Results 81 to 90 of about 3,452 (196)

Spatially Encoded Polaritonic Ultra‐Strong Coupling in Gradient Metasurfaces with Epsilon‐Near‐Zero Modes

Advanced Materials, Volume 38, Issue 1, 2 January 2026.
Dielectric dual gradient metasurfaces supporting quasi‐bound‐states‐in‐the‐continuum are leveraged to spatially encode both the spectral and coupling parameter space and demonstrate ultra‐strong coupling to an epsilon‐near‐zero mode in an ultra‐thin SiO2 layer.The platform achieves exceptional mode overlap, reaching a normalized coupling strength of η =
Enrico Baù, Andreas Aigner, Jonas Biechteler, Connor Heimig, Thomas Weber, Thorsten Gölz, Stefan A. Maier, Andreas Tittl   +7 more
wiley   +1 more source

High-resolution 3D-printed reflective micro-collimators for facet-emitting mid-infrared lasers [PDF]

APL Photonics
Highly divergent and asymmetric beam profiles are an inherent limitation of facet-emitting mid-infrared semiconductor lasers and complicate their use in free-space optical systems.
R. Szedlak, B. Kaminski, G. Winkler, M. Traunfellner, M. Lunzer, P. Gruber, J. Nauschütz, J. Fuchsberger, M. Piotrowski, P. Kluczynski, R. Weih, B. Schwarz   +11 more
doaj   +1 more source

Ultrabroad and Wide‐Angle High‐Temperature‐Stability Infrared Metamaterial Absorber Based on All‐Dielectric Silicon Nitride (Si3N4)

Advanced Photonics Research, Volume 7, Issue 1, January 2026.
This work presents a novel all‐dielectric metamaterial absorber (MMA) consisting of vertically tapered silicon nitride (Si3N4) rods on a tungsten (W) substrate, engineered for long‐wave/ultra‐long‐wave infrared (LWIR/ULWIR) applications. Finite element method (FEM) and equivalent circuit model (ECM) simulations confirm its exceptional performance: an ...
Jiayu Jia, Yanfang Xiao, Lingling Yang, Bin Cai, Yongzhi Cheng, Hui Luo, Xiangcheng Li   +6 more
wiley   +1 more source

Mid-Infrared Tunable Laser-Based Broadband Fingerprint Absorption Spectroscopy for Trace Gas Sensing: A Review

Applied Sciences, 2019
The vast majority of gaseous chemical substances exhibit fundamental rovibrational absorption bands in the mid-infrared spectral region (2.5–25 μm), and the absorption of light by these fundamental bands provides a nearly universal means for ...
Zhenhui Du, Shuai Zhang, Jinyi Li, Nan Gao, Kebin Tong   +4 more
doaj   +1 more source

A Two‐Stage Cascading Amplification Strategy Based on Zn2+‐Doped WOX Nanozymes for Ultrasensitive Lateral Flow Immunoassays of Clostridium Difficile Toxin B

Advanced Science, Volume 13, Issue 3, 14 January 2026.
Based on the modulation of active sites and electronic structure of substrate materials, along with a colorimetric two‐stage cascading enhancement strategy, an LFIA platform with highly efficient POD‐mimetic enzymes is developed, achieving highly sensitive detection of Clostridium difficile toxin B.
Junhua Su, Zhenzhen Liu, Renjie Xiong, Renlong zhu, Zijin Tong, Yufei Liu, Rui Xiao   +6 more
wiley   +1 more source

Analytical coupled-wave model for photonic crystal quantum cascade lasers

, 2017
A coupled-wave model is developed for photonic-crystal quantum cascade lasers. The analytical model provides an efficient analysis of full three-dimensional large-area device structure, and the validity is confirmed via simulations and previous ...
Faist, Jérôme, Hu, Weiwei, Liang, Yong, Peng, Chao, Wang, Zhixin, Yin, Xuefan   +5 more
core   +2 more sources

Mid‐Infrared Free‐Space Optical Communications: Technologies, Demonstrations and Future Directions

IET Optoelectronics, Volume 20, Issue 1, January/December 2026.
Free‐space optical (FSO) communication is increasingly extending beyond the near‐infrared to the mid‐wave infrared (MWIR) and long‐wave infrared (LWIR) regions, which offer reduced turbulence, scattering and absorption for more robust links. This review summarises recent advances in MWIR/LWIR FSO technologies, including quantum cascade lasers, lithium ...
Darja Cirjulina, Zhuoyan Zhang, Abdul Hayee, Armands Ostrovskis, Richard Schatz, Hamza Dely, Yan‐Ting Sun, Toms Salgals, Sandis Spolitis, Vjaceslavs Bobrovs, Lu Zhang, Djamal Gacemi, Angela Vasanelli, Carlo Sirtori, Xianbin Yu, Oskars Ozolins, Xiaodan Pang   +16 more
wiley   +1 more source

Wavelength selection for laser design in mid-infrared spectroscopy

Frontiers in Photonics
The development of miniaturized tunable laser sources for mid-infrared (MIR) spectroscopy has enabled portable, application-specific analytical devices.
Miriam Aledda, Federico Marini, Bijay Kafle, Mehmet C. Erdem, Pranish Karki, Kristian H. Liland, Boris Zimmermann, Nils K. Afseth, Alessandra Biancolillo, Valeria Tafintseva, Kristin Tøndel, Volha Shapaval, Achim Kohler   +12 more
doaj   +1 more source

RES-Q-Trace: A Mobile CEAS-Based Demonstrator for Multi-Component Trace Gas Detection in the MIR

Sensors, 2018
Sensitive trace gas detection plays an important role in current challenges occurring in areas such as industrial process control and environmental monitoring.
Norbert Lang, Uwe Macherius, Henrik Zimmermann, Sven Glitsch, Mathias Wiese, Jürgen Röpcke, Jean-Pierre H. van Helden   +6 more
doaj   +1 more source

Breath by Breath: Navigating the Landscape of Exhaled Breath in Clinical Research and Prospects for the Future

Journal of Analytical Methods in Chemistry, Volume 2026, Issue 1, 2026.
Exhaled breath analysis (EBA) has evolved as a noninvasive diagnostic technique with enormous promise in healthcare. The development in this area is based on the concept that the breathalyzers employed to measure the alcohol concentration in the blood can be utilized to evaluate health by analyzing the intricate chemical makeup of exhaled breath, which
Nisha Parikh, Hetansh Rao, Akshada Dabhade, Vishwa Patel, Vikalp Shroff, Deep Prajapati, Palak Parikh, Ketan Ranch, B. Mahalakshmi, Shery Jacob, Sai H. S. Boddu, Maria Jose Trujillo-Rodriguez   +11 more
wiley   +1 more source