Results 31 to 40 of about 8,903 (251)

Near‐Unity Chiral Lasing Enabled by Quasi‐Bound States in the Continuum

Advanced Materials, EarlyView.
Nanoimprinted chiral array that supports bound states in the continuum is doped with an efficient non‐chiral molecule (Rhodamine‐B) acting as gain medium to produce fully circularly polarized lasing emission. The chiral lasing wavelength can be tuned across the emission band of Rhodamine‐B by adjusting the coating thickness of the TiO2 high refractive ...
Jose Mendoza‐Carreño, Luis A. Pérez, Carlota Ruiz De Galarreta, Théo Rouanet, M. Isabel Alonso, Agustín Mihi   +5 more
wiley   +1 more source

Nonlocal Metaspire: A Scalable Elastic Material Platform With Decoupled Mechanical Modes

Advanced Materials, EarlyView.
Nonlocal Metaspire introduces sequential rotation to realize wider scalability in implementing complex nonlocal couplings in elastic metamaterials while suppressing unintended mode coupling. Numerical results clarify the underlying wave motions, demonstrate mode‐decoupled roton and maxon formation, and support a straightforward extension to higher ...
Seung Han Kim, Myung Hwan Bae, Ye Jeong Shin, Joo Hwan Oh   +3 more
wiley   +1 more source

Lessons from nature: biomimetic subwavelength structures for high-performance optics

, 2011
In nature, optical structures in the subwavelength range have been evolved over millions of years. For example, in the form of ‘moth-eye’ structures they show a strong antireflective effect on the compound eyes of night-active insects and therefore offer
C. Pacholski, R. Brunner, Brunner, R., J. Spatz, Sandfuchs, O., Morhard, C., O. Sandfuchs, C. Morhard, Pacholski, C., Spatz, J.   +9 more
core   +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

Stochastic subwavelength structures on polymer surfaces for antireflection purposes

, 2022
Subwavelength structures of sufficient height are capable to reduce the Fresnel reflection of surfaces. A new technique is presented to produce stochastic structures on polymer surfaces by low-pressure plasma-ion treatment, showing excellent broadband ...
Leitel, R., Munzert, P., Wendling, I., Schulz, U., Tünnermann, A., Kaiser, N.   +5 more
core  

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

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

Merging plasmonics and metamaterials by two-dimensional subwavelength structures

, 2017
Functional plasmonic 2D subwavelength structures are reviewed in a new framework of modes exchanging between freely propagating and bound waves.
Xiaoliang Ma, Xiangang Luo, Mingbo Pu, Xiong Li, Yinghui Guo   +4 more
core   +1 more source

Subwavelength Silicon Photonics

, 2021
Subwavelength gratings refer to periodic structures that have a period less than half the wavelength of light in the material so that no Bragg diffraction mode is supported.
Xia Chen, Hon Ki Tsang, Tsang, Hon Ki, Chen, Xia, Zhenzhou Cheng, Zhou, Wen, Cheng, Zhenzhou, Yeyu Tong, Tong, Yeyu, Wen Zhou, Zhou, W.   +10 more
core   +1 more source

Spacer‐Less Substrate‐Integrated Metasurface for Near‐Unity Terahertz Absorption

Advanced Optical Materials, EarlyView.
ABSTRACT Although conventional metal‐insulator‐metal (MIM) terahertz (THz) absorbers can provide near‐unity absorption, their multilayer stacks inevitably introduce additional thickness, mass, and residual stress, which limit their compatibility with THz thermal sensing platforms.
Zihao Zhao, Kazuho Harada, Qian Liu, Isao Morohashi, Xu Fang, Kazuhiko Hirakawa, Ya Zhang   +6 more
wiley   +1 more source