Results 51 to 60 of about 7,053 (306)

Spectrally Tunable 2D Material‐Based Infrared Photodetectors for Intelligent Optoelectronics

Advanced Functional Materials, EarlyView.
Intelligent optoelectronics through spectral engineering of 2D material‐based infrared photodetectors. Abstract The evolution of intelligent optoelectronic systems is driven by artificial intelligence (AI). However, their practical realization hinges on the ability to dynamically capture and process optical signals across a broad infrared (IR) spectrum.
Junheon Ha, Yingshan Ma, Yong Nam An, Sung‐Un An, Hyeon Hak Jung, Suvi‐Tuuli Varjamo, Jiwon Yoo, Junho Min, Hanvit Kim, Faisal Ahmed, Sang Hoon Chae, Young Min Song, Weiwei Cai, Tawfique Hasan, Zhipei Sun, Dong‐Ho Kang, Hyeon‐Jin Shin, Yunyun Dai, Hoon Hahn Yoon   +18 more
wiley   +1 more source

Temperature-Compensated Refractive-Index Sensing Using a Single Bragg Grating in an Abrupt Fiber Taper

IEEE Photonics Journal, 2013
In this paper, temperature-compensated refractive-index (RI) sensing is realized by use of a single Bragg grating inscribed in a silica microfiber. The microfiber is tapered from a single-mode fiber with two short transition regions.
Yang Ran, Long Jin, Li-Peng Sun, Jie Li, Bai-Ou Guan   +4 more
doaj   +1 more source

Multimodal Structural Color Graphics Based on Colloidal Photonic Microdome Arrays

Advanced Functional Materials, EarlyView.
A hybrid photonic system combining colloidal crystals and microscale domes is designed to achieve four switchable optical states via the interplay of Bragg reflection and TIR interference. The graphics composed of the photonic microdome arrays provide tunable, angle‐sensitive structural coloration and concealed‐to‐revealed transitions, offering a ...
Jun‐Gu Kang, Hwan‐Young Lee, Chaerim Son, Hyeonbin Jo, Shin‐Hyun Kim   +4 more
wiley   +1 more source

The Focusing Property of Immersed Plasmonic Nanolenses Under Radially Polarized Illumination

IEEE Photonics Journal, 2013
The focusing property of immersed plasmonic nanolenses was theoretically studied by a rigorous electromagnetic numerical analysis method. The immersed plasmonic nanolens consists of a through central hole surrounded by a set of concentric slits with a ...
Er-Wei Wang, Ling-Li Li, Wei-Xing Yu, Tai-Sheng Wang, Jin-Song Gao, Yong-Qi Fu, Yu-Ling Liu   +6 more
doaj   +1 more source

Recomposable Layered Metasurfaces for Wavelength‐Multiplexed Optical Encryption via Modular Diffractive Deep Neural Networks

Advanced Functional Materials, EarlyView.
Modular diffractive deep neural network metasurfaces encode and reconstruct holograms across layer combinations and wavelengths, enabling secure, multifunctional operation. Each layer acts independently yet composes jointly, yielding up to m(2N −1) channels for m wavelengths and N layers.
Cherry Park, Youngsun Jeon, Seokho Lee, Yeseul Kim, Junsuk Rho   +4 more
wiley   +1 more source

Three‐Dimensional Hierarchical Nanowire‐Networks with Deep‐Focus Tolerance and Adhesion Robustness for Harsh‐Environment SERS Sensing

Advanced Functional Materials, EarlyView.
A 3D nanowire‐network SERS substrate with robust adhesion is developed, featuring pronounced z‐direction optical activity, ultralow detection limit (1.5 × 10−13 M), and excellent signal uniformity (RSD < 10%). Enabled by enhanced light scattering, increased optical density of states, and structural reinforcement, the substrate demonstrates stable, high‐
Jinglai Duan, Wentao Wang, Xiu Liang, Yongliang Zhang, Jie Liu, Yu Bai, Dangyuan Lei   +6 more
wiley   +1 more source

Guided-Mode Resonances in GaN Membrane Grating

IEEE Photonics Journal, 2014
This paper proposes guided-mode resonant GaN grating that are implemented on a GaN-on-silicon wafer structure. Numerical simulations based on rigorous coupled wave analysis (RCWA) are performed to model multiple resonances in thick GaN membranes.
Zheng Shi, Xumin Gao, Xin Li, Fangren Hu, Martin Lopez-Garcia, Martin J. Cryan, Hongbo Zhu, Yongjin Wang   +7 more
doaj   +1 more source

Bloch Surface Wave Assisted Structured Illumination Microscopy for Sub-100 nm Resolution

IEEE Photonics Journal, 2021
Structured illumination microscopy (SIM) is one of the most powerful and versatile super-resolution methods due to its live-cell imaging ability of subcellular structures with high speed.
Weijie Kong, Changtao Wang, Mingbo Pu, Xiaoliang Ma, Xiong Li, Xiangang Luo   +5 more
doaj   +1 more source

Competition between subwavelength and deep-subwavelength structures ablated by ultrashort laser pulses

Optica, 2017
Femtosecond laser-induced periodic subwavelength and deep-subwavelength structures (SWS; DSWS) have attracted attention due to their subdiffraction resolution of surface and inner volume patterning. Understanding of the richness of laser–matter interaction during formation of SWS and DSWS is another quest which can help to find control for nanoscale ...
Lei Wang, Bin-Bin Xu, Xiao-Wen Cao, Qian-Kun Li, Wen-Jing Tian, Qi-Dai Chen, Saulius Juodkazis, Hong-Bo Sun   +7 more
openaire   +2 more sources

Subwavelength Grating Structures in Silicon‐on‐Insulator Waveguides [PDF]

Advances in Optical Technologies, 2008
First implementations of subwavelength gratings (SWGs) in silicon‐on‐insulator (SOI) waveguides are discussed and demonstrated by experiment and simulations. The subwavelength effect is exploited for making antireflective and highly reflective waveguide facets as well as efficient fiber‐chip coupling structures.
Schmid, Jens, Cheben, Pavel, Janz, Siegfried, Lapointe, J., Post, Edith, Delâge, André, Densmore, Adam, Lamontagne, Boris, Waldron, Philip, Xu, D. -X.   +9 more
openaire   +1 more source