Results 71 to 80 of about 26,576 (254)

Plasmonic Nanomachines: Creating Local Potential Gradients and Motions

Advanced Materials, EarlyView.
Plasmonic nanomachines can generate optical, thermal, and chemical potential gradients to drive directional rectilinear, rotational, and twisting motions at the nanometer scale. The integration of multimodal plasmonic forces with functional materials and programmed structural distortions enables precise spatiotemporal actuation, thereby providing a ...
Yoonhee Kim, Soohyun Ji, Donghyun Choi, Jwa‐Min Nam   +3 more
wiley   +1 more source

Influence of Subwavelength Grating Asymmetry on Long-Wavelength Infrared Transmittance Filters

IEEE Photonics Journal, 2018
Subwavelength dielectric gratings provide a means of narrowband spectral filtering by coupling to quasi-guided leaky modes, providing a high reflectivity background and narrowband transmittance via Fano resonance behavior.
Michael Barrow, Marty Scherr, Jamie Phillips   +2 more
doaj   +1 more source

Non‐Continuous Iridescent Variable Structural Color Based on Metallic Surface Periodic Structures

Advanced Materials Interfaces, EarlyView.
This study presents an ink‐free laser nanofabrication technique that generates periodic arched microstructures on titanium surfaces, achieving non‐continuous iridescent dual‐color switching. The ridge and side flanks of these structures possess distinct oxide film thicknesses, enabling angle‐dependent selective reflection of specific wavelengths.
XiangWei Liu, XiaoSong Yu, Jiao Geng, LiPing Shi   +3 more
wiley   +1 more source

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

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

Soliton frequency shifts in subwavelength structures

Journal of Optics, 2015
We investigate the soliton frequency shifts for few-cycle ultrashort laser pulses propagating through resonant media embedded within subwavelength structures, and we elucidate the underlying physics. Full-wave Maxwell?Bloch equations are solved numerically by using the finite-difference time-domain method.
Xiaohong Song, Ming Yan, Miaoli Wu, Zhihao Sheng, Zhizhen Hao, Chong Huang, Weifeng Yang   +6 more
openaire   +1 more source

Transducers Across Scales and Frequencies: A System‐Level Framework for Multiphysics Integration and Co‐Design

Advanced Materials Technologies, EarlyView.
Transducers convert physical signals into electrical and optical representations, yet each mechanism is bounded by intrinsic trade‐offs across bandwidth, sensitivity, speed, and energy. This review maps transduction mechanisms across physical scale and frequency, showing how heterogeneous integration and multiphysics co‐design transform isolated ...
Aolei Xu, Mengyao Xiao, Zhouli Sui, Yinpeng Wang, Daoye Zheng, Yuxin Liu, Luwei Wang, Huajun Liu, Chengkuo Lee   +8 more
wiley   +1 more source

Tunable Extraordinary Optical Transmission in the Long‐Wavelength Infrared Range Using Electrostatic MEMS Actuation

Advanced Materials Technologies, EarlyView.
A MEMS‐integrated metamaterial filter enables continuous, low‐voltage spectral tuning in the long‐wavelength infrared (LWIR). The device employs extraordinary optical transmission in a dual suspended metasurface stack, where electrostatic actuation precisely controls the intermembrane air gap.
Oleg Bannik, Fedor Kovalev, Michal Zawierta, Dilusha Silva, Lorenzo Faraone, Ilya Shadrivov, Mariusz Martyniuk   +6 more
wiley   +1 more source

Infrared Absorption Efficiency Enhancement of the CMOS Compatible Thermopile by the Special Subwavelength Hole Arrays

Applied Sciences, 2020
The infrared absorption efficiency (IAE) enhancement of the complementary-metal-oxide-semiconductorCMOS compatible thermopile with special subwavelength hole arrays in an active area was numerically investigated by the finite-difference time-domain ...
Yun-Ying Yeh, Chih-Hsiung Shen, Chi-Feng Chen   +2 more
doaj   +1 more source

Nanoscale Metamaterial Optical Waveguides with Ultrahigh Refractive Indices

, 2012
We propose deep-subwavelength optical waveguides based on metal-dielectric multilayer indefinite metamaterials with ultrahigh effective refractive indices.
Babinec, Cai, Chandran, Chen, Choi, Cui, Elser, Elser, Foss, Gan, Govyadinov, Han, Huang, Jacob, Jacob, Jiang, Jie Gao, Johnson, Lin, Liu, Liu, Lu, Meng, Noginov, Noginov, Oulton, Pendry, Pendry, Sailing He, Salandrino, Schurig, Shelby, Shen, Shi, Shin, Smith, Sun, Veselago, Xiao, Xiaodong Yang, Xu, Yan, Yang, Yang, Yao, Yao, Yingran He   +46 more
core   +1 more source