Results 51 to 60 of about 11,732 (266)

Semiclassical theory of noise in semiconductor lasers - Part I [PDF]

IEEE Journal of Quantum Electronics, 1983
A model of semiconductor laser noise is presented which includes the carrier density as a dynamical variable and the carrier density dependence of the refractive index. The Van der Pol laser noise model is shown to he a special case of this treatment. Expressions are calculated for all laser spectra and compared with their Van der Pol counterparts. The
K. Vahala, A. Yariv
openaire   +1 more source

Efficient NiOx Hole Transport Layers Enabled by Multifunctional MXenes for High‐Performance Tin‐Lead Perovskite Solar Cells

Advanced Functional Materials, EarlyView.
An efficient NiOx HTL is successfully prepared by introducing MXene as an additive without further surface modification to fabricate high‐performance FASn0.5Pb0.5I3 perovskite solar cells. The introduction of MXene contributes to improved conductivity of NiOx, better aligned at NiOx/perovskite interfaces, and enhanced quality of perovskite films ...
Lijun Chen, Guanqi Tang, Yanghou Wang, Xiaolong Cao, Junjun Jin, Jie Tang, Liyang Yu, Zheng Zhou, Peng You, Hanlin Hu, Weiqing Yang, Qidong Tai, Feng Yan   +12 more
wiley   +1 more source

Symmetry control of high-harmonic generation in bilayer hexagonal boron nitride

AIP Advances
In this study, we explored the generation of high-order harmonics in two-dimensional hexagonal boron nitride using the semiconductor Bloch equations.
Zi-Yuan Gao, Chen-Ni Wang, Zhi-Han Huan, Wan-Dong Yu, Zhi-Hong Yang, Yun-Hui Wang   +5 more
doaj   +1 more source

The Effect of Purcell Cavities on the Lifetime of Thermally Activated Delayed Fluorescent Emitters

Advanced Functional Materials, EarlyView.
A pressing challenge to OLED displays and lighting is to balance high efficiency and long operational lifetime in the deep blue spectrum. The Purcell effect can reduce the triplet density and hence the probability for destructive energy‐driven triplet annihilation events that limit the OLED lifetime. Here we study of the Purcell effect on two different
Sritoma Paul, Haonan Zhao, Collin N. Muniz, Mark E. Thompson, Stephen R. Forrest   +4 more
wiley   +1 more source

Optoelectronic–thermomagnetic effect of a microelongated non-local rotating semiconductor heated by pulsed laser with varying thermal conductivity

Open Physics
In this study, we investigated the effect of a rotation field and magnetic field on a homogeneous photo-thermoelastic nonlocal material and how its thermal conductivity changes as a result of a linearly distributed thermal load.
Raddadi Merfat H., El-Sapa Shreen, Elamin Mahjoub A., Chtioui Houda, Chteoui Riadh, El-Bary Alaa A., Lotfy Khaled   +6 more
doaj   +1 more source

Control of Polarization and Polar Helicity in BiFeO3 by Epitaxial Strain and Interfacial Chemistry

Advanced Functional Materials, EarlyView.
In BiFeO3 thin films, the interplay of interfacial chemistry, electrostatics, and epitaxial strain is engineered to stabilize homohelicity in polarization textures at the domain scale. The synergistic use of a Bi2O2‐terminated Aurivillius buffer layer and a highly anisotropic compressive epitaxial strain offers new routes to control the polar‐texture ...
Elzbieta Gradauskaite, Lilia Huynh, Natascha Gray, Quintin N. Meier, Marta D. Rossell, Morgan Trassin   +5 more
wiley   +1 more source

N, H Dual‐Doped Black Anatase TiO2 Thin Films toward Significant Self‐Activation in Electrocatalytic Hydrogen Evolution Reaction in Alkaline Media

Advanced Energy & Sustainability Research, 2022
Titanium dioxide (TiO2) is an important application‐worthy oxide semiconductor. Herein, pulsed laser deposited N, H dual‐doped black anatase TiO2 (N–H:TiO2) films grown under NH3 are examined for the electrochemical water splitting application. This case
Swati Parmar, Tisita Das, Bishakha Ray, Bharati Debnath, Suresh Gosavi, G. Shiva Shanker, Suwarna Datar, Sudip Chakraborty, Satishchandra Ogale   +8 more
doaj   +1 more source

Photoconductivity‐Driven Quantum Efficiency Gain in Inorganic Ruddlesden‐Popper Layered Cs2PbBr2I2 Perovskite Photodetector for Visible Light Detection

Advanced Functional Materials, EarlyView.
Rational halogen mixing strategy was employed to shift the bandgap of Cs2PbBr2I2 from ultraviolet to visible region, enabling first realization of a visible‐light photodetector with this 2D layered Ruddlesden‐Popper perovskite material. Under illumination, light‐induced internal field forms and drives trap‐mediated persistent photoconductivity ...
Md Fahim Al Fattah, Asif Abdullah Khan, Saikiran Khamgaonkar, Majid Haji Bagheri, Danyah Khan, Md Rasidul Islam, Mahmoud Almadoun, Aixi Pan, Alexander Li, Marwa Abd‐Ellah, Vivek Maheshwari, Dayan Ban   +11 more
wiley   +1 more source

Lithium Intercalation in the Anisotropic Van Der Waals Semiconductor CrSBr

Advanced Functional Materials, EarlyView.
We report the lithium intercalation in the layered van der Waals crystal CrSBr, revealing strongly anisotropic ion‐migration dynamics. Optical and electrical characterization of exfoliated CrSBr shows lithium diffusion coefficients that differ by more than an order of magnitude along a‐ and b‐directions, consistent with molecular dynamics simulations ...
Kseniia Mosina, Aljoscha Söll, Jiří Šturala, Martin Veselý, Petr Levinsky, Ondřej Kaman, Florian Dirnberger, Giuliana Materzanini, Nicola Marzari, Gian‐Marco Rignanese, Borna Radatović, Vlastimil Mazánek, David Sedmidubský, Zdeněk Sofer   +13 more
wiley   +1 more source

Recovering parity-time symmetry in highly dispersive coupled optical waveguides

New Journal of Physics, 2016
Coupled photonic systems satisfying parity-time symmetry (PTS) provide flexibility to engineer the flow of light including non-reciprocal propagation, perfect laser-absorbers, and ultra-fast switching.
Ngoc B Nguyen, Stefan A Maier, Minghui Hong, Rupert F Oulton   +3 more
doaj   +1 more source