Results 91 to 100 of about 545,254 (302)

Band gap engineering in simultaneous phononic and photonic crystal slabs [PDF]

, 2010
We discuss the simultaneous existence of phononic and photonic band gaps in two types of phononic crystals slabs, namely periodic arrays of nanoholes in a Si membrane and of Si nanodots on a SiO2 membrane. In the former geometry, we investigate in detail
Pennec, Yan, ElHassouani, Y., Akjouj, A., Y. Hassouani, A. Akjouj, Bria, D., Vasseur, J., E. H. Boudouti, ElBoudouti, EH, Y. Pennec, Djafari Rouhani, Bahram, Li, Chanseng, J. O. Vasseur, C. Li, D. Bria, B. Djafari Rouhani, El Hassouani, Youssef, Djafari-Rouhani, Bahram, El Boudouti, El Houssaine, Vasseur, Jerome O., Li, C., Bria, Driss, Akjouj, Abdellatif   +22 more
core   +1 more source

Limits to the Hall Effect and Other Nonreciprocal Effects in Three‐Dimensional Metamaterials

Advanced Materials, EarlyView.
Comprehensive and fundamental bounds on nonreciprocal effects in three‐dimensional metamaterials are derived. They reveal that the effective Hall mobility cannot exceed the largest constituent mobility, that, under certain conditions, the Verdet constant cannot be enhanced, and that, for constituents with Hall coefficients of the same sign, the largest
Christian Kern, Graeme W. Milton
wiley   +1 more source

All-optical 3D blue phase photonic crystal switch with photosensitive dopants

Scientific Reports
Blue phase (BP) liquid crystals (LC) have lately become the focus of extensive research due to their peculiar properties and structure. BPs exhibit a highly organized 3D structure with a lattice period in the hundreds of nm.
Eva Oton, Martin Cigl, Przemysław Morawiak, Sergei Mironov, Alexej Bubnov, Wiktor Piecek   +5 more
doaj   +1 more source

One-Step Combined-Nanolithography-and-Photolithography for a 2D Photonic Crystal TM Polarizer

Micromachines, 2014
Photonic crystals have been widely investigated since they have great potential to manipulate the flow of light in an ultra-compact-scale and enable numerous innovative applications.
Kyung-Hak Choi, Jinwoo Huh, Yonghao Cui, Krutarth Trivedi, Walter Hu, Byeong-Kwon Ju, Jeong-Bong Lee   +6 more
doaj   +1 more source

Role of the Recombination Zone in Organic Light‐Emitting Devices

Advanced Materials, EarlyView.
This review summarizes the critical role of the recombination zone in organic light‐emitting diodes (OLEDs). We highlight that broadening the recombination zone in OLEDs based on emissive layers with balanced charge transport and high photoluminescence quantum yields provides a promising route toward achieving both long operational lifetime and high ...
Yungui Li, Karl Leo
wiley   +1 more source

Broadband photonic topological insulator based on triangular-holes array with higher energy filling efficiency

Nanophotonics, 2020
Photonic topological insulators (PTIs) bring markedly new opportunities to photonic devices with low dissipation and directional transmission of signal over a wide wavelength range due to the broadband topological protection. However, the maximum gap/mid-
Zhang Zhishen, Li Feng, Lu Jiuyang, Liu Tao, Heng Xiaobo, He Yongcheng, Liang Haohua, Gan Jiulin, Yang Zhongmin   +8 more
doaj   +1 more source

Single‐Chromophore Homojunction Organic Solar Cells: A Path to Simplicity and Efficiency

Advanced Materials, EarlyView.
This perspective discusses how the intrinsic optoelectronic properties of organic semiconductors, their molecular packing in the solid‐state, and internal energetic gradients within a device can enable free‐charge carrier generation in homojunction organic solar cells.
Shaun McAnally, Paul L. Burn, Paul E. Shaw   +2 more
wiley   +1 more source

Transparent Perovskite Light‐Emitting Diodes with Conductive Oxide Top Electrodes

Advanced Materials, EarlyView.
Transparent perovskite light‐emitting diodes (TrPeLEDs) enable simultaneous display and transparency, expanding application possibilities. Using a metal oxide buffer layer and pulsed laser deposition, TrPeLEDs with diverse compositions and architectures are demonstrated.
Michele Forzatti, Sergio Martínez‐Saiz, Morena Cervino, Edoardo Stanzani, Sandra Jenatsch, Qingsen Zeng, Joo Sung Kim, Dong‐Hyeok Kim, Eojin Yoon, Tae‐Woo Lee, Daniel Tordera, Henk J. Bolink   +11 more
wiley   +1 more source

Electromagnetic wave control of ceramic/resin photonic crystals with diamond structure

Science and Technology of Advanced Materials, 2004
Millimeter-order photonic crystals with the periodic arrangement of the dielectric constant were fabricated by infiltrating the mixed slurry of ceramics and polyester into the epoxy molds with an inverse form of a diamond structure.
Soshu Kirihara, Mitsuo Takeda, Kazuaki Sakoda and Yoshinari Miyamoto
doaj  

Engineering fragile topology in photonic crystals: Topological quantum chemistry of light

Physical Review Research, 2019
In recent years, there have been rapid advances in the parallel fields of electronic and photonic topological crystals. Topological photonic crystals in particular show promise for coherent transport of light and quantum information at macroscopic scales.
María Blanco de Paz, Maia G. Vergniory, Dario Bercioux, Aitzol García-Etxarri, Barry Bradlyn   +4 more
doaj   +1 more source