Surface recombinations in III-nitride micro-LEDs probed by photon-correlation cathodoluminescence

S Finot, C Le Maoult, E Gheeraert, D Vaufrey… - ACS …, 2021 - ACS Publications
III-Nitride micro-LEDs are promising building blocks for the next generation of high
performance microdisplays. To reach a high pixel density, it is desired to achieve micro …

Contribution of dislocations to carrier recombination and transport in highly excited ELO and HVPE GaN layers

T Malinauskas, K Jarašiūnas… - … status solidi (b), 2006 - Wiley Online Library
Nonequilibrium carrier dynamics has been investigated in ELO and HVPE grown GaN
layers in a wide temperature and excitation range by using the time‐resolved picosecond …

All-optical characterization of carrier lifetimes and diffusion lengths in MOCVD-, ELO-, and HVPE-grown GaN

T Malinauskas, R Aleksiejūnas, K Jarašiūnas… - Journal of crystal …, 2007 - Elsevier
The metrological capability of the picosecond four-wave mixing (FWM) technique for
evaluation of the photoelectrical properties of GaN heterostructures grown on sapphire …

Optical monitoring of nonequilibrium carrier lifetime in freestanding GaN by time-resolved four-wave mixing and photoluminescence techniques

T Malinauskas, K Jarašiūnas, S Miasojedovas… - Applied physics …, 2006 - pubs.aip.org
Optical monitoring of nonequilibrium carrier dynamics was performed in freestanding GaN.
Four-wave mixing kinetics directly provided carrier lifetime of 5.4 ns in the layer, while …

Hole diffusivity in GaAsBi alloys measured by a picosecond transient grating technique

S Nargelas, K Jarašiūnas, K Bertulis… - Applied Physics …, 2011 - pubs.aip.org
We applied a time-resolved transient grating technique for investigation of nonequilibrium
carrier dynamics in GaAs 1− x Bi x alloys with x= 0.025–0.063⁠. The observed decrease in …

Implementation of diffractive optical element in four-wave mixing scheme for ex situ characterization of hydride vapor phase epitaxy-grown GaN layers

K Jarasiunas, R Aleksiejunas, T Malinauskas… - Review of Scientific …, 2007 - pubs.aip.org
A holographic beam splitter has been integrated into a picosecond four-wave mixing (FWM)
scheme. This modification significantly simplified the procedure of dynamic grating …

Stimulated emission threshold in thick GaN epilayers: interplay between charge carrier and photon dynamics

S Nargelas, J Mickevičius, A Kadys, K Jarašiūnas… - Optics & Laser …, 2021 - Elsevier
Room-temperature luminescence properties of a dense electron-hole plasma were studied
in a set of GaN epilayers with thickness varying from 2 to 25 µm. The stimulated emission …

Spectral distribution of excitation-dependent recombination rate in an In0. 13Ga0. 87N epilayer

K Jarašiūnas, S Nargelas, R Aleksiejūnas… - Journal of Applied …, 2013 - pubs.aip.org
Time-resolved optical techniques of photoluminescence (PL), light-induced transient grating
(LITG), and differential transmission spectroscopy were used to investigate carrier dynamics …

Impact of carrier localization and diffusion on photoluminescence in highly excited cyan and green InGaN LED structures

K Nomeika, R Aleksiejūnas, S Miasojedovas… - Journal of …, 2017 - Elsevier
Localization of charge carriers is of crucial importance in InGaN light emitting devices since
it governs carrier transport and ensures high radiative efficiency. In this work, we observe the …

Carrier dynamics in InGaN/GaN multiple quantum wells based on different polishing processes of sapphire substrate

HC Wang, SW Feng, T Malinauskas, K Jarasiunas… - Thin Solid Films, 2010 - Elsevier
We report on carrier dynamics in the green InGaN/GaN light emitting diodes grown by metal
organic chemical vapor deposition. Two LEDs with the same structures grown on pattern …