Spectroscopic investigation of defects in two-dimensional materials

Z Wu, Z Ni - Nanophotonics, 2017 - degruyter.com
Abstract Two-dimensional (2D) materials have been extensively studied in recent years due
to their unique properties and great potential for applications. Different types of structural …

Direct-bandgap emission from hexagonal Ge and SiGe alloys

EMT Fadaly, A Dijkstra, JR Suckert, D Ziss… - Nature, 2020 - nature.com
Silicon crystallized in the usual cubic (diamond) lattice structure has dominated the
electronics industry for more than half a century. However, cubic silicon (Si), germanium …

Recent advances in VECSELs

A Rahimi-Iman - Journal of Optics, 2016 - iopscience.iop.org
Within the last two decades, vertical-external-cavity surface-emitting lasers (VECSELs) have
attracted rising interest from both industry and science. They have proven to be versatile …

Low temperature-boosted high efficiency photo-induced charge transfer for remarkable SERS activity of ZnO nanosheets

J Lin, J Yu, OU Akakuru, X Wang, B Yuan, T Chen… - Chemical …, 2020 - pubs.rsc.org
Improving the photo-induced charge transfer (PICT) efficiency is the key factor for boosting
the surface-enhanced Raman scattering (SERS) performance of semiconductor …

Defects as a factor limiting carrier mobility in WSe2: A spectroscopic investigation

Z Wu, Z Luo, Y Shen, W Zhao, W Wang, H Nan, X Guo… - Nano Research, 2016 - Springer
The electrical performance of two-dimensional transition metal dichalcogenides (TMDs) is
strongly affected by the number of structural defects. In this work, we provide an optical …

Effects of interdiffusion on the luminescence of InGaAs/GaAs quantum dots

R Leon, Y Kim, C Jagadish, M Gal, J Zou… - Applied Physics …, 1996 - pubs.aip.org
Large energy shifts in the luminescence emission from strained InGaAs quantum dots are
observed as a result of postgrowth annealing and also when raising the upper cladding …

Effect of carrier emission and retrapping on luminescence time decays in InAs/GaAs quantum dots

W Yang, RR Lowe-Webb, H Lee, PC Sercel - Physical Review B, 1997 - APS
We report time-resolved photoluminescence measurements as a function of temperature for
InAs quantum dots grown by molecular-beam epitaxy on GaAs (100). As the temperature is …

Time resolved study of self‐assembled InAs quantum dots

H Yu, S Lycett, C Roberts, R Murray - Applied Physics Letters, 1996 - pubs.aip.org
We have investigated the exciton kinetics in self‐assembled InAs quantum dots and ultrathin
quantum wells grown by molecular beam epitaxy on (001) oriented GaAs substrates. At low …

Exciton dynamics in As/GaAs quantum-well heterostructures: Competition between capture and thermal emission

G Bacher, C Hartmann, H Schweizer, T Held, G Mahler… - Physical Review B, 1993 - APS
In a carefully selected set of strained In x Ga 1− x As/GaAs quantum-well structures, we have
studied experimentally and theoretically the competition between carrier collection from the …

Temperature dependence of photoluminescence spectra in InAs/GaAs quantum dot superlattices with large thicknesses

YT Dai, JC Fan, YF Chen, RM Lin, SC Lee… - Journal of applied …, 1997 - pubs.aip.org
In this report, we investigate the thermal relaxation of the photoluminescence (PL) in
InAs/GaAs quantum dot superlattices with large thicknesses that have two to more than three …