Highly polarized electrically driven single-photon emission from a non-polar InGaN quantum dot

APPLIED PHYSICS LETTERS 111:25 (2017) ARTN 251108

Authors:

CC Kocher, TJ Puchtler, JC Jarman, T Zhu, T Wang, L Nuttall, RA Oliver, RA Taylor

Temperature induced crossing in the optical bandgap of mono and bilayer MoS2 on SiO2.

Scientific reports 8:1 (2018) 5380-5380

Authors:

Y Park, CCS Chan, RA Taylor, Y Kim, N Kim, Y Jo, SW Lee, W Yang, H Im, G Lee

Abstract:

Photoluminescence measurements in mono- and bilayer-MoS2 on SiO2 were undertaken to determine the thermal effect of the MoS2/SiO2 interface on the optical bandgap. The energy and intensity of the photoluminescence from monolayer MoS2 were lower and weaker than those from bilayer MoS2 at low temperatures, whilst the opposite was true at high temperatures above 200 K. Density functional theory calculations suggest that the observed optical bandgap crossover is caused by a weaker substrate coupling to the bilayer than to the monolayer.

Self-assembly of perovskite nanocrystals

PROGRESS IN MATERIALS SCIENCE 129 (2022) ARTN 100975

Authors:

Atanu Jana, Abhishek Meena, Supriya A Patil, Yongcheol Jo, Sangeun Cho, Youngsin Park, Vijaya Gopalan Sree, Hyungsang Kim, Hyunsik Im, Robert A Taylor

Perovskite: Scintillators, direct detectors, and X-ray imagers

MATERIALS TODAY 55 (2022) 110-136

Authors:

Atanu Jana, Sangeun Cho, Supriya A Patil, Abhishek Meena, Yongcheol Jo, Vijaya Gopalan Sree, Youngsin Park, Hyungsang Kim, Hyunsik Im, Robert A Taylor

Decreased fast time scale spectral diffusion of a nonpolar InGaN quantum dot

ACS Photonics American Chemical Society (2021)

Authors:

Claudius Kocher, John C Jarman, Tongtong Zhu, Gunnar Kusch, Rachel A Oliver, Robert Taylor

Abstract:

Spectral diffusion can lead to considerable broadening of the line width of nitride quantum dots. Here, InGaN quantum dots grown on a nonpolar plane were shown to exhibit a decreased spectral diffusion rate compared to polar nitride dots. A robust intensity correlation method was used to measure the spectral diffusion rate of six quantum dots. A maximum spectral diffusion time of 1170 ± 50 ns was found. An increase of the rate with increasing power was observed. The decreased internal field leads to a lifetime for the nonpolar dots that is shorter than that for polar dots; the important ratio of spectral diffusion time to lifetime is more favorable for nonpolar quantum dots, thereby increasing the chances of generating indistinguishable photons.