Results 101 to 110 of about 12,922 (291)
High-reflectance GaInP/GaAs distributed Bragg reflector
Electronics Letters, 1993 A high-reflectance GaInP/GaAs distributed Bragg reflector (DBR) was grown by chemical beam epitaxy (CBE). The mirror consists of 40 pairs of alternating layers and was designed for a centre wavelength of 980 nm, resulting in a total thickness of 5.8 mum.
B. Saint-Cricq +3 more
openaire +1 more source
Electro‐Chemo‐Mechanical Coupling in Hf0.5Zr0.5O2 Ferroionic Heterostructures
Advanced Functional Materials, EarlyView.Schematic of a ferroionic HZO heterostructure where epitaxial interfaces enable dynamic oxygen‐vacancy exchange, coupling ionic and ferroelectric degrees of freedom. Vacancy‐mediated polarization modulation biases HZO polymorphism, suppresses leakage, and enhances piezoelectric response, yielding distinct butterfly‐loop evolution and diode‐like ...
Achilles Bergne +17 more
wiley +1 more source
Distributed Etched Diffraction Grating Demultiplexer With Flat-Top Insertion Loss Envelope
IEEE Photonics Journal, 2011 It is numerically shown that incorporation of a distributed Bragg reflector at the facets of an etched diffraction grating (EDG) can be used to tailor the output spectral response of the device.
Amir Jafari, Andrew Kirk
doaj +1 more source
Preparation and novel photoluminescence properties of the self-supporting nanoporous InP thin films
Scientific Reports, 2020 Self-supporting nanoporous InP membranes are prepared by electrochemical etching, and are then first transferred to highly reflective (> 96%) mesoporous GaN (MP-GaN) distributed Bragg reflector (DBR) or quartz substrate. By the modulation of bandgap, the
Dezhong Cao +4 more
doaj +1 more source
Telecom wavelength single quantum dots with very small excitonic fine-structure splitting
, 2018 We report on molecular beam epitaxy growth of symmetric InAs/InP quantum dots (QDs) emitting at telecom C-band (1.55 $\mu$m) with ultra-small excitonic fine-structure splitting of ~2 $\mu$eV.
Benyoucef, Mohamed +2 more
core +1 more source
Characterization of wavelength tunable lasers for future optical communication systems [PDF]
, 2010 The use of tunable lasers (TL) in dense wavelength division multiplexed (DWDM) networks for optical switching, routing and networking has gained a lot of interest in recent years.
Anandarajah, Prince M. +4 more
core +1 more source
Beyond the Edge: Charge‐Transfer Excitons in Organic Donor‐Acceptor Cocrystals
Advanced Functional Materials, EarlyView.Complex excitonic landscapes in acene–perfluoroacene cocrystals are unveiled by polarization‐resolved optical spectroscopy and many‐body theory. This systematic study of a prototypical model system for weakly interacting donor–acceptor compounds challenges common views of charge‐transfer excitons, providing a refined conceptual framework for ...
Sebastian Anhäuser +6 more
wiley +1 more source
High Performance GaSb-Based DBR Laser with On-Chip Integrated Power Amplifier via Gain-Match Design
Applied SciencesWe reported on a single-longitudinal-mode operated distributed Bragg reflector laser diode emitting at 1950 nm with an on-chip integrated power amplifier.
Juntian Cao +13 more
doaj +1 more source
Propagation of Light in Photonic Crystal Fibre Devices
, 2005 We describe a semi-analytical approach for three-dimensional analysis of photonic crystal fibre devices. The approach relies on modal transmission-line theory. We offer two examples illustrating the utilization of this approach in photonic crystal fibres:
Akbari M +18 more
core +1 more source
Advanced Functional Materials, EarlyView.Molecularly engineered memristors integrating Ag nanoparticle–embedded synthetic DNA with quasi‐2D halide perovskites enable ultra‐low‐operational voltage, forming‐free resistive switching, and record‐low power density. This synergistic integration of customized DNA and 2D OHP in bio‐hybrid architecture enhances charge transport, reduces variability ...
Kavya S. Keremane +9 more
wiley +1 more source