Article
Chemistry, Physical
Xi Wang, Kaili Yao, Lihua Liu, Changxu Liu, Hongyan Liang
Summary: The research explores the impact of plasmonic morphology on solar energy conversion efficiency, with experimental evidence showing that nanorods demonstrate better energy performance likely due to the sharp curvature at tips.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Optics
Xiaoyue Yu, Guanqun Sun, Fangzheng Zhang, Shilong Pan
Summary: This Letter proposes the use of dual-wavelength-injection period-one laser dynamics to generate frequency-modulated microwave signals. The frequency and bandwidth of the generated signals can be easily adjusted by tuning the injection parameters.
Article
Optics
Anke Zhao, Ning Jiang, Jiafa Peng, Shiqin Liu, Yiqun Zhang, Kun Qiu
Summary: A novel scheme for generating optical chaos is proposed and experimentally demonstrated, which can simultaneously produce two low-correlation chaotic signals with wideband spectrum and suppressed time-delay-signature. The proposed scheme improves the bandwidth of ECSL-based chaos by several times and generates another wideband flat-spectrum chaotic signal. The undesired TDS characteristics of the simultaneously-generated chaotic signals can be efficiently suppressed, and the correlation coefficient between these signals is small.
OPTO-ELECTRONIC ADVANCES
(2022)
Review
Chemistry, Multidisciplinary
Yawen Liu, Hao Ma, Xiao Xia Han, Bing Zhao
Summary: SERS has become an important tool in chemical analysis, materials science, and biomedical research. The development and application of metal-semiconductor heterostructures in SERS research have shown great potential for diverse applications and advancement in photovoltaic devices and chemical/biological sensing. The unique photoelectric properties and giant SERS signals of metal-semiconductor heterostructures contribute to their significant role in enhancing light harvesting and conversion.
MATERIALS HORIZONS
(2021)
Article
Multidisciplinary Sciences
Grigory Lihachev, Wenle Weng, Junqiu Liu, Lin Chang, Joel Guo, Jijun He, Rui Ning Wang, Miles H. Anderson, Yang Liu, John E. Bowers, Tobias J. Kippenberg
Summary: The past decade has seen significant advances in the development and system-level applications of photonic integrated microcombs, with the use of both dissipative Kerr solitons (DKS) and platicons. Unlike DKS microcombs that require specific designs and fabrication techniques, platicon microcombs can be easily built using CMOS-compatible platforms. This study demonstrates a fully integrated platicon microcomb using laser self-injection locking, potentially enabling widespread adoption of microcombs in photonic integrated circuits through commercial foundry service.
NATURE COMMUNICATIONS
(2022)
Article
Optics
Chaojie Chen, Zhiwei Jia, Yuxiang Lv, Pu Li, Bingjie Xu, Yuncai Wang
Summary: This study introduces a method to generate broadband laser chaos using a QCL, showing evidence that the QCL can route to chaos through a quasi-periodic path with optical feedback. The influence of feedback intensity and bias current on chaos bandwidth is also investigated, revealing a significant bandwidth of 43.1 GHz due to the absence of relaxation oscillation phenomena in QCLs.
Article
Physics, Applied
Li Wang, Tsung-Tse Lin, Ke Wang, Hideki Hirayama
Summary: This study investigates the impact of parasitic absorption in the narrow module architecture with only two quantum wells, in the context of terahertz quantum cascade lasers utilizing the nonalignment injection scheme via direct-phonon resonance. The optical gain is found to be limited to small (or negative) values even at low temperatures. To address this issue, a strategy of suppressing parasitic absorption by increasing the injection energy is adopted, resulting in successful lasing at 194 K.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Neha Verma, Anil Govindan, Pawan Kumar
Summary: Graphene is a suitable 2D material for generating Terahertz surface plasmons (THz-SPs). A mechanism is proposed for efficiently generating THz SPs in a graphene-coated optical fiber. The thickness of the graphene sheet and the radius of the optical fiber are important parameters that affect the resonant frequency of the THz SPs. By exerting a ponderomotive force on the electrons in graphene, induced by two lasers at different frequencies, a nonlinear current is generated, driving the generation of THz SPs.
Article
Biochemistry & Molecular Biology
Umm-I-Kalsoom, Nisar Ali, Shazia Bashir, Samina Akbar, Muhammad Shahid Rafique, Ali Mohammad Alshehri, Narjis Begum, Tanveer Iqbal, Aneela Anwar
Summary: The present study examined the impact of KrF Excimer laser irradiation on Cadmium (Cd) targets, revealing the formation of laser induced nano/micro structures under different numbers of laser pulses. Results showed distinct surface structures generated in air versus propanol during the irradiation process.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
Ivan Oladyshkin
Summary: We theoretically demonstrate that an intense femtosecond optical pulse incident normally on a metal surface will decay into a pair of counterpropagating surface plasmon polaritons (SPPs). The interference field causes periodic heating of the medium, resulting in a periodic permittivity perturbation and resonant amplification of the SPPs. This mechanism is crucial for understanding the dynamics of optical pulse absorption under damaging conditions and for interpreting laser-induced periodic surface structure formation in different pumping regimes.
Review
Materials Science, Multidisciplinary
Xuanru Zhang, Wen Yi Cui, Yi Lei, Xin Zheng, Jingjing Zhang, Tie Jun Cui
Summary: Localized surface plasmons (LSPs) in metal nanoparticles are highly sensitive to the dielectric environment, making them ideal sensors. The concept has expanded to spoof LSPs in microwave and terahertz frequencies, offering deep-subwavelength confinement and sensitivity enhancement with low loss. Advances in technology have enabled applications in various fields such as liquid sensing, gas sensing, and wearable sensing.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Article
Optics
Ruiyan Li, Tingting Zou, Xiuyun Li, Zhi Yu, Jianjun Yang
Summary: Understanding the formation mechanisms and designs of nanostructures is important for fundamental science and applications. This study proposed a strategy for creating high regularity concentric rings within a silicon microcavity using femtosecond laser. The morphology of these rings can be adjusted by pre-fabricated structures and laser parameters. The formation mechanism involves near-field interference and scattering light from the pre-fabricated structures, as revealed by Finite-Difference-Time-Domain simulations. This research provides a new method for designing periodic surface structures.
Article
Engineering, Electrical & Electronic
Xiao-Zhou Li, Xiaoqing Zhou, Yiying Gu, Mingshan Zhao
Summary: By exploring the injection parameter space, chaotic waveforms with rogue waves or Gaussian distributions can be generated in optically injected semiconductor lasers. The importance of injection parameters for tuning the statistics associated with chaotic lasers is revealed through the investigation of different parameters.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2022)
Article
Chemistry, Physical
Ludwig Huettenhofer, Matthias Golibrzuch, Oliver Bienek, Fedja J. Wendisch, Rui Lin, Markus Becherer, Ian D. Sharp, Stefan A. Maier, Emiliano Cortes
Summary: Tailoring the optical properties of photocatalysts through nanostructuring can enhance solar light harvesting efficiencies, with imprint lithography developed for large-scale fabrication of semiconductor photoelectrodes. The combination of anapole excitations and metasurface lattice resonances improves the absorption efficiency of model materials over the visible spectrum, leading to a significant enhancement of photocurrent under solar illumination conditions.
ADVANCED ENERGY MATERIALS
(2021)
Article
Multidisciplinary Sciences
Chia Ho Wu, Chengyang Liu, Xianqing Lin, Wei Wang, Yi Chun Guo, Zhuoyuan Wang, Guoqiang Ye, Fang He, Donghua Ni, Xiaolong Wang, Linfang Shen, Jianqi Shen, Zhengbing Cai, Gang Chen
Summary: In this study, a photonic analog of Peierls transition was observed in a 1-D triangular metal diaphragm array, where photonic bandgap structures were designed by adjusting metal diaphragm positions. Numerical analysis and experimental measurements confirmed the importance of photonic Peierls transition for designing new types of guided wave devices.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Physical
Yuwei Shen, Johanna Woodburn, Soraya Bouras, Shan Dai, Iurii Dovgaliuk, Jean-Marc Greneche, Gilles Patriarche, Latevi Max Lawson Daku, Christian Serre, Antoine Tissot
Summary: In this article, a novel strategy for preparing bistable porous nanocrystals is presented, which involves anchoring switchable molecules in the pores of a host matrix through strong host-guest interactions. The loaded nanocrystals, based on a prototypical Fe(III) spin-crossover complex in MOF-808, exhibit a hysteretic thermal spin transition close to room temperature, regardless of the complex loading and the MOF particle size, while maintaining high porosity, making them promising for applications in chemical sensing.
CHEMISTRY OF MATERIALS
(2023)
Article
Physics, Fluids & Plasmas
Deepa Verma, Armelle Michau, Angela Vasanelli, Carlo Sirtori, Khaled Hassouni
Summary: The kinetic behavior of electrons in a thin semiconductor layer subjected to voltage pulses is investigated using particle-in-cell/Monte Carlo collision simulations based on the electron Boltzmann equation. The results show that highly nonlinear interactions between the space-charge field and the electrons lead to oscillations due to the relatively high plasma density. The dynamics and phase-space trajectories of the excited electron waves depend on the doping level. Strong oscillations occur during the relaxation phase and are subsequently damped with time scales between 100 and 400 fs, decreasing with doping level. The emitted power spectra exhibit a high-energy band and a low-energy peak, attributed to bounded plasma resonances and a sheath effect, respectively.
PHYSICS OF PLASMAS
(2023)
Article
Nanoscience & Nanotechnology
Laurent Boulley, Thomas Maroutian, Paul Goulain, Andrey Babichev, Anton Egorov, Lianhe Li, Edmund Linfield, Raffaele Colombelli, Adel Bousseksou
Summary: We demonstrate low temperature deposition conditions for VO2 phase change material that are compatible with III-V semiconductors used in optoelectronic applications. The VO2 coated thin films grown on GaAs exhibit a 50% change in optical reflectivity and a significant variation in electric conductivity between insulating and metallic states. We also study the functionalization of mid-infrared QCLs with VO2 layers to engineer their laser emission properties.
Article
Materials Science, Multidisciplinary
Jiawen Liu, Djamal Gacemi, Konstantinos Pantzas, Gregoire Beaudoin, Isabelle Sagnes, Angela Vasanelli, Carlo Sirtori, Yanko Todorov
Summary: An optomechanical scheme is presented to achieve light-controlled logic functions by combining an electromagnetic resonator with a strongly nonlinear nanomechanical oscillator. The nonlinear mechanical oscillations, controlled by external drives, are sensitive to incident light due to enhanced light-matter interactions. Reconfigurable logic functions (NOT, XOR, OR, AND) can be realized by adjusting the initial mechanical configurations to obtain various responses to input optical signals.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Mathematics, Applied
Soizic Terrien, Bernd Krauskopf, Neil G. R. Broderick, Venkata A. Pammi, Remy Braive, Isabelle Sagnes, Gregoire Beaudoin, Konstantinos Pantzas, Sylvain Barbay
Summary: In this study, the emergence of complex pulsing dynamics, including periodic, quasiperiodic, and irregular pulsing regimes, in an excitable microlaser subject to delayed optical feedback is investigated. A mathematical model, written as a system of delay differential equations, is used to perform an in-depth bifurcation analysis. Resonance tongues are found to play a key role in the emergence of complex dynamics.
Article
Biochemistry & Molecular Biology
Ioanna Christodoulou, Pengbo Lyu, Carla Vieira Soares, Gilles Patriarche, Christian Serre, Guillaume Maurin, Ruxandra Gref
Summary: Metal-organic frameworks (MOFs) have gained interest in biomedical applications, with the mesoporous iron(III) carboxylate MIL-100(Fe) being one of the most studied MOF nanocarriers. Nanosized MIL-100(Fe) particles coordinate with drugs to achieve high drug loading and controlled release. A study investigated the interactions between the anticancer drug prednisolone and nanoMOFs, showing that prednisolone with phosphate groups had the strongest interactions and slowed down degradation, while prednisolone with sulfate groups had lower efficiencies and easily released in phosphate media. The nanoMOFs maintained their structure even after drug loading and degradation. Scanning electron microscopy and X-Ray energy-dispersive spectrometry were used to analyze the structural evolution.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Optics
Baptise Chomet, Nathan Vigne, Gregoire Beaudoin, Konstantinos Pantzas, Stephane Blin, Isabelle Sagnes, Stephane Denet, Arnaud Garnache
Summary: The emission dynamics of a multimode broadband interband semiconductor laser have been examined through experimentation and theory. The study reveals the presence of a modulational instability in the nonlinear dynamics of a III-V semiconductor quantum well surface-emitting laser, observed in the anomalous dispersion regime. An additional unstable region arises in the normal dispersion regime due to carrier dynamics, which is not found in systems with fast gain recovery. The interplay between cavity dispersion and phase sensitive non-linearities is shown to significantly impact the laser emission behavior.
Article
Materials Science, Multidisciplinary
Paul Goulain, Chris Deimert, Mathieu Jeannin, Stefano Pirotta, Wojciech Julian Pasek, Zbigniew Wasilewski, Raffaele Colombelli, Jean-Michel Manceau
Summary: Continuously graded parabolic quantum wells are used to overcome the limitations of square quantum wells at terahertz frequencies. Microcavity intersubband polaritons are formed at frequencies as low as 1.8 THz, with ultra-strong coupling sustained up to 200 K. The use of sub-wavelength resonators preserves the ultra-strong coupling regime, making it a potential approach for generating non-classical light.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Audrey Gilbert, Michel Ramonda, Laurent Cerutti, Charles Cornet, Gilles Patriarche, Eric Tournie, Jean-baptiste Rodriguez
Summary: This study focuses on the control of antiphase domain formation and evolution in III-V semiconductor epitaxial growth on a low-miscut Si (001) substrate. The crystal polarity of thin GaAs epilayers grown through molecular-beam epitaxy is determined by the Si surface topology, resulting in a quasi-periodic 1D pattern of antiphase domains in the GaAs layer. The study also demonstrates how this configuration breaks the symmetry between different III-V phases, leading to early burying of antiphase domains in GaAs epitaxially grown on a low-miscut Si substrate.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Physical
Corentin Dabard, Erwan Bossavit, Tung Huu Dang, Nicolas Ledos, Mariarosa Cavallo, Adrien Khalili, Huichen Zhang, Rodolphe Alchaar, Gilles Patriarche, Angela Vasanelli, Benjamin T. Diroll, Aloyse Degiron, Emmanuel Lhuillier, Sandrine Ithurria
Summary: In the visible range, 2D nanoplatelets (NPLs) have advantages such as anisotropic emission, narrower photoluminescence (PL) signal, and design flexibility in heterostructures. However, there is limited research on cadmium chalcogenide NPLs in the infrared range. This study focuses on stabilizing the PL of 2D HgTe NPLs through surface chemistry and demonstrates important steps towards bright infrared light emitting diodes (LEDs), including coupling to a plasmonic grating and achieving electroluminescence at 1300 nm, near telecom wavelength.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Optics
Yuhao Jin, Fangyuan Sun, Jinghao Li, Chuan Seng Tan, Kian Hua Tan, Satrio Wicaksono, Carlo Sirtori, Soon Fatt Yoon, Qi Jie Wang
Summary: Tunable single-mode slot waveguide QCL array has been developed for high-resolution and highly sensitive trace gases sensing in the MIR region. This laser array exhibits a tuning range of approximately 12 cm(-1) and has been successfully used for individual gas sensing and absorption measurements of mixed gases.
Article
Multidisciplinary Sciences
Francesco Pisani, Djamal Gacemi, Angela Vasanelli, Lianhe Li, Alexander Giles Davies, Edmund Linfield, Carlo Sirtori, Yanko Todorov
Summary: In this study, a quantum infrared detector operating in the ultra-strong light-matter coupling regime driven by collective electronic excitations is explored. The strong collective electronic resonances are found to optimize photodetectors operating in this regime. These findings introduce a new approach to conceive optoelectronic devices based on the coherent interaction between electrons and photons.
NATURE COMMUNICATIONS
(2023)
Article
Environmental Sciences
Jingfeng Liu, Luyao Xin, Lixia Qin, Taiyang Zhang, Xiangqing Li, Shi-Zhao Kang
Summary: A flexible SERS sensing platform was developed to monitor the concentration of benzotriazole in water. The platform showed high sensitivity with a detection limit of 0.01 nmol L-1 and excellent repeatability and reproducibility. This research is important for real-time monitoring of trace benzotriazole in tap water.
