Related Researcher

Author's Photo

Kim, Dai-Sik
Research Interests


Strongly Localized ohmic Absorption of Terahertz Radiation in Nanoslot Antennas

DC Field Value Language Jeong, Jeeyoon ko Kim, Dasom ko Seo, Minah ko Kim, Dai-Sik ko 2020-04-16T09:23:11Z - 2020-01-15 ko 2019-12 ko
dc.identifier.citation NANO LETTERS, v.19, no.12, pp.9062 - 9068 ko
dc.identifier.issn 1530-6984 ko
dc.identifier.uri -
dc.description.abstract Ohmic absorption of light is an indication of a light-matter interaction within metals, where many interesting phenomena and application potentials can be found. To realize the ohmic absorption of light at long wavelengths, where metals are highly reflective, one can use a metamaterial absorber design to concentrate the electromagnetic field within a thin metal film. This concept has enabled thinning of perfect absorbers from a quarter-wave thickness to several tens of nanometers, greatly improving the utility and efficiency of light-metal interactions. Further improvements on the performance are expected if the absorption can be additionally focused laterally, which is a possibility not yet explored. In this study, we report that nanoslot antennas can be a unique ohmic absorber of the low-frequency radiations, where it can incorporate 70% of incident light to ohmic absorption, focused laterally onto 1% of the unit cell area. The inductive field that drives both field enhancement and ohmic absorption is localized within a skin depth distance from the slots with amplitude being as large as 30% of the incident field. Mode-matching calculations and terahertz spectroscopy measurements confirm the inductive and localized nature of the absorption. The strong confinement of the inductive field and of the resulting ohmic absorption is expected to open a new venue in nanocalorimetry, optical nonlinearities of metals, and bolometer applications. ko
dc.language 영어 ko
dc.publisher AMER CHEMICAL SOC ko
dc.title Strongly Localized ohmic Absorption of Terahertz Radiation in Nanoslot Antennas ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-85075165251 ko
dc.identifier.wosid 000502687500090 ko
dc.type.rims ART ko
dc.identifier.doi 10.1021/acs.nanolett.9b04117 ko
dc.identifier.url ko
Appears in Collections:
PHY_Journal Papers

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show simple item record


  • mendeley


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.