Active directional switching of surface plasmon polaritons using a phasetransition material

Collection with item attached
2017
Item details URL
http://open-repository.kisti.re.kr/cube/handle/open_repository/474247.do
DOI
10.1038/srep43723
Title
Active directional switching of surface plasmon polaritons using a phasetransition material
Description
This work was supported by National Research Foundation (NRF) of Korea(21A20131612805). We would like to express our deepest gratitude to Dr.Jum-Bum Park and Dr. Chang Hee Son for the fruitful discussionsinvolving device fabrication and the help of the VO<INF>2</INF>ellipsometry measurement with data analysis, respectively. Parts of thisstudy have been performed using facilities at IBS Center for CorrelatedInstitute.
abstract
Active switching of near-field directivity, which is an essential functionality for compact integrated photonics and small optoelectronic elements, has been challenging due to small modulation depth and complicated fabrication methods for devices including active optical materials. Here, we theoretically and experimentally realize a nanoscale active directional switching of surface plasmon polaritons (SPPs) using a phase transition material for the first time. The SPP switching device with noticeable distinction is demonstrated based on the phase transition of vanadium dioxide (VO2) at the telecom wavelength. As the insulator-to-metal phase transition (IMT) of VO2 induces the large change of VO2 permittivity at telecom wavelengths, the plasmonic response of a nanoantenna made of VO2 can be largely tuned by external thermal stimuli. The VO2-insulator-metal (VIM) nanoantenna and its periodic array, the VIM metagrating, are suggested as optical switches. The directional power distinction ratio is designed to change from 8.13:1 to 1:10.56 by the IMT and it is experimentally verified that the ratio changes from 3.725:1 to 1:3.132 as the VIM metagratings are heated up to 90 degrees C. With an electro-thermally controllable configuration and an optimized resonant design, we expect potential applications of the active switching mechanism for integrable active plasmonic elements and reconfigurable imaging.
provenance
Made available in Cube on 2018-09-28T10:41:03Z (GMT). No. of bitstreams: 0
language
English
author
Kim, Sun-Je
Yun, Hansik
Park, Kyungsoo
Hong, Jongwoo
Yun, Jeong-Geun
Lee, Kyookeun
Kim, Joonsoo
Jeong, Sun Jae
Mun, Sang-Eun
Sung, Jangwoon
Lee, Yong Wook
Lee, Byoungho
orcid
Kim, Joonsoo/0000-0002-6470-0773
accessioned
2018-09-28T10:41:03Z
available
2018-09-28T10:41:03Z
issued
2017
citation
SCIENTIFIC REPORTS(7)
issn
2045-2322
uri
http://open-repository.kisti.re.kr/cube/handle/open_repository/474247.do
Funder
교육부
Funding Program
BK21플러스사업(0.5)
Project ID
1345274013
Jurisdiction
Rep.of Korea
Project Name
Creative Research Engineer Development for IT
rights
openAccess
type
article


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