Results 121 to 130 of about 286,805 (345)

3D Nano‐architected Polymer Shell Enables Reconfigurable Stabilized Blue Phase Soft Crystals

Advanced Functional Materials, EarlyView.
Spherical polymer shells featuring nanostructure of blue phase (BP) disclinations form via in situ photo‐polymerization within BP liquid crystals, providing controlled anchoring for BP nucleation and growth at room temperature and beyond. This architected confinement enhances BP thermal stability over a broad temperature range while enabling dynamic ...
Sepideh Norouzi, Yazael R. Morales‐Flores, Tadej Emersic, Jeremy Money, Otilio E. Rodriguez‐Lopez, Andrew Casale, Juan J. de Pablo, Jose A. Martinez‐Gonzalez, Monirosadat Sadati   +8 more
wiley   +1 more source

Acoustooptic Bragg Diffraction in 2-Dimensional Photonic Crystals [PDF]

arXiv, 2008
The paper shows that silicon-based 2D photonic crystal can be a promising material for acoustooptical devices. Isotropic and anisotropic Bragg diffraction of light in photonic crystal is considered. The computational method for calculation of frequency dependences of Bragg angle is developed.
arxiv  

Quantum Emitters in Hexagonal Boron Nitride: Principles, Engineering and Applications

Advanced Functional Materials, EarlyView.
Quantum emitters in hexagonal boron nitride have emerged as a promising candidate for quantum information science. This review examines the fundamentals of these quantum emitters, including their level structures, defect engineering, and their possible chemical structures.
Thi Ngoc Anh Mai, Md Shakhawath Hossain, Nhat Minh Nguyen, Yongliang Chen, Chaohao Chen, Xiaoxue Xu, Quang Thang Trinh, Toan Dinh, Toan Trong Tran   +8 more
wiley   +1 more source

Resonant Photonic States in Coupled Heterostructure Photonic Crystal Waveguides

Nanoscale Research Letters, 2010
In this paper, we study the photonic resonance states and transmission spectra of coupled waveguides made from heterostructure photonic crystals. We consider photonic crystal waveguides made from three photonic crystals A, B and C, where the waveguide ...
Sabarinathan J, Cox JD, Singh MR
doaj   +1 more source

NanoMOF‐Based Multilevel Anti‐Counterfeiting by a Combination of Visible and Invisible Photoluminescence and Conductivity

Advanced Functional Materials, EarlyView.
This study presents novel anti‐counterfeiting tags with multilevel security features that utilize additional disguise features. They combine luminescent nanosized Ln‐MOFs with conductive polymers to multifunctional mixed‐matrix membranes and powder composites. The materials exhibit visible/NIR emission and matrix‐based conductivity even as black bodies.
Moritz Maxeiner, Ruben Maile, Murat Cuvalli, Andreas Wolf, Ayisha Komal, Robert Oestreich, Christoph Janiak, Karl Mandel, Alexander Knebel, Klaus Müller‐Buschbaum   +9 more
wiley   +1 more source

Angle-dependent structural colors in a nanoscale-grating photonic crystal fabricated by reverse nanoimprint technology

Beilstein Journal of Nanotechnology, 2019
The structural color of angle-sensitive photonic crystals has attracted great interest because of a possible application in visual sensors. The appearance of a photonic crystal is mainly influenced by the optical properties, structural parameters and the
Xu Zheng, Qing Wang, Jinjin Luan, Yao Li, Ning Wang, Rui Zhang   +5 more
doaj   +1 more source

Tubular optical microcavities based on rolled-up photonic crystals

APL Photonics, 2020
The self-rolling of micro-structured membranes via the stress-engineering method opens new ways to create 3D photonic micro-objects with original designs and optical properties. This article validates this approach by producing 3D hollow micro-resonators
Rémi Briche, Aziz Benamrouche, Pierre Cremillieu, Philippe Regreny, Jean-Louis Leclercq, Xavier Letartre, Alexandre Danescu, Ségolène Callard   +7 more
doaj   +1 more source

Integration of Perovskite/Low‐Dimensional Material Heterostructures for Optoelectronics and Artificial Visual Systems

Advanced Functional Materials, EarlyView.
Heterojunctions combining halide perovskites with low‐dimensional materials enhance optoelectronic devices by enabling precise charge control and improving efficiency, stability, and speed. These synergies advance flexible electronics, wearable sensors, and neuromorphic computing, mimicking biological vision for real‐time image analysis and intelligent
Yu‐Jin Du, Junjie Yang, Ziyu Lv, Yongbiao Zhai, Zezhuang Yi, Yuhui Xie, Ming‐Lin Zheng, Xiangyu Ma, Guodong Gong, Yan Wang, Ye Zhou, Su‐Ting Han   +11 more
wiley   +1 more source

Self-assembled tunable photonic hyper-crystals [PDF]

Scientific Reports 4, 5706 (2014), 2013
We demonstrate a novel artificial optical material, a photonic hyper-crystal, which combines the most interesting features of hyperbolic metamaterials and photonic crystals. Similar to hyperbolic metamaterials, photonic hyper-crystals exhibit broadband divergence in their photonic density of states due to the lack of usual diffraction limit on the ...
arxiv  

Fractal Photonic Crystal Waveguides

, 2004
We propose a new class of one-dimensional (1D) photonic waveguides: the fractal photonic crystal waveguides (FPCWs). These structures are photonic crystal waveguides (PCWs) etched with fratal distribution of grooves such as Cantor bars.
Bertolotti, Bertolotti, Carlos J. Zapata-Rodríguez, Chiadini, Enrique Silvestre, Jaggard, Joannopoulos, Juan A. Monsoriu, Krauss, Krauss, Lavrinenko, Lehman, Mandelbrot, Monsoriu, Monsoriu, Monsoriu, Monsoriu, Saavedra, Silvestre, Silvestre, Trabocchi, Walter D. Furlan, Zhukovsky   +22 more
core   +1 more source