Results 31 to 40 of about 3,742 (297)
High-Efficiency focusing grating coupler with distributed Bragg reflector
, 2023 We propose a high-efficiency silicon nitride focusing grating coupler with a bottom reflector. The bottom reflector consists of a distributed Bragg reflector (DBR) with a stack of Si3N4 and SiO2 layers.
Li xiangyu (14805472) +5 more
core +1 more source
Flexible Distributed Bragg Reflectors from Nanocolumnar Templates
Advanced Optical Materials, 2015 A flexible distributed Bragg reflector is made by the infiltration of a nanocolumnar array with polydimethyl siloxane oligomers. The high optical reflectance displayed by the final material is a direct consequence of the high refractive index contrast of the columnar layers whereas the structural stability is due to the polymer properties.
Mauricio E. Calvo +6 more
openaire +5 more sources
High-efficiency, low-cost distributed Bragg reflector based on Al2O3/PbZr0.4Ti0.6O3 multilayer
AIP Advances, 2020 Ferroelectric oxides are kinds of materials for construction of tunable photonic crystals with remarkable electro-optical properties. However, it is a challenge to prepare high quality dielectric mirrors consisting of ferroelectric and dielectric ...
Shimin Li +4 more
doaj +1 more source
Ka-band relativistic diffraction generator with a tapered coaxial Bragg reflector
AIP Advances, 2017 A coaxial line with periodically tapered inner rode corrugated ripples is introduced to act as a distributed Bragg reflector to increase output microwave power of relativistic diffraction generator (RDG).
Feng Lan +6 more
doaj +1 more source
Distributed Bragg Reflectors for GaN-Based Vertical-Cavity Surface-Emitting Lasers
Applied Sciences, 2019 A distributed Bragg reflector (DBR) is a key building block in the formation of semiconductor microcavities and vertical cavity surface emitting lasers (VCSELs). The success in epitaxial GaAs DBR mirrors paved the way for the ubiquitous deployment of III-
Cheng Zhang, Rami ElAfandy, Jung Han
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Electronics Letters, 2023 The improvement of the performance of a distributed Bragg reflector laser bar emitting near 905 nm through the use of multiple epitaxially stacked active regions and tunnel junctions is reported. The bar consisting of 48 emitters (each having an aperture
Nor Ammouri +7 more
doaj +1 more source
ETRI Journal, 2023 We report an electroabsorption modulator (EAM)-integrated distributed Bragg reflector laser diode (DBR-LD) capable of supporting a high data rate and a wide wavelength tuning.
Oh-Kee Kwon, Chul-Wook Lee, Ki-Soo Kim
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Analysis of self-pulsating three-section DBR lasers [PDF]
, 2005 The characteristics of a three-section distributed Bragg reflector laser showing self-pulsation have been analyzed using a large signal time-domain traveling-wave simulator. The device dynamic properties have been investigated in all their complexity and
Bardella, Paolo, Montrosset, Ivo
core +1 more source
Quantum-Dot Photonic-Crystal Surface-Emitting Lasers with Bottom Distributed Bragg Reflector
Photonics, 2018 Quantum-dot (QD) photonic-crystal (PC) surface-emitting laser (SEL) devices with bottom distributed Bragg reflector (DBR) were fabricated based on vertical-cavity SEL structure with top DBR completely removed.
Ming-Yang Hsu, Gray Lin
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IEEE Journal of Microwaves, 2021 We present a 2-port terahertz vector network analyzer (VNA) based on four continuous-wave (CW) photomixers and a pair of telecom-wavelength CW lasers. The presented optoelectronic VNA is free-space coupled and can operate continuously from 0.1 THz to 1 ...
Anuar D. J. Fernandez Olvera +2 more
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