# Intrinsic process for upconversion photoluminescence via <math>  <mi>K</mi></math>-momentum–phonon coupling in carbon nanotubes

https://mdr.nims.go.jp/datasets/d844b87b-32c7-4fe9-a345-fcb9a8ce934d

## File

- [PhysRevB.110.155418.pdf](https://mdr.nims.go.jp/filesets/5c191da7-75d2-473d-b609-a545922deab3/download) ([Detail](https://mdr.nims.go.jp/filesets/5c191da7-75d2-473d-b609-a545922deab3.md))

## Id

d844b87b-32c7-4fe9-a345-fcb9a8ce934d

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-10-16T00:03:43.877616Z

## Updated at

2024-10-17T07:30:28.694655Z

## Published at

2024-10-17T07:30:28.943227Z

## Doi



## First published url

https://doi.org/10.1103/physrevb.110.155418

## Date published

2024-10-10

## Recorded date published

2024-10

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: "Intrinsic process for upconversion photoluminescence via \n<mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"><mml:mi>K</mml:mi></mml:math>\n-momentum–phonon
    coupling in carbon nanotubes"
  title_type: original
  lang: en

## Description

- description: "We investigate the intrinsic microscopic mechanism of photon upconversion
    in air-suspended single-walled carbon nanotubes through photoluminescence and
    upconversion photoluminescence spectroscopy. Nearly linear excitation power dependence
    of upconversion photoluminescence intensity is observed, indicating a one-photon
    process as the underlying mechanism. In addition, we find a strongly anisotropic
    response to the excitation polarization, which reflects the intrinsic nature of
    the upconversion process. In upconversion photoluminescence excitation spectra,
    three peaks are observed, which are similar to photoluminescence sidebands of
    the \U0001D43E-momentum dark singlet exciton. The features in the upconversion
    photoluminescence excitation spectra are well reproduced by our second-order exciton-phonon
    interaction model, enabling the determination of phonon energies and relative
    amplitudes. The analysis reveals that the upconversion photoluminescence can be
    described as a reverse process of the sideband emission linked to the \U0001D43E-momentum
    phonon modes. The validity of our model is further reinforced by temperature-dependent
    upconversion photoluminescence excitation measurements reflecting variations in
    the phonon population. Our findings underscore the pivotal role of the resonant
    exciton-phonon coupling in pristine carbon nanotubes and present potential for
    advanced optothermal technologies by engineering the excitation pathways."
  description_type: abstract
  lang: und

## Creator

- name: Daichi Kozawa
  role: author
  orcid: https://orcid.org/0000-0002-0629-5589
- name: Shun Fujii
  role: author
  orcid: https://orcid.org/0000-0002-0998-366X
- name: Yuichiro K. Kato
  role: author
  orcid: https://orcid.org/0000-0002-9942-1459

## Contact agent



## Publisher

organization: American Physical Society (APS)

## Managing organization



## Keyword

- subject: photon upconversion
  schema: not_defined
- subject: phonon
  schema: not_defined
- subject: exciton
  schema: not_defined
- subject: carbon nanotube
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by/4.0/

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## Embargo



## Journal

- title: Physical Review B
  issn: '24699950'
  volume: '110'
  issue: '15'
  article_number: '155418'

## Conference



## Related item



## Funding

- identifier: JP23K23161
  funder_name: Japan Society for the Promotion of Science
- identifier: JP22K14625
  funder_name: Japan Society for the Promotion of Science
- identifier: JP23H00262
  funder_name: Japan Society for the Promotion of Science
- identifier: JP20H02558
  funder_name: Japan Society for the Promotion of Science
- funder_name: Precise Measurement Technology Promotion Foundation
- identifier: JPMXP1222UT1136
  funder_name: Ministry of Education, Culture, Sports, Science and Technology
- funder_name: RIKEN

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## Fileset

- id: 5c191da7-75d2-473d-b609-a545922deab3
  filename: PhysRevB.110.155418.pdf
  content_type: application/pdf
  size: 914430
  md5: 88e2b14365999b1e3624a4fbaaaba7d5

## Thumbnail

fileset_id: 5c191da7-75d2-473d-b609-a545922deab3
filename: PhysRevB.110.155418.pdf