# Emission control of longitudinal optical phonon resonant thermal terahertz radiation from two-dimensional surface metal micro-structures on GaAs

https://mdr.nims.go.jp/datasets/a98bf4f0-73fe-4a7b-8124-4d45b792e261

## File

- [STAM-2026-0086_data.zip](https://mdr.nims.go.jp/filesets/27fc2408-cd9d-4eac-b26f-a67f71897fd6/download) ([Detail](https://mdr.nims.go.jp/filesets/27fc2408-cd9d-4eac-b26f-a67f71897fd6.md))
- [Emission control of longitudinal optical phonon resonant thermal terahertz radiation from two-dimensional surface metal micro-structures on GaAs.pdf](https://mdr.nims.go.jp/filesets/081371d1-12fa-4dbc-85e3-0766f38c2405/download) ([Detail](https://mdr.nims.go.jp/filesets/081371d1-12fa-4dbc-85e3-0766f38c2405.md))
- [Supplemental_Material_R1.pdf](https://mdr.nims.go.jp/filesets/832e4a5e-f8e9-415d-b58c-a5c4802cb20c/download) ([Detail](https://mdr.nims.go.jp/filesets/832e4a5e-f8e9-415d-b58c-a5c4802cb20c.md))

## Id

a98bf4f0-73fe-4a7b-8124-4d45b792e261

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-10-07T01:42:46.868833Z

## Updated at

2026-10-07T02:11:01.591936Z

## Published at

2026-10-07T03:28:00.419398Z

## Doi

https://doi.org/10.48505/nims.8645

## First published url

https://doi.org/10.1080/14686996.2026.2724893

## Date published

2026-09-21

## Recorded date published



## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Emission control of longitudinal optical phonon resonant thermal terahertz
    radiation from two-dimensional surface metal micro-structures on GaAs
  title_type: original
  lang: en

## Description

- description: Thermal emission of radiation resonant with the longitudinal optical
    (LO) phonon (LORE) has been studied using surface metal line-and-space structures
    on semiconductors. The emission perpendicular to the surface and the independence
    of the peak photon energy on emission direction are significant features, unlike
    those of surface phonon polaritons (SPhP). However, this emission is restricted
    to the optical polarization perpendicular to the stripes. In this research, two-dimensional
    (2-D) square-lattice and ring-type surface structures are fabricated and almost
    unpolarized LORE spectra are observed at 8.5 THz at 630 K, persisting to 323 K.
    Although the local spectrum minima due to optical absorption via SPhP show dependence
    on structural periods, the LORE peak energy is found to be robust. The LORE intensity
    averaged over polarizations is nearly twice that of the one-dimensional structure.
    In contrast, when fabricating a rectangular emission window with the side length
    short enough for the LO-phonon coherence, no LORE is observed. A finite-difference
    time-domain calculation suggests that this phenomenon is due to the disappearance
    of electric dipoles. Thus, two-dimensional structures enable control over the
    allowance and prohibition of THz wave emission, as well as its polarization.
  description_type: abstract
  lang: en

## Creator

- name: Takumi Oshima
  role: author
  organization: Chiba University
  department: Graduate School of Science and Engineering
- name: Daiki Yoshikawa
  role: author
- name: Yoshihiro Ishitani
  role: author

## Contact agent



## Publisher

organization: Taylor & Francis

## Managing organization



## Keyword

- subject: Longitudinal optical phonon
  schema: not_defined
- subject: radiation emission by phonon
  schema: not_defined
- subject: surface structures in the region keeping LO phonon coherence
  schema: not_defined
- subject: polarization free by two dimendional structures
  schema: not_defined
- subject: control of emission and exitinction by selecting the size of 2D emission
    window
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Science and Technology of Advanced Materials
  issn: '14686996'
  volume: '27'
  article_number: " 2724893"

## Conference



## Related item



## Funding



## Instrument



## Instrument operator



## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



## Specific property for specimen



## Process for specimen treatment



## Computational method



## Energy level/transition state



## Software



## Custom property



## Fileset

- id: 27fc2408-cd9d-4eac-b26f-a67f71897fd6
  filename: STAM-2026-0086_data.zip
  content_type: application/zip
  size: 1132915
  md5: e5ed77c999fc5aa10a279d61c61ba00f
- id: '081371d1-12fa-4dbc-85e3-0766f38c2405'
  filename: Emission control of longitudinal optical phonon resonant thermal terahertz
    radiation from two-dimensional surface metal micro-structures on GaAs.pdf
  content_type: application/pdf
  size: 5985123
  md5: ca822ea5ece74e46e79f2252a586d270
- id: 832e4a5e-f8e9-415d-b58c-a5c4802cb20c
  filename: Supplemental_Material_R1.pdf
  content_type: application/pdf
  size: 452446
  md5: a54434782c6fb33b133a17c5a3f901ac

## Thumbnail

fileset_id: '081371d1-12fa-4dbc-85e3-0766f38c2405'
filename: Emission control of longitudinal optical phonon resonant thermal terahertz
  radiation from two-dimensional surface metal micro-structures on GaAs.pdf