# Fermi-edge singularity and related emission from degenerate semiconductors: Transition from a spontaneous to a stimulated process

https://mdr.nims.go.jp/datasets/76a9cff0-8d30-439a-ab14-424a769f9012

## File

- [text14_references_Figures.pdf](https://mdr.nims.go.jp/filesets/8d85e56c-3b01-436e-ac3c-e3c17f6578f4/download) ([Detail](https://mdr.nims.go.jp/filesets/8d85e56c-3b01-436e-ac3c-e3c17f6578f4.md))

## Id

76a9cff0-8d30-439a-ab14-424a769f9012

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-08-27T01:41:12.694873Z

## Updated at

2024-09-21T03:30:20.865447Z

## Published at

2024-09-21T03:30:21.511509Z

## Doi

https://doi.org/10.48505/nims.4765

## First published url

https://doi.org/10.1103/physrevb.109.075302

## Date published

2024-02-02

## Recorded date published

2024-2

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: 'Fermi-edge singularity and related emission from degenerate semiconductors:
    Transition from a spontaneous to a stimulated process'
  title_type: original
  lang: en

## Description

- description: "We report on the observation of Fermi-edge singularity in the optical
    absorption and emission spectra of high-quality degenerate Ga-doped ZnO (GZO)
    films from cryogenic to room temperature, as well as on the related stimulated
    emission under femtosecond laser pulse excitation. When the photogenerated electron-hole
    pair density np reaches a threshold, which is as low as np ≈ 1019 cm−3 at room
    temperature, the emission from\r\nthe Fermi edge shows a transition from a spontaneous
    to a stimulated regime, accompanied by a blueshift in the emission maximum. Further
    increase in the excitation fluence not only leads to a substantial increase in
    emission intensity, but it also results in broad and redshifted spectra, accompanied
    by the shortening of decay times. The resulting stimulated emission can be interpreted
    in terms of the emission of a population-inverted electron-hole plasma (EHP) in
    the weakly excited degenerated GZO. The observed low-threshold EHP stimulated
    emission is consistent with the calculated gain spectra based on a quantum many-body
    theory."
  description_type: abstract
  lang: und

## Creator

- name: Aika Tashiro
  role: author
- name: Toshihiro Nakamura
  role: author
- name: Yutaka Adachi
  role: author
  orcid: https://orcid.org/0000-0003-2666-5521
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Yoshiki Wada
  role: author
  orcid: https://orcid.org/0000-0001-5453-3679
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Takashi Uchino
  role: author

## Contact agent



## Publisher

organization: American Physical Society (APS)

## Managing organization



## Keyword

- subject: Many-body
  schema: not_defined
- subject: ZnO
  schema: not_defined
- subject: Luminescence
  schema: not_defined
- subject: Absorption
  schema: not_defined
- subject: Excitons
  schema: not_defined

## Rights

- description: "©2024 American Physical Society"
  identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Physical Review B
  issn: 1550235X
  volume: '109'
  issue: '7'
  article_number: '075302'

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## Specimen



## Chemical composition



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## Fileset

- id: 8d85e56c-3b01-436e-ac3c-e3c17f6578f4
  filename: text14_references_Figures.pdf
  content_type: application/pdf
  size: 1301563
  md5: 4cf418aa935cc988d821bf9273f8270c

## Thumbnail

fileset_id: 8d85e56c-3b01-436e-ac3c-e3c17f6578f4
filename: text14_references_Figures.pdf