Photonics, Vol. 11, Pages 555: High-Repetition-Rate 2.3–2.7 µm Acousto-Optically Tuned Narrow-Line Laser System Comprising Two Master Oscillators and Power Amplifiers Based on Polycrystalline Cr2+:ZnSe with the 2.1 µm Ho3+:YAG Pulsed Pumping
MDPI » Photonics
by Oleg Antipov, Ilya Eranov, Stanislav Balabanov, Anton Dobryinin, Yuri Getmanovskiy, Valeriy Sharkov, Nikolay Yudin
5h ago
Photonics, Vol. 11, Pages 555: High-Repetition-Rate 2.3–2.7 µm Acousto-Optically Tuned Narrow-Line Laser System Comprising Two Master Oscillators and Power Amplifiers Based on Polycrystalline Cr2+:ZnSe with the 2.1 µm Ho3+:YAG Pulsed Pumping Photonics doi: 10.3390/photonics11060555 Authors: Oleg Antipov Ilya Eranov Stanislav Balabanov Anton Dobryinin Yuri Getmanovskiy Valeriy Sharkov Nikolay Yudin High-average-power narrow-linewidth tunable solid-state lasers in the wavelength region between 2 and 3 μm are attractive light sources for many applications ..read more
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Photonics, Vol. 11, Pages 552: Methods Controlling Radiation Parameters of Mode-Locked All-Fiberized Lasers
MDPI » Photonics
by Sergey Kobtsev
5h ago
Photonics, Vol. 11, Pages 552: Methods Controlling Radiation Parameters of Mode-Locked All-Fiberized Lasers Photonics doi: 10.3390/photonics11060552 Authors: Sergey Kobtsev Fibre lasers are distinct in that their optical train is decoupled from the environment, especially in the all-fibre format. The attractive side of this decoupling is the simplicity of maintenance (no need to align the cavity or keep the optical elements clean), but the flip side of this is the difficulty one encounters when trying to control the output parameters. The components used in all-fibre laser cavities are usually ..read more
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Photonics, Vol. 11, Pages 553: Monte Carlo Simulation of Quantum-Cutting Nanocrystals as the Luminophore in Luminescent Solar Concentrators
MDPI » Photonics
by Qi Nie, Wenqing Li, Xiao Luo
5h ago
Photonics, Vol. 11, Pages 553: Monte Carlo Simulation of Quantum-Cutting Nanocrystals as the Luminophore in Luminescent Solar Concentrators Photonics doi: 10.3390/photonics11060553 Authors: Qi Nie Wenqing Li Xiao Luo Quantum-cutting luminescent solar concentrators (QC-LSCs) have great potential to serve as large-area solar windows. These QC nanocrystals can realize a photoluminescence quantum yield (PLQY) of as high as 200% with virtually zero self-absorption loss. Based on our previous work, we have constructed a Monte Carlo simulation model that is suitable to simulate the performance of the ..read more
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Photonics, Vol. 11, Pages 554: Design of Channel Drop Filters Based on Photonic Crystal with a Dielectric Column with Large Radius inside Ring Resonator
MDPI » Photonics
by Ailing Zhang, Xiangyu Yang, Junfeng Wang
5h ago
Photonics, Vol. 11, Pages 554: Design of Channel Drop Filters Based on Photonic Crystal with a Dielectric Column with Large Radius inside Ring Resonator Photonics doi: 10.3390/photonics11060554 Authors: Ailing Zhang Xiangyu Yang Junfeng Wang Photonic crystal channel drop filters (CDFs) play a vital role in optical communication owing to their ability to drop the desired channel. However, it remains challenging to achieve high-efficiency CDFs. Here, we demonstrate a highly efficient three-channel CDF with both high transmission and high quality (Q) factor based on a novel ring resonator that is ..read more
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Photonics, Vol. 11, Pages 550: Long-Term Stability Test for Femtosecond Laser-Irradiated SnO2-Nanowire Gas Sensor for C7H8 Gas Sensing
MDPI » Photonics
by Sanghoon Ahn, Kang Woo Chun, Changkyoo Park
1d ago
Photonics, Vol. 11, Pages 550: Long-Term Stability Test for Femtosecond Laser-Irradiated SnO2-Nanowire Gas Sensor for C7H8 Gas Sensing Photonics doi: 10.3390/photonics11060550 Authors: Sanghoon Ahn Kang Woo Chun Changkyoo Park In this study, femtosecond (FS) laser irradiation with different laser energy densities of 138, 276, and 414 mJ/cm2 is applied to SnO2-nanowire (NW) gas sensors, and the effect of the FS laser irradiation on the gas sensor response toward toluene (C7H8) gas is investigated. The FS laser irradiation causes oxygen deficiency in the SnO2 NWs and forms SnO and SnOx. Moreover ..read more
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Photonics, Vol. 11, Pages 551: Mathieu–Hill Equation Stability Analysis for Trapped Ions: Anharmonic Corrections for Nonlinear Electrodynamic Traps
MDPI » Photonics
by Bogdan M. Mihalcea
1d ago
Photonics, Vol. 11, Pages 551: Mathieu–Hill Equation Stability Analysis for Trapped Ions: Anharmonic Corrections for Nonlinear Electrodynamic Traps Photonics doi: 10.3390/photonics11060551 Authors: Bogdan M. Mihalcea The stability properties of the Hill equation are discussed, especially those of the Mathieu equation that characterize ion motion in electrodynamic traps. The solutions of the Mathieu-Hill equation for a trapped ion are characterized by employing the Floquet theory and Hill’s method solution, which yields an infinite system of linear and homogeneous equati ..read more
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Photonics, Vol. 11, Pages 549: A Highly Sensitive Plasmonic Graphene-Based Structure for Deoxyribonucleic Acid Detection
MDPI » Photonics
by Zohre Salehnezhad, Mohammad Soroosh, Haraprasad Mondal
4d ago
Photonics, Vol. 11, Pages 549: A Highly Sensitive Plasmonic Graphene-Based Structure for Deoxyribonucleic Acid Detection Photonics doi: 10.3390/photonics11060549 Authors: Zohre Salehnezhad Mohammad Soroosh Haraprasad Mondal In this study, a Kretschmann structure with a hybrid layer of graphene–WS2 is designed to develop a sensitive biosensor for deoxyribonucleic acid detection. The biosensor incorporates a 45 nm gold layer as the active layer and a thin film of chrome as the adhesive layer. Through the optimization of the graphene and WS2 layers, combined with the implementation ..read more
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Photonics, Vol. 11, Pages 547: Low-Power-Consumption and Broadband 16-Channel Variable Optical Attenuator Array Based on Polymer/Silica Hybrid Waveguide
MDPI » Photonics
by Shengyuan Zhang, Yuexin Yin, Zihao Wang, Yafan Li, Yuan Zhang, Mengke Yao, Daming Zhang, Ye Li
4d ago
Photonics, Vol. 11, Pages 547: Low-Power-Consumption and Broadband 16-Channel Variable Optical Attenuator Array Based on Polymer/Silica Hybrid Waveguide Photonics doi: 10.3390/photonics11060547 Authors: Shengyuan Zhang Yuexin Yin Zihao Wang Yafan Li Yuan Zhang Mengke Yao Daming Zhang Ye Li A variable optical attenuator (VOA) is a crucial component for optical communication, especially for a variable multiplexer (VMUX) and reconfigurable optical add-drop multiplexer (ROADM). With the capacity increasing dramatically, a large-port-count and low-power-consumption VOA array is urgent for an on-chi ..read more
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Photonics, Vol. 11, Pages 548: Temporal Analysis of Speckle Images in Full-Field Interferometric and Camera-Based Optical Dynamic Measurement
MDPI » Photonics
by Guojun Bai, Yuchen Wei, Bing Chen, Yu Fu
4d ago
Photonics, Vol. 11, Pages 548: Temporal Analysis of Speckle Images in Full-Field Interferometric and Camera-Based Optical Dynamic Measurement Photonics doi: 10.3390/photonics11060548 Authors: Guojun Bai Yuchen Wei Bing Chen Yu Fu Vibration measurement is crucial in fields like aviation, aerospace, and automotive engineering, which are trending towards larger, lighter, and more complex structures with increasingly complicated dynamics. Consequently, measuring a structure’s dynamic characteristics has gained heightened importance. Among non-contact approaches, those based on high-s ..read more
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Photonics, Vol. 11, Pages 544: High-Performance Terahertz Coherent Perfect Absorption with Asymmetric Graphene Metasurface
MDPI » Photonics
by Jintao Chen, Lujun Hong, Jiangtao Lei, Yun Shen, Xiaohua Deng, Jing Chen, Tianjing Guo
4d ago
Photonics, Vol. 11, Pages 544: High-Performance Terahertz Coherent Perfect Absorption with Asymmetric Graphene Metasurface Photonics doi: 10.3390/photonics11060544 Authors: Jintao Chen Lujun Hong Jiangtao Lei Yun Shen Xiaohua Deng Jing Chen Tianjing Guo In this work, we introduce a novel coherent perfect absorber, accentuating its novelty by emphasizing the broad bandwidth, reduced thickness, tunable property, and straightforward design achieved through the use of an asymmetric graphene metasurface. This design incorporates both square and circular graphene patches arranged on either side of a ..read more
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