Results 31 to 40 of about 805 (182)

Performance Improvement of GaN-Based Vertical-Cavity Surface-Emitting Lasers by Using Tapered SiO₂-Buried Structure

IEEE Photonics Journal
In GaN-based vertical-cavity surface-emitting lasers (VCSELs) with insulator-buried structure, the strong index guiding will introduce higher order modes. In this paper, we present a novel GaN-based VCSEL with a tapered SiO2-buried structure by numerical
Rongbin Xu, Yachao Wang, Mingchao Fang, Yang Mei, Leiying Ying, Daquan Yu, Baoping Zhang   +6 more
doaj   +1 more source

Wideband Polarization-Resolved Chaos With Time-Delay Signature Suppression in VCSELs Subject to Dual Chaotic Optical Injections

IEEE Access, 2018
Both the polarization-resolved chaotic bandwidth enhancement and time-delay signature suppression have been numerically investigated based on a slave vertical-cavity surface-emitting laser (S-VCSEL) driven by dual chaotic optical injections (DCOIs) from ...
Jian-Jun Chen, Ying-Ni Duan, Lin-Fu Li, Zhu-Qiang Zhong   +3 more
doaj   +1 more source

Guiding and Manipulating Light Fields in Microstructured Liquid Crystals

Advanced Physics Research, EarlyView.
This review summarizes recent advances in guided‐wave optics enabled by microstructured liquid crystal (LC) devices, covering their fundamental material properties, key degree of freedom for dynamic light field manipulations. The advances of linear guided‐wave optics, nonlinear‐optics with spatial optical solitons, and microlasers in LC‐based devices ...
Shan‐shan Chang, Yong‐shuai Li, Jin‐hui Chen   +2 more
wiley   +1 more source

Flexible wearable electronics for cardiovascular monitoring from surface signals to deep physiological insights

FlexMat, EarlyView.
This review organizes flexible wearable electronics for cardiovascular monitoring into four interconnected information layers: surface electrophysiology, hemodynamic sensing, vascular imaging, and biofluid biomarker analysis. This framework clarifies how electrical rhythm, vascular loading, structural and flow‐related features, and biochemical states ...
Qiao Chen, Hongwen Chen, Yuanyuan Li, Pingan Yang, Rui Li, Zhihao Zhou   +5 more
wiley   +1 more source

Polarization bistability of vertical-cavity surface-emitting lasers under Larmor precession of electron spins

APL Photonics
Polarization bistability of vertical-cavity surface-emitting lasers (VCSELs) is the situation in which two orthogonal linear polarization states can selectively and stably exist for a single operation condition (e.g., injected current and temperature ...
Nobuhide Yokota, Kazuhiro Ikeda, Satoshi Iba, Takeo Katayama, Hiroshi Yasaka   +4 more
doaj   +1 more source

Impact of Ge Substrate Thicknesses and Epitaxy Growth Conditions on the Optical and Material Properties of Ge- and GaAs-Based VCSELs

IEEE Photonics Journal
A comparative study is presented on the dependence of optical and material properties of VCSELs on Ge and GaAs substrate thicknesses as well as epitaxy process conditions.
Wenhan Dong, Zeyu Wan, Yun-Cheng Yang, Chao-Hsin Wu, Yiwen Zhang, Rui-Tao Wen, Guangrui Xia   +6 more
doaj   +1 more source

Small-Signal Analysis of High-Performance VCSELs

IEEE Photonics Journal, 2019
In this paper, a comprehensive model to describe the small-signal modulation response of ultra-high performance single- and multi-mode vertical-cavity surface-emitting lasers (VCSELs), with modulation bandwidths exceeding 30 GHz, is presented ...
Wissam Hamad, Marwan Bou Sanayeh, Tobias Siepelmeyer, Hassan Hamad, Werner H. E. Hofmann   +4 more
doaj   +1 more source

Predicting cochlear structural alterations from auditory function in age‐related hearing loss mice based on optical coherence tomography

Journal of Intelligent Medicine, EarlyView.
Abstract With global population aging, age‐related hearing loss has become a major public health concern. Understanding the relationship between auditory functional decline and cochlear structural degeneration is essential for early detection and precise intervention.
Shu Zheng, Zhiqi Li, Junyue Wang, Guangjian Ni   +3 more
wiley   +1 more source

GaN-based Vertical-Cavity Surface-Emitting Lasers Incorporating Dielectric Distributed Bragg Reflectors

Applied Sciences, 2019
This paper reviews past research and the current state-of-the-art concerning gallium nitride-based vertical-cavity surface-emitting lasers (GaN-VCSELs) incorporating distributed Bragg reflectors (DBRs).
Tatsushi Hamaguchi, Hiroshi Nakajima, Noriyuki Fuutagawa   +2 more
doaj   +1 more source

Vision‐Augmented Wearable Interfaces: Bioinspired Approaches for Realistic AI‐Human‐Machine Interaction

Advanced Materials Technologies, Volume 11, Issue 12, 18 June 2026.
This review presents recent progress in vision‐augmented wearable interfaces that combine artificial vision, soft wearable sensors, and exoskeletal robots. Inspired by biological visual systems, these technologies enable multimodal perception and intelligent human–machine interaction.
Jihun Lee, Gwuidong Ryu, Kisoo Kim, Feng Xu, Won Gu Lee   +4 more
wiley   +1 more source