Article
Chemistry, Multidisciplinary
Ting Hai, Guoqiang Xie, Jie Ma, Hezhu Shao, Zhen Qiao, Zhipeng Qin, Yue Sun, Fengqiu Wang, Peng Yuan, Jingui Ma, Liejia Qian
Summary: The lack of reliable optical switches is the main limitation for developing pulsed lasers in the deep mid-infrared region. This study demonstrates that topological semimetal antimonene has an ultrabroadband optical switch characteristic, showing potential for extending pulsed lasers into the deep mid-infrared region.
Review
Optics
Yani Zhang, Kexin Wu, Zhe Guang, Bo Guo, Dun Qiao, Zhiyi Wei, Hongyan Yang, Qiuyang Wang, Kang Li, Nigel Copner, Xiaohui Li
Summary: This paper presents a comprehensive review of recent progress on 2-4 μm mid-infrared ultrafast fiber lasers, including their mode-locking mechanisms, gain media, and system performance. The review focuses on the use of 2D material passive mode-locking for generating ultrafast pulses in this wavelength range. Additionally, the paper explores novel advances in mode-locking and gain fibers of mid-IR ultrafast fiber lasers, and discusses the current and prospective applications of such laser systems.
LASER & PHOTONICS REVIEWS
(2023)
Article
Physics, Multidisciplinary
Qi Han, Yadong Jiang, Jiayue Han, Xiang Dong, Jun Gou
Summary: Black phosphorous, with layer-dependent direct band gap and good absorption coefficient, is believed to offer superior contribution in broadband photodetectors compared to graphene. This study designed and explored a protective black phosphorous sheet for analyzing its photosensitive mechanism, revealing its diverse photoelectric features at different wavelengths.
FRONTIERS IN PHYSICS
(2021)
Article
Instruments & Instrumentation
Bu-Dong Xu, Mengmeng Zhao, Yanming Xu, Xiaofeng Zhu, Yong-Qin Li, Jinlong Xu
Summary: The use of multi-layer antimonene has been demonstrated to enhance the stability of passive Q-switched bulk lasers, addressing the issue of low stability induced by the deterioration of saturable absorber under long-time laser excitation.
INFRARED PHYSICS & TECHNOLOGY
(2023)
Article
Chemistry, Analytical
Nicolas Sobanski, Bela Tuzson, Philipp Scheidegger, Herbert Looser, Christoph Hueglin, Lukas Emmenegger
Summary: This study presents a custom field-deployable direct absorption laser spectrometer for in situ atmospheric HNO3 measurements. Detailed laboratory characterizations were conducted to evaluate the instrument's response under tropospheric conditions, and a three-week field measurement campaign was carried out to monitor the HNO3 level in ambient air.
Article
Biochemical Research Methods
Hidehiko Honda, Masato Yamamoto, Satoru Arata, Hirokazu Kobayashi, Masahiro Inagaki
Summary: This study identified two wavenumber regions by recording the infrared absorption spectra of gases surrounding Staphylococcus aureus, using a decision tree-based machine learning algorithm for classification. The results demonstrate the potential effectiveness of using absorbance measurement within these wavenumber regions to detect Staphylococcus aureus.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Dongdong Xu, Fenping Cui, Gaige Zheng
Summary: A tunable metamaterial absorber in the mid-infrared regime was theoretically investigated, revealing that the combination of inlaid metal-medium dielectric waveguide mode and resonant cavity mode, as well as excitation of propagating surface plasmon mode, are the main reasons for triple-band high absorption. Through reversible phase transitions, the transition from high absorption to high reflection in the mid-infrared region was achieved, with near unity absorption efficiency maintained by incidence angles up to 60 degrees.
Article
Optics
M. I. N. G. L. U. LI, P. I. N. G. Bai, C. H. A. N. G. Yan, S. I. Y. I. N. G. Peng
Summary: Mid-infrared dielectric metasurfaces offer potential for integrated sensing with high sensitivity, compositional selectivity, and low loss. A silicon metasurface with resonance properties in the mid-infrared region and a volume enhancement of up to 9 times was designed and fabricated. The detection limit of solutions of tungsten hexacarbonyl molecules was found to be 1 mg/mL without surface enrichment treatment. Volume field enhancement analysis rationalized the detection limit at the molecule-nanostructure interface. The results suggest that mid-infrared silicon metasurfaces may be suitable for integration with microfluidic devices for in vivo detection.
Article
Optics
Yujie Cai, Yu Chen, Xiaoning Xin, Kun Huang, E. Wu
Summary: This study demonstrates a broadband mid-infrared (MIR) single-photon frequency upconversion spectroscopy method. By utilizing the temporal-spectral quantum correlation of non-degenerate photon pairs, the signal is extracted from the noise caused by strong pump, achieving single-photon-level MIR spectral measurement. The system features non-destructive and robust operation, making it an appealing option for biochemical applications.
PHOTONICS RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Yuanhao Zhao, Mengyu Zong, Jie Zheng, Zhen Zhang, Qianqian Peng, Shouzhen Jiang, Jie Liu, Jingjing Liu, Liangbi Su
Summary: In this study, we successfully demonstrated a passively Q-switched laser with indium tin oxide nanowire arrays as an optical modulator. The experimental results showed that the laser achieved good performance at a wavelength of 2.8 mu m, indicating that indium tin oxide nanowire arrays have the potential to be a competitive candidate for saturable absorbers in the field of mid-infrared solid-state lasers.
Article
Engineering, Electrical & Electronic
Caihong Teng, Jihua Zou, Xingyu Tang, Yixuan Huang, Weijie He, Wen Du, Lingzhi Luo, Aobo Ren, Jiang Wu, Zhiming Wang
Summary: This study investigates the saturable absorption of MoS2 by continuous wave lasers and demonstrates the capability of MoS2 as an activation unit for nonlinear mapping in optical deep networks (ONNs). A simulation-based fully connected neural network is fabricated for mimicking the operation of ONNs and achieving image classification. The recognition accuracy ranged from 89% to 94%, depending on the morphology of MoS2. This article provides a guideline for the selection of nonlinear units and opens up the possibility of implementing all-optical neural networks.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2023)
Article
Physics, Multidisciplinary
H. Ahmad, B. Nizamani, M. Z. Samion, N. Yusoff, M. F. Ismail
Summary: Antimonene was used as a saturable absorber to generate an ultrafast mode-locked and Q-switched laser in the 2 μm wavelength region. Two antimonene-based saturable absorbers were prepared and inserted into a thulium-holmium-doped fiber laser to produce pulsed laser. Antimonene coated onto a tapered fiber generated soliton mode-locked pulses, while thin-film antimonene was used for Q-switched pulse generation. The mode-locked laser had a pulse width of 1.3 ps and a repetition rate of 12.6 MHz, while the Q-switched laser operated at a wavelength of 1890.1 nm with a repetition rate of 56.63 kHz and a pulse width of 2.85 μs, allowing for wide-range tunability within the wavelength range of 1882 nm-1936 nm.
Article
Optics
Fuyong Yue, Riccardo Piccoli, Mikhail Y. Shalaginov, Tian Gu, Kathleen A. Richardson, Roberto Morandotti, Juejun Hu, Luca Razzari
Summary: This research demonstrates the possibility of enhancing third-harmonic generation (THG) in the mid-wave infrared (MWIR) range through designing a metasurface, with a 30-fold enhancement achieved using a highly nonlinear material Ge2Sb2Se4Te1 (GSST). GSST-based metasurfaces offer unprecedented broadband transparency, large refractive index, high nonlinear response, and unique phase-change properties, making them an attractive solution for reconfigurable and ultra-compact nonlinear devices operating in the MWIR.
LASER & PHOTONICS REVIEWS
(2021)
Article
Engineering, Electrical & Electronic
Hongfei Guan, Xiaoyu Wang, Xu Liu, Liming Yuan, Jinyi Li, Zhenhui Du
Summary: We developed a mid-infrared laser absorption sensor for simultaneous detection of CH3CN, H2O, and CH4 in the ambient air. The sensor achieved high sensitivity and selectivity, with a detection limit for CH3CN as low as 160 ppt. The sensor's small size and lightweight make it practical for continuous monitoring of ultra-low concentrations of CH3CN.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Article
Optics
Yu-Shan Chen, Dan Meng, Wen-Zhuang Ma, Wei Chen, Ping-Ping Zhuang, Wen Chen, Zhi-Chun Fan, Chao Dou, Yu Gu, Jing Liu
Summary: The proposed sensing scheme utilizes an all-dielectric grating metasurface and angular scanning of polarized light to enhance the interaction between light and analytes, enabling broadband enhancement for detecting various substances and facilitating sensing and analysis of trace substances in the mid-infrared region.