Results 41 to 50 of about 78,837 (291)

Epitaxial growth of aligned semiconductor nanowire metamaterials for photonic applications [PDF]

, 2008
A novel class of optical metamaterials is presented consisting of high densities of aligned gallium phosphide (GaP) nanowires fabricated using metal-organic vapor phase-epitaxy.
Bakkers, Bohren, Born, Burnett, De Heer, Doron-Mor, Engheta, Genereux, Givargizov, Gross, Hochbaum, Kosaka, Kotlyar, Künzner, Law, Li, Lin, Liu, Létant, Muskens, Muskens, Mårtensson, Palik, Pauzauskie, Peeters, Stewart, Tian, Tong, Verheijen, Wagner, Wang, Weber, Xi, Xu   +33 more
core   +1 more source

First results from the new PVLAS apparatus: a new limit on vacuum magnetic birefringence

, 2014
Several groups are carrying out experiments to observe and measure vacuum magnetic birefringence, predicted by Quantum Electrodynamics (QED). We have started running the new PVLAS apparatus installed in Ferrara, Italy, and have measured a noise floor ...
Della Valle, F., Ejlli, A., Gastaldi, U., Messineo, G., Milotti, E., Pengo, R., Piemontese, L., Ruoso, G., Zavattini, G.   +8 more
core   +1 more source

Birefringence compensation in double-core optical waveguides [PDF]

, 1998
A new concept for birefringence compensation in planar optical waveguides applying a double-core structure is introduced. It is demonstrated on waveguides fabricated in silicon oxynitride technology for applications in optical ...
Bona, G.L., Driessen, A., Lambeck, Paul, Offrein, B.J., Offrein, B.J., Popma, T.J.A., Worhoff, Kerstin   +6 more
core   +4 more sources

Intermolecular Interactions as Driving Force of Increasing Multiphoton Absorption in a Perylene Diimide‐Based Coordination Polymer

Advanced Functional Materials, EarlyView.
This study uncovers the unexplored role of intermolecular interactions in multiphoton absorption in coordination polymers. By analyzing [Zn2tpda(DMA)2(DMF)0.3], it shows how the electronic coupling of the chromophores and confinement in the MOF enhance two‐and three‐photon absorption.
Simon Nicolas Deger, Anna Mauri, Yang Cui, Sebastian Josef Weishäupl, Ali Deniz Özdemir, Hamad Syed, Aleksandr Ovsianikov, Wolfgang Wenzel, Alexander Pöthig, Jürgen Hauer, Mariana Kozlowska, Roland Augustinus Fischer   +11 more
wiley   +1 more source

Viscoelasticity and Birefringence of Low Birefringent Polyesters [PDF]

Polymer Journal, 2000
Dynamic viscoelasticity and dynamic birefringence were investigated for a series of polyesters with various combinations of dimethyl decalin 2,6-carboxylate, DMHN and dimethyl terephthalate, DMT as acid component and 9,9-bis[4-(2-hydroxy-ethoxy)phenyl]fluorene, BPEF and ethylene glycol, EG as diol component.
Tadashi Inoue, Kazuyuki Fujiwara, Deug-Soo Ryu, Kunihiro Osaki, Michiaki Fuji, Kazuo Sakurai   +5 more
openaire   +1 more source

Reducing Polarization Mode Dispersion With Controlled Polarization Rotations [PDF]

, 2006
One of the fundamental limitations to high bit rate, long distance, telecommunication in optical fibers is Polarization Mode Dispersion (PMD). Here we introduce a conceptually new method to reduce PMD in optical fibers by carrying out controlled ...
Barlow A J, Chen X, Chen X, Galtarossa A, Galtarossa A, Galtarossa A, Hart A C Huff R G Walker K L, Li M J, Pancharatnam S, Poole C D, Poole C D, Poole C D, S Massar, S Popescu, Slichter C P   +14 more
core   +2 more sources

Modulating Two‐Photon Absorption in a Pyrene‐Based MOF Series: An In‐Depth Investigation of Structure–Property Relationships

Advanced Functional Materials, EarlyView.
This study investigates H4TBAPy‐based metal–organic frameworks (MOFs) ‐ NU‐1000, NU‐901, SrTBAPy, and BaTBAPy ‐ for multiphoton absorption (MPA) performance. It observes topology‐dependent variations in the 2PA cross‐section, with BaTBAPy exhibiting the highest activity.
Simon N. Deger, Helmy Pacheco Hernandez, Yang Cui, Hongxing Hao, Vanessa Ramm, David C. Mayer, Khai‐Nghi Truong, Roland A. Fischer, Jürgen Hauer, Mariana Kozlowska, Alexander Pöthig   +10 more
wiley   +1 more source

Tuning the Dielectric Properties of Individual Clay Nanosheets by Interlayer Composition: Toward Nano‐Electret Materials

Advanced Functional Materials, EarlyView.
The dielectric properties of clays are studied on the level of individual monolayers and functional double stacks. The material breakdown characteristics and charge storage performance are analyzed. For illustration, a defined charge pattern representing a cuneiform character is produced, written into a microscopic clay tile, referencing the origins of
Sebastian Gödrich, Paul Markus, Matthias Stöter, Bernhard Biersack, Rainer Schobert, Josef Breu, Georg Papastavrou   +6 more
wiley   +1 more source

A Hybrid Design for Frequency-Independent Extreme Birefringence Combining Metamaterials with the Form Birefringence Concept

Photonics
With advances in terahertz technology, achieving high and nearly constant birefringence over a wide frequency range plays an extreme role in many advanced applications.
Can Koral, Fulya Bagci
doaj   +1 more source

Multiple designs with broad applicability for enhancing birefringence in low-loss terahertz HC-ARF

Results in Physics, 2023
The use of hollow-core anti-resonant fiber (HC-ARF) as a transmission medium for the terahertz (THz) frequency range is attracting increasing attention from researchers. This paper introduces a low-loss, high birefringence anti-resonant fiber.
Zihan Liu, Jialin Wen, Liang Zhang, Zhengyong Zhou, Yuming Dong, Tianyu Yang   +5 more
doaj   +1 more source