Article
Engineering, Electrical & Electronic
Jianan Fang, Yinqi Wang, E. Wu, Ming Yan, Kun Huang, Heping Zeng
Summary: In this paper, an ultra-sensitive imaging system for telecom photons based on non-degenerate two-photon absorption in a silicon-based EMCCD is experimentally demonstrated. The proposed long-wavelength-pumping scheme effectively increases the two-photon absorption coefficient and suppresses background noise. The system offers over 30-folded enhancement of the photon-counting rate, unprecedented detection sensitivity, high spatial resolution, and a broad spectral window.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2022)
Article
Optics
Shoujun Zhang, Xieyu Chen, Kuan Liu, Yuanhao Lang, Quan Xu, Ranjan Singh, Tun Cao, Zhen Tian
Summary: This study demonstrates the dynamic manipulation of on-chip terahertz (THz) metadevices through optical modulation and phase shift. A reconfigurable multilevel THz SP metalens switch with high extinction ratio is presented, and a switchable THz SP varifocal metalens is realized. These results show a promising route toward non-volatile, reconfigurable, and energy-efficient on-chip THz integrated metadevices, advancing the field of terahertz-integrated photonics.
LASER & PHOTONICS REVIEWS
(2023)
Article
Nanoscience & Nanotechnology
Hengsong Yue, Tao Chu
Summary: This report evaluates the performance of robust RF filters based on a single silicon in-phase/quadrature modulator. The filters show significantly improved temperature and optical carrier wavelength sensitivities compared to silicon resonators. The filters can be reconfigured as different types and can be used in dynamic environments.
Article
Physics, Applied
Martin A. Wolff, Fabian Beutel, Jonas Schuette, Helge Gehring, Matthias Haeussler, Wolfram Pernice, Carsten Schuck
Summary: This work demonstrates a method to achieve high detection efficiency and wide wavelength range in a single waveguide-integrated SNSPD device, with efficient coupling between optical fibers and detectors through a three-dimensional interface.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Alessandro Prencipe, Samuel Gyger, Mohammad Amin Baghban, Julien Zichi, Katharina D. Zeuner, Thomas Lettner, Lucas Schweickert, Stephan Steinhauer, Ali W. Elshaari, Katia Gallo, Val Zwiller
Summary: This study reports on the implementation of superconducting nanowire single-photon detectors on thin film lithium niobate ridge nano-waveguides, which shows great potential for on-chip quantum optics experiments.
Article
Nanoscience & Nanotechnology
Heqing Wang, Yang Shi, Yan Zuo, Yu Yu, Lei Lei, Xinliang Zhang, Zhengfang Qian
Summary: Germanium-on-silicon (Ge-on-Si) single photon avalanche diodes (SPADs) are proposed and demonstrated as high-performance waveguide coupled Ge-on-Si separate-absorption-charge-multiplication SPADs with three electric terminals. This SPAD exhibits high on-chip single photon detection efficiency and low dark count rates, making it suitable for applications in on-chip quantum communication and lidar. The proposed three-terminal SPAD enables high-yield fabrication and provides robust performance in operation.
Article
Chemistry, Analytical
Taylor Shields, Adetunmise C. Dada, Lennart Hirsch, Seungjin Yoon, Jonathan M. R. Weaver, Daniele Faccio, Lucia Caspani, Marco Peccianti, Matteo Clerici
Summary: The THz electro-optical sampling technique using single-photon detectors and squeezed vacuum field as the optical probe has been successfully demonstrated in experiments. The sensitivity of the field measurement is limited by the statistical properties of the probe state, which can be improved by using phase-locked single-photon detectors.
Review
Chemistry, Multidisciplinary
Andreas Pfenning, Sebastian Krueger, Fauzia Jabeen, Lukas Worschech, Fabian Hartmann, Sven Hoefling
Summary: Optical quantum information science and technologies require the ability to generate, control, and detect single or multiple quanta of light. Superconducting nanowire single-photon detectors and single-photon avalanche diodes are currently the top performers in this field, but other promising devices are emerging. This review article focuses on a specific alternative single-photon detector - the resonant tunneling diode - and discusses its advantages, limitations, and potential improvements.
Article
Nanoscience & Nanotechnology
Yanqiu Guan, Haochen Li, Labao Zhang, Hao Wang, Guanglong He, Biao Zhang, Yue Fei, Jiayu Lv, Xiao Zhang, Rui Yin, Xiaohan Wang, Xuecou Tu, Qingyuan Zhao, Xiaoqing Jia, Jian Chen, Lin Kang, Peiheng Wu
Summary: We propose a single-channel readout and imaging scheme based on compressed sensing, which combines and reconstructs the response signals from all of the pixels of SNSPD arrays. The compressed sampling of each pixel is achieved by randomly switching the bias current, and the counts of each pixel are reconstructed according to the sampling matrices and combined readout signals.
Review
Chemistry, Multidisciplinary
Hailu Wang, Jiaxiang Guo, Jinshui Miao, Wenjin Luo, Yue Gu, Runzhang Xie, Fang Wang, Lili Zhang, Peng Wang, Weida Hu
Summary: This article introduced the working principles of single-photon detectors and conventional SPDs, and discussed new photon-counting detectors based on 0D, 1D, and 2D materials. These low-dimensional materials exhibit exotic properties due to the quantum confinement effect, potentially used for ultra-weak light detection.
Article
Quantum Science & Technology
Francesco Ceccarelli, Giulia Acconcia, Angelo Gulinatti, Massimo Ghioni, Ivan Rech, Roberto Osellame
Summary: The article discusses the significance of single-photon detectors in photonic quantum technologies, comparing the characteristics and applications of superconducting nanowire single-photon detectors and single-photon avalanche diodes. The authors review the fundamental principles of SPAD operation and provide a discussion of recent progress in the field, offering insights into potential future developments.
ADVANCED QUANTUM TECHNOLOGIES
(2021)
Article
Optics
Kazuhiro Kuruma, Hironobu Yoshimi, Yasutomo Ota, Ryota Katsumi, Masahiro Kakuda, Yasuhiko Arakawa, Satoshi Iwamoto
Summary: This study reports single-photon sources using single quantum dots embedded in topological slow light waveguides based on valley photonic crystals. The experiment demonstrates Purcell-enhanced single-photon emission in a topological slow light mode with a group index over 20, showing robust propagation even under sharp bends.
LASER & PHOTONICS REVIEWS
(2022)
Article
Optics
Yanqiu Guan, Haochen Li, Li Xue, Rui Yin, Labao Zhang, Hao Wang, Guanghao Zhu, Lin Kang, Jian Chen, Peiheng Wu
Summary: This article reviews the advantages and applications of superconducting nanowire single-photon detectors (SNSPDs) in single-photon Lidar systems, and prospects the future development.
OPTICS AND LASERS IN ENGINEERING
(2022)
Article
Optics
Shan Zhang, Xue Feng, Wei Zhang, Kaiyu Cui, Fang Liu, Yidong Huang
Summary: This study demonstrates a heralded single-photon source with switchable orbital angular momentum (OAM) modes on a silicon chip. It successfully generates and switches multiple OAM modes and operates at room temperature. This provides a practical platform for high-dimensional quantum information processing and can be extended to other material systems to enhance performance.
LASER & PHOTONICS REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Chunhuan Zhang, Fang-Jie Shu, Chang-Ling Zou, Haiyun Dong, Jiannian Yao, Yong Sheng Zhao
Summary: Synthetic photonic materials exploiting PT symmetry are revolutionizing the photonic sciences. However, current PT-symmetric microcavity laser systems suffer from limited laser spectral bandwidth. In this study, a reconfigurable PT-symmetric microcavity system with controllable complex refractive indices is proposed using an organic composite material system and a grayscale electron-beam direct-writing technique. The introduction of organic photoisomerizable compounds enables dynamically tunable single-mode laser output.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Barbara Ursula Lehner, Tim Seidelmann, Gabriel Undeutsch, Christian Schimpf, Santanu Manna, Michal Gawelczyk, Saimon Filipe Covre da Silva, Xueyong Yuan, Sandra Stroj, Doris E. Reiter, Vollrath Martin Axt, Armando Rastelli
Summary: The study investigates the behavior of entangled photon pairs from quantum dots at elevated temperatures and finds degradation in entanglement as well as changes in decay dynamics. This research provides important insights for optimizing quantum dots as sources of highly entangled photons at higher temperatures.
Article
Nanoscience & Nanotechnology
Leon Zaporski, Noah Shofer, Jonathan H. Bodey, Santanu Manna, George Gillard, Martin Hayhurst Appel, Christian Schimpf, Saimon Filipe Covre da Silva, John Jarman, Geoffroy Delamare, Gunhee Park, Urs Haeusler, Evgeny A. Chekhovich, Armando Rastelli, Dorian A. Gangloff, Mete Atature, Claire Le Gall
Summary: Combining highly coherent spin control with efficient light-matter coupling, this study demonstrates the ability to decouple electron spin qubits in optically active semiconductor quantum dots beyond 0.113(3) ms, overcoming the limitations imposed by nuclear inhomogeneity. The findings show a promising solution to the material science challenge and establish the basis for highly coherent spin-photon interfaces.
NATURE NANOTECHNOLOGY
(2023)
Article
Optics
Pierre Edinger, Gaehun Jo, Chris Phong Van Nguyen, Alain Yuji Takabayashi, Carlos Errando-Herranz, Cleitus Antony, Giuseppe Talli, Peter Verheyen, Umar Khan, Simon J. Bleiker, Wim Bogaerts, Niels Quack, Frank Niklaus, Kristinn B. Gylfason
Summary: This study demonstrates an add-drop ring resonator with independent tuning of round-trip phase and coupling using low-power microelectromechanical (MEMS) actuation. The phase shifters can tune the resonance wavelength by 0.15 nm, while the tunable couplers can adjust the optical resonance extinction ratio from 0 to 30 dB. The MEMS rings are individually vacuum-sealed on wafer scale, providing reliable and long-term protection from the environment. Mechanical actuators were cycled for more than 4 x 10^9 cycles at 100 kHz without degradation in their response curves, and a modulation increase of up to 15 dB was demonstrated with a voltage bias of 4 V and a peak drive amplitude as low as 20 mV.
Review
Chemistry, Physical
Panagiotis Grammatikopoulos, Theodoros Bouloumis, Stephan Steinhauer
Summary: This article provides an overview of recent advances in nanoparticle growth experiments via gas-phase synthesis, specifically magnetron-sputtering inert-gas condensation. It discusses the applications of gas-phase synthesized nanoparticles in energy, catalysis, sensing, and neuromorphic devices for unconventional computing. The challenges and limiting factors are identified, and potential solutions involving advances in nanoparticle source instrumentation and in situ diagnostics are outlined. The article concludes by suggesting the most promising and impactful applications of gas-phase synthesized nanoparticles in the future.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Multidisciplinary Sciences
Peter Millington-Hotze, Santanu Manna, Saimon F. Covre da Silva, Armando Rastelli, Evgeny A. Chekhovich
Summary: The spin diffusion in inhomogeneously polarized many-body systems, such as nuclear spin lattices, is described classically by the spin diffusion concept. In this study, the authors directly observed spin diffusion in a single GaAs/AlGaAs quantum dot through oscillatory spin relaxation dynamics and found that electron spin accelerates nuclear spin relaxation, challenging the previously proposed Knight-field-gradient diffusion barrier concept. The findings have significant implications for understanding nuclear spin diffusion in quantum dots.
NATURE COMMUNICATIONS
(2023)
Article
Nanoscience & Nanotechnology
Niels Quack, Alain Yuji Takabayashi, Hamed Sattari, Pierre Edinger, Gaehun Jo, Simon J. Bleiker, Carlos Errando-Herranz, Kristinn B. Gylfason, Frank Niklaus, Umar Khan, Peter Verheyen, Arun Kumar Mallik, Jun Su Lee, Moises Jezzini, Padraic Morrissey, Cleitus Antony, Peter O'Brien, Wim Bogaerts
Summary: Silicon photonics is a mature technology with various applications, such as optical communications, sensing, computing, and quantum information processing. It offers excellent performance, high yield, and high-volume capacity through standardized manufacturing technology. However, the weak electro-optic effects of silicon limit the integration scale. By incorporating MEMS technology, the limitations can be overcome, allowing for compact, low-loss, broadband, fast, and low-power devices. This integration enables the scaling of photonic integrated circuits for telecommunications, neuromorphic computing, sensing, programmable photonics, and quantum computing.
MICROSYSTEMS & NANOENGINEERING
(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
Chemistry, Multidisciplinary
Alessandro Prencipe, Samuel Gyger, Mohammad Amin Baghban, Julien Zichi, Katharina D. Zeuner, Thomas Lettner, Lucas Schweickert, Stephan Steinhauer, Ali W. Elshaari, Katia Gallo, Val Zwiller
Summary: This study reports on the implementation of superconducting nanowire single-photon detectors on thin film lithium niobate ridge nano-waveguides, which shows great potential for on-chip quantum optics experiments.
Review
Nanoscience & Nanotechnology
Gabriel Gomes, Marcos L. F. Gomes, Saimon F. Covre da Silva, Ailton Garcia Jr, Armando Rastelli, Odilon D. D. Couto Jr, Angelo Malachias, Christoph Deneke
Summary: This review discusses the influence of the inherently asymmetric strain state of rolled-up III-V heterostructure tubes on light emitters. Whispering gallery mode resonators built from rolled-up III-V heterostructures are briefly reviewed. The curvature and its influence on the diameter of the rolled-up micro- and nanotubes are discussed, as well as the possible strain states. Experimental techniques are essential to accurately determine the strain state for the emitters inside the tube wall.
Article
Optics
Vikas Remesh, Ria G. Kraemer, Rene Schwarz, Florian Kappe, Yusuf Karli, Malte Per Siems, Thomas K. Bracht, Saimon Filipe Covre da Silva, Armando Rastelli, Doris E. Reiter, Daniel Richter, Stefan Nolte, Gregor Weihs
Summary: A scalable source of single photons is crucial for efficient quantum photonic architecture. Semiconductor quantum dots have great potential for this purpose, and a compact and efficient method for chirped pulse excitation is proposed using chirped fiber Bragg gratings.
Article
Materials Science, Multidisciplinary
T. Seidelmann, T. K. Bracht, B. U. Lehner, C. Schimpf, M. Cosacchi, M. Cygorek, A. Vagov, A. Rastelli, D. E. Reiter, V. M. Axt
Summary: Semiconductor quantum dots are a promising platform for generating polarization-entangled photon pairs, but current two-photon excitation schemes limit the achievable degree of entanglement due to introducing which-path information. This study investigates the combined impact of two-photon excitation and longitudinal acoustic phonons on photon pairs emitted by strongly-confining quantum dots. The findings show that phonons further reduce the achievable degree of entanglement, even at low temperature, due to phonon-induced pure dephasing and phonon-assisted one-photon processes.
Article
Materials Science, Multidisciplinary
Xueyong Yuan, Saimon F. Covre da Silva, Diana Csontosova, Huiying Huang, Christian Schimpf, Marcus Reindl, Junpeng Lu, Zhenhua Ni, Armando Rastelli, Petr Klenovsky
Summary: The optical properties of excitons in GaAs/AlGaAs quantum dots subjected to variable quasiuniaxial stress were examined. The quantum dot morphology and externally induced strain tensor at the quantum dot positions were determined to validate computational tools for describing nanostructure optical properties. The strain-dependent excitonic emission energy, degree of linear polarization, and fine-structure splitting were calculated using a combination of eight-band k • p formalism with multiparticle corrections using the configuration interaction method. The experimental observations were quantitatively well reproduced by the calculations and deviations were discussed.
Article
Materials Science, Multidisciplinary
Florian Kappe, Yusuf Karli, Thomas K. Bracht, Saimon Filipe Covre da Silva, Tim Seidelmann, Vollrath Martin Axt, Armando Rastelli, Gregor Weihs, Doris E. Reiter, Vikas Remesh
Summary: This study demonstrates that adiabatic rapid passage (ARP) can simultaneously excite biexciton states in multiple, spatially separated, and spectrally different quantum dots. Moreover, for positive chirps, the influence of phonons weakens the sensitivity to spectral detunings and reduces the required excitation power. This is a significant step towards implementing high photon rate, entanglement-based quantum key distribution protocols.
MATERIALS FOR QUANTUM TECHNOLOGY
(2023)
