Exciton-biexciton-plasma crossover and formation of optical gain in quantum wires

Hidefumi Akiyama; Masahiro Yoshita; Yuhei Hayamizu; Shu man Liu; Makoto Okano; Loren N. Pfeiffer; Ken W. West; Ping Huai; Kenichi Asano; Tetsuo Ogawa; Cun-Zheng Ning

doi:10.1016/j.physe.2007.10.067

Exciton-biexciton-plasma crossover and formation of optical gain in quantum wires

Hidefumi Akiyama, Masahiro Yoshita, Yuhei Hayamizu, Shu man Liu, Makoto Okano, Loren N. Pfeiffer, Ken W. West, Ping Huai, Kenichi Asano, Tetsuo Ogawa, Cun-Zheng Ning

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

T-shaped GaAs quantum-wire lasers were measured to study origin of laser gain and the exciton Mott transition in one dimension. Origin of laser gain was ascribed not to free excitons, or localized excitons, but to biexciton-exciton population inversion near the threshold, or to the electron-hole (e-h) plasma at a high-density regime well above the threshold. Systematic micro-PL study revealed that dominant PL evolves with e-h density from a sharp free-exciton peak, via a biexciton peak, to an e-h plasma PL band. These demonstrated important roles of biexcitons in the Mott transition and in the initial formation of optical gain. Comparison with microscopic theories raised a question for arguments based on large renormalized band-edge shift before the Mott transition.

Original language	English (US)
Pages (from-to)	1726-1728
Number of pages	3
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	40
Issue number	5
DOIs	https://doi.org/10.1016/j.physe.2007.10.067
State	Published - Mar 2008

Keywords

Biexciton
Mott transition
Quantum wire
Semiconductor laser

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Condensed Matter Physics

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10.1016/j.physe.2007.10.067

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title = "Exciton-biexciton-plasma crossover and formation of optical gain in quantum wires",

abstract = "T-shaped GaAs quantum-wire lasers were measured to study origin of laser gain and the exciton Mott transition in one dimension. Origin of laser gain was ascribed not to free excitons, or localized excitons, but to biexciton-exciton population inversion near the threshold, or to the electron-hole (e-h) plasma at a high-density regime well above the threshold. Systematic micro-PL study revealed that dominant PL evolves with e-h density from a sharp free-exciton peak, via a biexciton peak, to an e-h plasma PL band. These demonstrated important roles of biexcitons in the Mott transition and in the initial formation of optical gain. Comparison with microscopic theories raised a question for arguments based on large renormalized band-edge shift before the Mott transition.",

keywords = "Biexciton, Mott transition, Quantum wire, Semiconductor laser",

author = "Hidefumi Akiyama and Masahiro Yoshita and Yuhei Hayamizu and Liu, {Shu man} and Makoto Okano and Pfeiffer, {Loren N.} and West, {Ken W.} and Ping Huai and Kenichi Asano and Tetsuo Ogawa and Cun-Zheng Ning",

year = "2008",

month = mar,

doi = "10.1016/j.physe.2007.10.067",

language = "English (US)",

volume = "40",

pages = "1726--1728",

journal = "Physica E: Low-Dimensional Systems and Nanostructures",

issn = "1386-9477",

publisher = "Elsevier",

number = "5",

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TY - JOUR

T1 - Exciton-biexciton-plasma crossover and formation of optical gain in quantum wires

AU - Akiyama, Hidefumi

AU - Yoshita, Masahiro

AU - Hayamizu, Yuhei

AU - Liu, Shu man

AU - Okano, Makoto

AU - Pfeiffer, Loren N.

AU - West, Ken W.

AU - Huai, Ping

AU - Asano, Kenichi

AU - Ogawa, Tetsuo

AU - Ning, Cun-Zheng

PY - 2008/3

Y1 - 2008/3

N2 - T-shaped GaAs quantum-wire lasers were measured to study origin of laser gain and the exciton Mott transition in one dimension. Origin of laser gain was ascribed not to free excitons, or localized excitons, but to biexciton-exciton population inversion near the threshold, or to the electron-hole (e-h) plasma at a high-density regime well above the threshold. Systematic micro-PL study revealed that dominant PL evolves with e-h density from a sharp free-exciton peak, via a biexciton peak, to an e-h plasma PL band. These demonstrated important roles of biexcitons in the Mott transition and in the initial formation of optical gain. Comparison with microscopic theories raised a question for arguments based on large renormalized band-edge shift before the Mott transition.

AB - T-shaped GaAs quantum-wire lasers were measured to study origin of laser gain and the exciton Mott transition in one dimension. Origin of laser gain was ascribed not to free excitons, or localized excitons, but to biexciton-exciton population inversion near the threshold, or to the electron-hole (e-h) plasma at a high-density regime well above the threshold. Systematic micro-PL study revealed that dominant PL evolves with e-h density from a sharp free-exciton peak, via a biexciton peak, to an e-h plasma PL band. These demonstrated important roles of biexcitons in the Mott transition and in the initial formation of optical gain. Comparison with microscopic theories raised a question for arguments based on large renormalized band-edge shift before the Mott transition.

KW - Biexciton

KW - Mott transition

KW - Quantum wire

KW - Semiconductor laser

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U2 - 10.1016/j.physe.2007.10.067

DO - 10.1016/j.physe.2007.10.067

M3 - Article

AN - SCOPUS:39649113309

SN - 1386-9477

VL - 40

SP - 1726

EP - 1728

JO - Physica E: Low-Dimensional Systems and Nanostructures

JF - Physica E: Low-Dimensional Systems and Nanostructures

IS - 5

ER -

Exciton-biexciton-plasma crossover and formation of optical gain in quantum wires

Abstract

Keywords

ASJC Scopus subject areas

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