Results 91 to 100 of about 15,815 (311)

Photonic Crystal Waveguide Based on 2-D Photonic Crystal With Absolute Photonic Band Gap [PDF]

, 2006
We propose an air-hole-type photonic crystal (PC) waveguide which can support both TE and TM waves. In order to realize such a waveguide, we employ a compound-type PC with absolute photonic bandgap and introduce a line defect with elliptical air holes ...
Morita, Yuki, Tsuji, Yasuhide, Hirayama, Koichi   +2 more
core   +1 more source

Metallic Spiral Three-Dimensional Photonic Crystal with a Full Band Gap at Optical Communication Wavelengths

IEEE Photonics Journal, 2012
The optical properties of a gold spiral photonic crystal (PC) were studied numerically and a full 3-D band gap at near infrared wavelengths was found. This band gap, ranging from 1.2 to 1.8 m in wavelength, covers all the second and third telecom windows
Po Sun, John D. Williams
doaj   +1 more source

3D Printing Innovations in Polymeric Porous and Patterned Architecture

Advanced Functional Materials, EarlyView.
Polymeric foams occupy a unique structural space between dense solids and open networks, where engineered void fraction governs mechanical compliance, thermal resistance, and mass transport. Additive manufacturing now enables precise spatial control over cellular architecture, unlocking designer foam structures across applications spanning crash ...
Dhanush Patil, Sri Vaishnavi Thummalapalli, Clarissa Westover, Arunachalam Ramanathan, M. Taylor Sobzcak, Roumika Patil, Qixuan Xiang, Tiantian Li, Sui Yang, Timothy E. Long, Hongyue Sun, Xianqiao Wang, Yang Liu, Kenan Song   +13 more
wiley   +1 more source

Three-dimensional photonic band gap cavity with finite support: Enhanced energy density and optical absorption [PDF]

, 2019
We study numerically the confinement of light in a three-dimensional (3D) photonic crystal cavity in a diamondlike inverse-woodpile structure. We present a versatile field-field cross-correlation method to identify resonances in the finite-support ...
D. Devashish, Ojambati, O. S., O. S. Ojambati, Ojambati, Oluwafemi S., van der Vegt, Jaap J.W., J. J. W. van der Vegt, Van Der Vegt, J. J.W.; id_orcid, Devashish, D., Willem L. Vos, Shakeeb B. Hasan, Hasan, Shakeeb B., van der Vegt, Jaap J.W.; id_orcid, Van Der Vegt, J. J.W., Vos, Willem L.   +13 more
core   +1 more source

Quantifying Subsurface Weak in‐Plane Magnetization of Mixed Phase BiFeO3 by Scanning Nitrogen Vacancy Magnetometry

Advanced Functional Materials, EarlyView.
We use scanning nitrogen vacancy magnetometry to directly image the weak in‐plane magnetic moments in mixed phase BiFeO3 at the nanoscale and quantify the local magnetic moments to be 18.8±2.0 μB/nm2 in the rhombohedral‐like phase and 1.5±0.6 μB/nm2 in the well‐known non‐magnetic tetragonal‐like phase.
Lei Wang, Zhewen Xu, Yuwen Xu, Björn Josteinsson, Simon Josephy, Dawei Zhang, Yunlong Sun, Heung‐Sik Park, Jihun Kim, Kanghyun Chu, Kyung Song, Danyang Wang, Chan‐Ho Yang, Andrea Morales, Jan Seidel   +14 more
wiley   +1 more source

Photonic band gap properties of one-dimensional photonic quasicrystals containing Nematic liquid crystals

Results in Physics, 2020
Reflectance spectra of one-dimensional periodic multilayered stacks with anisotropic defect layer built according to the Generalized Thue Morse sequence is investigated by the theoretical transfer matrix method for both polarized waves.
Y. Trabelsi, N. Ben Ali, Francis Segovia-Chaves, Herbert Vinck Posada   +3 more
doaj   +1 more source

Template‐Confined Synthesis of Shape‐Engineered Single‐Crystal Gold Microplates in Lithographically‐Defined Polymeric Patterns

Advanced Functional Materials, EarlyView.
Single‐crystal gold microplates are high‐performance nanomaterials with an impressive wafer‐based application space. Progress has, however, been tempered by an inability to exert synthetic control over microplate size, shape, and positioning. In this work, control over these parameters is demonstrated using a seed‐mediated synthesis that both confines ...
Debasish Panda, Md Rashed Nizam, Walker J. Tuff, Collin C. Wyant, Maksym Zhukovskyi, Matthew R. Rosenberger, Botond Sánta, Edward C. Kinzel, Robert A. Hughes, Svetlana Neretina   +9 more
wiley   +1 more source

Design and characterisation of photonic quasicrystals from microwave to optical regime

, 2010
Photonic band-gap materials are artificially periodic engineered materials with which we can control and manipulate the electromagnetic radiation. The period photonic crystals are well known and have been studied for the last two decades.
Thankamani, Priya Rose
core  

Transmission measurement of the photonic band gap of GaN photonic crystal slabs [PDF]

, 2008
A high-contrast-ratio (30 dB) photonic band gap in the near-infrared transmission of hole-type GaN two-dimensional photonic crystals (PhCs) is reported. These crystals are deeply etched in a 650 nm thick GaN layer grown on sapphire.
Salemink, H.W.M., Rong, B. (author), Roeling, EM Erik, Hoang M. Nguyen, Rogge, S, Heijden, van der, R.W., Nguyen, H.M., Van der Heijden, R.W., Karouta, F Fouad, Heijden, RW Rob van der, B. Rong, H. W. M. Salemink, S. Rogge, Salemink, HWM, Caro, J. (author), Van der Drift, E.W.J.M. (author), Roeling, E.M. (author), E. W. J. M. van der Drift, Van der Heijden, R.W. (author), J. Caro, Rong, B, Rong, B., Drift, EWJM van der, Van der Drift, E.W.J.M., Rogge, S., Karouta, F, Drift, van der, E.W.J.M., Salemink, H.W.M. (author), Roeling, E. M, van der Heijden, Rob W., Karouta, F., F. Karouta, Nguyen, Hoang M, Salemink, H. W. M, E. M. Roeling, Nguyen, H.M. (author), Karouta, F. (author), Caro, J., Caro, J, R. W. van der Heijden, Roeling, E.M., van der Drift, E., Rogge, S. (author), Nguyen, HM   +43 more
core   +1 more source

Designed Lewis Acid–Base Passivation for High Performance Perovskite Solar Cells

Advanced Functional Materials, EarlyView.
ABSTRACT Silicon's high cost and long energy payback time remain major barriers to the global expansion of solar power. In contrast, metal–halide perovskites offer abundant, solution‐processable absorbers, and have achieved efficiencies of 25%–30%, positioning them as strong competitors to silicon.
Afna Manaf, Hiba Shahulhameed, Bhabani Sankar Swain, Shengzhong (Frank) Liu, Adel Najar   +4 more
wiley   +1 more source