Subwavelength-spaced transmissive metallic slits for 360-degree phase control by using transparent conducting oxides

Junghyun Park, Soo Jin Kim

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We propose an apparatus that allows for active control of the transmission phase up to 360° through subwavelength-spaced metallic slits partially filled with indium tin oxide (ITO). Incident light is coupled to the guided mode in the metallic slit at one side. After going through the slit with a certain length, light is coupled out to free space at the other side. The transmission phase is governed by the mode index and the slit length. By applying bias to the ITO in the metallic slit, it is possible to control the mode index, which in turn leads to tuning of the transmission phase. The judiciously designed slit configuration facilitates the individual control of the relative phase between the neighboring slit with a subwavelength distance. This phenomenon is different from resonance-based metasurface approaches that suffer from limited range of the phase change. It is believed that the devised configuration may open novel promising future applications such as hologram imaging with phase spatial light modulators, light-field infrared microscopy, and beam forming and steering devices.

Original languageEnglish
Pages (from-to)6027-6031
Number of pages5
JournalApplied Optics
Volume57
Issue number21
DOIs
Publication statusPublished - 2018 Jul 20

Fingerprint

Phase control
phase control
slits
conduction
Oxides
oxides
Tin oxides
Indium
indium oxides
Holograms
tin oxides
Microscopic examination
Tuning
beam steering
Infrared radiation
Imaging techniques
active control
beamforming
light modulators
configurations

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

Cite this

Subwavelength-spaced transmissive metallic slits for 360-degree phase control by using transparent conducting oxides. / Park, Junghyun; Kim, Soo Jin.

In: Applied Optics, Vol. 57, No. 21, 20.07.2018, p. 6027-6031.

Research output: Contribution to journalArticle

@article{e27a387597374988b87cb9fccc95cd1b,
title = "Subwavelength-spaced transmissive metallic slits for 360-degree phase control by using transparent conducting oxides",
abstract = "We propose an apparatus that allows for active control of the transmission phase up to 360° through subwavelength-spaced metallic slits partially filled with indium tin oxide (ITO). Incident light is coupled to the guided mode in the metallic slit at one side. After going through the slit with a certain length, light is coupled out to free space at the other side. The transmission phase is governed by the mode index and the slit length. By applying bias to the ITO in the metallic slit, it is possible to control the mode index, which in turn leads to tuning of the transmission phase. The judiciously designed slit configuration facilitates the individual control of the relative phase between the neighboring slit with a subwavelength distance. This phenomenon is different from resonance-based metasurface approaches that suffer from limited range of the phase change. It is believed that the devised configuration may open novel promising future applications such as hologram imaging with phase spatial light modulators, light-field infrared microscopy, and beam forming and steering devices.",
author = "Junghyun Park and Kim, {Soo Jin}",
year = "2018",
month = "7",
day = "20",
doi = "10.1364/AO.57.006027",
language = "English",
volume = "57",
pages = "6027--6031",
journal = "Applied Optics",
issn = "1559-128X",
publisher = "The Optical Society",
number = "21",

}

TY - JOUR

T1 - Subwavelength-spaced transmissive metallic slits for 360-degree phase control by using transparent conducting oxides

AU - Park, Junghyun

AU - Kim, Soo Jin

PY - 2018/7/20

Y1 - 2018/7/20

N2 - We propose an apparatus that allows for active control of the transmission phase up to 360° through subwavelength-spaced metallic slits partially filled with indium tin oxide (ITO). Incident light is coupled to the guided mode in the metallic slit at one side. After going through the slit with a certain length, light is coupled out to free space at the other side. The transmission phase is governed by the mode index and the slit length. By applying bias to the ITO in the metallic slit, it is possible to control the mode index, which in turn leads to tuning of the transmission phase. The judiciously designed slit configuration facilitates the individual control of the relative phase between the neighboring slit with a subwavelength distance. This phenomenon is different from resonance-based metasurface approaches that suffer from limited range of the phase change. It is believed that the devised configuration may open novel promising future applications such as hologram imaging with phase spatial light modulators, light-field infrared microscopy, and beam forming and steering devices.

AB - We propose an apparatus that allows for active control of the transmission phase up to 360° through subwavelength-spaced metallic slits partially filled with indium tin oxide (ITO). Incident light is coupled to the guided mode in the metallic slit at one side. After going through the slit with a certain length, light is coupled out to free space at the other side. The transmission phase is governed by the mode index and the slit length. By applying bias to the ITO in the metallic slit, it is possible to control the mode index, which in turn leads to tuning of the transmission phase. The judiciously designed slit configuration facilitates the individual control of the relative phase between the neighboring slit with a subwavelength distance. This phenomenon is different from resonance-based metasurface approaches that suffer from limited range of the phase change. It is believed that the devised configuration may open novel promising future applications such as hologram imaging with phase spatial light modulators, light-field infrared microscopy, and beam forming and steering devices.

UR - http://www.scopus.com/inward/record.url?scp=85050201110&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85050201110&partnerID=8YFLogxK

U2 - 10.1364/AO.57.006027

DO - 10.1364/AO.57.006027

M3 - Article

VL - 57

SP - 6027

EP - 6031

JO - Applied Optics

JF - Applied Optics

SN - 1559-128X

IS - 21

ER -