting in an improved coupling efficiency through standing wave interference.
Article
Optics
Zaijun Chen, Alexander Sludds, Ronald Davis III, Ian Christen, Liane Bernstein, Lamia Ateshian, Tobias Heuser, Niels Heermeier, James A. Lott, Stephan Reitzenstein, Ryan Hamerly, Dirk Englund
Summary: Researchers demonstrate an optical computing architecture using micrometre-scale VCSEL transmitter arrays, achieving an energy efficiency of 7 fJ per operation and a compute density of 6 tera-operations mm(-2) s(-1). This system overcomes the challenges of ONNs, such as high energy consumption, low compute density, and long latency, providing a new way to accelerate machine learning tasks.
Article
Physics, Multidisciplinary
Yanqiang Guo, Jianfei Zhang, Xiaomin Guo, Stephan Reitzenstein, Liantuan Xiao
Summary: The emission characteristics of quantum-dot micropillar lasers (QDMLs) lie at the intersection of nanophotonics and nonlinear dynamics, providing an ideal platform for studying the optical interface between classical and quantum systems. In this research, a noise-induced bimodal QDML with orthogonal dual-mode outputs is modeled, and the nonlinear dynamics, stochastic mode jumping, and quantum statistics are investigated. The results show that noise-induced effects lead to the emergence of two intensity bifurcation points for the strong and weak modes, and the maximum output power of the strong mode increases with the noise intensity. The anti-correlation of the two modes reaches its maximum at the second intensity bifurcation point. The dual-mode stochastic jumping frequency and effective bandwidth can exceed 100 GHz and 30 GHz under the noise-induced effect. Photon bunching (g((2))(0) > 1) of both modes is observed over a wide range of noise intensities and injection currents. The photon number distribution of the strong or weak mode becomes a mixture of Bose-Einstein and Poisson distributions, with the proportion of the Poisson distribution increasing in the high injection current region for the strong mode and decreasing for the weak mode.
NEW JOURNAL OF PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Maciej Jaworski, Aleksandra Chudzynska, Pawel Mrowinski, Joanna Prazmowska-Czajka, Wojciech Kijaszek, Jan Grosse, Sven Rodt, Stephan Reitzenstein, Grzegorz Sek
Summary: This study proposes the xenon-plasma FIB technology as an alternative solution for the fabrication of photonic microstructures. By optimizing the processing method, GaAs-based photonic microstructures with InGaAs QDs emitting bright light were successfully fabricated.
OPTICAL MATERIALS EXPRESS
(2023)
Article
Materials Science, Multidisciplinary
Martin von Helversen, Lara Greten, Imad Limame, Ching-Wen Shih, Paul Schlaugat, Carlos Anton-Solanas, Christian Schneider, Barbara Rosa, Andreas Knorr, Stephan Reitzenstein
Summary: This study explores the emission properties of quantum emitters in a WSe2 monolayer induced by metallic nanoparticles, and verifies their single-photon purity. The temperature-dependent coherence time and decay time are determined through Michelson interferometry and time-resolved photoluminescence experiments.
Article
Chemistry, Multidisciplinary
Frederico B. Sousa, Raul Perea-Causin, Sean Hartmann, Lucas Lafeta, Barbara Rosa, Samuel Brem, Chirag Palekar, Stephan Reitzenstein, Achim Hartschuh, Ermin Malic, Leandro M. Malard
Summary: The transition metal dichalcogenide family of semiconducting two-dimensional materials has shown great potential in studying the exciton Mott transition. Pulsed laser excitation at high pump fluences can induce the transition to an electron-hole plasma in these materials, leading to a broadband light emission. Correlation measurements reveal the dynamics of electronic cooling, providing insights for further studies and applications in nanolasers and optoelectronic devices.
Article
Materials Science, Multidisciplinary
Frederik Bopp, Johannes Schall, Nikolai Bart, Florian Voegl, Charlotte Cullip, Friedrich Sbresny, Katarina Boos, Christopher Thalacker, Michelle Lienhart, Sven Rodt, Dirk Reuter, Arne Ludwig, Andreas D. Wieck, Stephan Reitzenstein, Kai Mueller, Jonathan J. Finley
Summary: Quantum dot molecules (QDMs) are capable of generating one-and two-dimensional photonic graph states deterministically. In this study, power-dependent Rabi oscillations of direct excitons, spatially indirect excitons, and excitons with a hybridized electron wave function are demonstrated. An off-resonant detection technique based on phonon-mediated state transfer allows for spectrally filtered detection under resonant excitation. The application of a gate voltage to the QDM device enables continuous transition between direct and indirect excitons, providing control over the overlap of the electron and hole wave function and optimization of graph state generation.
Review
Nanoscience & Nanotechnology
Ying Yu, Shunfa Liu, Chang-Min Lee, Peter Michler, Stephan Reitzenstein, Kartik Srinivasan, Edo Waks, Jin Liu
Summary: This review article presents the physics and technological developments of epitaxial quantum dot devices emitting in the telecom bands for quantum network devices. The challenges and opportunities for future telecom quantum dot devices with improved performance and expanded functionality through hybrid integration are also discussed.
NATURE NANOTECHNOLOGY
(2023)
Article
Optics
Hang Dong, Zhixin Sun, Jingyi Li, Yahui Li, Wei Zhang, Guangyong Jin
Summary: This paper calculates thermal stresses and adsorption forces to determine laser cleaning conditions and establishes relevant models. Experimental results show that the removal effect is better with increasing nanosecond pulse delay, with the best effect achieved at 600 milliseconds pulse delay. Based on the findings, the mechanisms of oxide film removal involve thermal stress against adsorption and plasma shock wave breaking the oxide layer.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Junjie Zhang, Wenjun Li, Bingtao Li, Zheng-Da Hu, Jicheng Wang, Feng Zhang, Lei Wang
Summary: A multilayer thin film device structure based on Tamm plasmons is proposed for high-performance near-infrared hot electron photodetectors. By optimizing the device structure parameters, high responsivity detection can be achieved.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Hong Huang, Zhiguang Han
Summary: This paper proposes a new ghost imaging reconstruction method using ordered orthogonal Hadamard derived speckle as the illumination speckle series, and introduces the alternating direction multiplier method to improve the imaging performance. The evaluation results show that the method can achieve high-quality reconstructed images under low sampling conditions.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Moritsugu Sakamoto, Yuki Ono, Kohei Noda, Tomoyuki Sasaki, Nobuhiro Kawatsuki, Masayuki Tanaka, Hiroshi Ono
Summary: The effect of wavelength and polarization of illuminating light in polarization imaging for birefringent objects placed behind a scattering structure was experimentally investigated. The result shows that the spatial distribution of the birefringent object was more clearly visualized in the longer wavelength combined with circularly polarized light illumination. This finding indicates the potential of using polarization imaging with circularly polarized light illumination in the near-infrared range for visualizing birefringent objects with scattering.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Peihui Du, Hongfang Wang, Pengwei Li, Rukeyemuhan Abadula, Hmbat Batelbek, Min Gao
Summary: In this study, we theoretically demonstrate the strong coupling between Tamm plasmons and exciton polaritons in metal Al/DBR-molecular structures, extending the operating wavelength to the deep ultraviolet region. The coupling strength can be effectively manipulated by adjusting the structure parameters, offering potential benefits for the development of new-style optical filters.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Priyanka Chaudhary, Akhilesh Kumar Mishra
Summary: We design and numerically investigate the switching dynamics between two outer waveguides in a parity-time (PT)-symmetric adiabatically coupled three waveguides nonlinear directional coupler (NLDC) system. The study shows that the device can provide switching even when the middle waveguide is nonlinear and the outer waveguides are linear. Furthermore, the effect of loss to gain ratio on critical switching power and the impact of launched light power and gain (loss) value on transmitted power are also studied.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Wei Feng, Yongcong Yi, Shuyang Li, Zhi Xiong, Boya Xie, Zhen Zeng
Summary: Traditional imaging techniques are ineffective in achieving clear underwater imaging due to the presence of scattering media. Single-pixel imaging (SPI) system based on Unet++ offers a solution for reconstructing high-quality images in highly turbid water environments.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Xiaorui Qu, Jufeng Zhao, Haijun Tian, Junjie Zhu, Guangmang Cui
Summary: This paper studies the structural similarity between RGB and spectral images and proposes a non-iterative Images Structure Similarity (ISS) method for fast reconstruction of spectral images. Additionally, the input of the Deep Image Prior (DIP) method is optimized for the first time by using the initial spectral data reconstructed by ISS, leading to an improved starting value for the iteration. The experimental results show that the proposed method can enhance the reconstruction quality in both spectral and spatial resolutions, while significantly reducing the reconstruction time compared to other DIP-based methods.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Donghe Sheng, Zhe Han, Zanyang Qiao, Tianpei Dong, Chenxi Wang, Huiping Tian
Summary: In this study, a distributed multi-parameter sensor based on an etched few-mode multi-core fiber is proposed, allowing simultaneous sensing of temperature, strain, and sample refractive index. By combining space division multiplexing and stimulated Brillouin scattering, the sensor achieves high sensitivity in detecting these parameters.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Dehao Chen, Zhenwu Mo, Zehong Liang, Junjie Jiang, Huilin Tang, Yidan Sun, Ziyu Wang, Quanfeng Wei, Yanru Chen, Dongmei Deng
Summary: In this study, a novel family of elliptical Airyprime vortex beams (EAPVBs) is introduced, which inherits the excellent self-focusing properties of the circular Airyprime vortex beam (CAPVB). The asymmetric focusing of EAPVB leads to some novel properties, such as the splitting of high-order optical vortex and the formation of two foci. By taking advantage of these properties, EAPVB is constructed as a tunable optical bottle for particle capture.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Xiao Ma, Qiongchan Shao, Jian-Jun He
Summary: In this study, an SHS chip based on Su8 waveguide was designed and fabricated. By physically adjusting the metal electrodes and compensating for transmissivity fluctuations, the generation of side ripples was successfully suppressed.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Hongbin Zhang, Jiansen Du, Zongtao Chi, Hailin Cong, Bin Wang
Summary: In this paper, a novel type of dual-wavelength confocal metalens is proposed to solve the spatial crosstalk between two wavelengths. The metalens can greatly reduce the spatial crosstalk and achieve high precision and efficiency in confocal imaging. It can also focus light in specific wavelength ranges, making it suitable for imaging, microscopy, and optical fiber communication.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Rui Qiu, Guanmao Zhang, Shaokai Du, Jie Liu, Hongyu Jib, Kaiyun Bi, Bochuan Xing, Guangchao Diao
Summary: Recent research has developed an achromatic metalens that shows potential for replacing traditional lenses. This study focuses on a continuously variable focus height broadband achromatic metalens for long-wavelength infrared applications. By optimizing materials and parameters, chromatic aberration is effectively corrected, making it suitable for high-resolution LWIR imaging and spectroscopy systems.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Marcos Troncoso-Costas, Gaurav Jain, Yiming Li, Mohammed Patel, Lakshmi Narayanan Venkatasubramani, Sean O'Duill, Frank Smyth, Andrew Ellis, Francisco Diaz-Otero, Colm Browning, Liam Barry
Summary: In this work, a fast-switching tuneable laser capable of wide wavelength coverage, low noise and linewidth levels suitable for high-order modulation formats is demonstrated. The laser is characterized to cover a wavelength range of 35 nm in the C-band with nanosecond switching time. It is used to successfully demonstrate 480 Gbit/s 16QAM transmission over 25 km of single-mode fiber for a wavelength range of 19 nm.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Takeshi Moriyasu, Masahiko Tani, Hideaki Kitahara, Takashi Furuya, Jessica Afalla, Toshiro Kohmoto, Daishiro Koide, Hiroki Sato, Mitsutaka Kumakura
Summary: Optical pump-terahertz probe spectroscopy was used to study the photocarrier dynamics and optical characteristics of semiconductor Si. The results showed that the thickness of Si influenced the transmitted terahertz field amplitude and peak delay time, indicating differences in photocarrier dynamics between different Si materials.
OPTICS COMMUNICATIONS
(2024)
