TY - JOUR
T1 - Optical properties of quantum energies in GaAs quantum nanodisks produced using a bio-nanotemplate and a neutral beam etching technique
AU - Ohori, Daisuke
AU - Fukuyama, Atsuhiko
AU - Thomas, Cedric Emmanuel
AU - Higo, Akio
AU - Samukawa, Seiji
AU - Ikari, Tetsuo
N1 - Funding Information:
This work was supported by Grants-in-Aid for Scientific Research (B) and (C) under the Ministry of Education, Culture, Sports, Science and Technology. We also thank Dr. Akio Suzuki of Toshiba Corporation for fruitful discussions.
Publisher Copyright:
© 2016 The Japan Society of Applied Physics.
PY - 2016/9
Y1 - 2016/9
N2 - We demonstrated that the lattice-matched GaAs quantum nanodisks (QNDs) embedded in an AlGaAs matrix were fabricated by our original topdown nanoprocess. Lattice-matched GaAs QNDs are very attractive in quantum cryptography because the spin relaxation time of QNDs might be longer than that of strained quantum dots. Quantum levels of QNDs were investigated by the photoluminescence (PL) technique. The minimum diameter and thickness of QNDs were 7 and 8 nm, respectively. PL peaks of QNDs at 1.64 and 1.66 eV were observed to be higher than that of multiple quantum wells (MQWs) observed at 1.57 eV. It is suggested that these peaks are due to the diameter distribution of QNDs. The calculated quantum levels were in good agreement with the present experimental results. The observation of the PL peaks from QNDs demonstrates that the quantum level is strongly confined not only in the perpendicular direction but also in the lateral direction.
AB - We demonstrated that the lattice-matched GaAs quantum nanodisks (QNDs) embedded in an AlGaAs matrix were fabricated by our original topdown nanoprocess. Lattice-matched GaAs QNDs are very attractive in quantum cryptography because the spin relaxation time of QNDs might be longer than that of strained quantum dots. Quantum levels of QNDs were investigated by the photoluminescence (PL) technique. The minimum diameter and thickness of QNDs were 7 and 8 nm, respectively. PL peaks of QNDs at 1.64 and 1.66 eV were observed to be higher than that of multiple quantum wells (MQWs) observed at 1.57 eV. It is suggested that these peaks are due to the diameter distribution of QNDs. The calculated quantum levels were in good agreement with the present experimental results. The observation of the PL peaks from QNDs demonstrates that the quantum level is strongly confined not only in the perpendicular direction but also in the lateral direction.
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U2 - 10.7567/JJAP.55.092101
DO - 10.7567/JJAP.55.092101
M3 - Article
AN - SCOPUS:84987667339
SN - 0021-4922
VL - 55
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
IS - 9
M1 - 092101
ER -