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Ultra-high modulation depth exceeding 2,400% in optically controlled topological surface plasmons

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dc.contributor.authorSim, S.-
dc.contributor.authorJang, H.-
dc.contributor.authorKoirala, N.-
dc.contributor.authorBrahlek, M.-
dc.contributor.authorMoon, J.-
dc.contributor.authorJi Ho Sung-
dc.contributor.authorPark, J.-
dc.contributor.authorCha, S.-
dc.contributor.authorOh, S.-
dc.contributor.authorMoon-Ho Jo-
dc.contributor.authorAhn, J.-H.-
dc.contributor.authorChoi, H.-
dc.date.available2016-01-25T00:12:23Z-
dc.date.created2015-11-16ko
dc.date.issued2015-10-
dc.identifier.issn2041-1723-
dc.identifier.urihttps://pr.ibs.re.kr/handle/8788114/2282-
dc.description.abstractModulating light via coherent charge oscillations in solids is the subject of intense research topics in opto-plasmonics. Although a variety of methods are proposed to increase such modulation efficiency, one central challenge is to achieve a high modulation depth (defined by a ratio of extinction with/without light) under small photon-flux injection, which becomes a fundamental trade-off issue both in metals and semiconductors. Here, by fabricating simple micro-ribbon arrays of topological insulator Bi 2 Se 3, we report an unprecedentedly large modulation depth of 2,400% at 1.5THz with very low optical fluence of 45μJcm-'2. This was possible, first because the extinction spectrum is nearly zero due to the Fano-like plasmon-phonon-destructive interference, thereby contributing an extremely small denominator to the extinction ratio. Second, the numerator of the extinction ratio is markedly increased due to the photoinduced formation of massive two-dimensional electron gas below the topological surface states, which is another contributor to the ultra-high modulation depth. © 2015 Macmillan Publishers Limited. All rights reserved-
dc.description.uri1-
dc.language영어-
dc.publisherNATURE PUBLISHING GROUP-
dc.titleUltra-high modulation depth exceeding 2,400% in optically controlled topological surface plasmons-
dc.typeArticle-
dc.type.rimsART-
dc.identifier.wosid000209871200001-
dc.identifier.scopusid2-s2.0-84946142721-
dc.identifier.rimsid21586ko
dc.date.tcdate2018-10-01-
dc.contributor.affiliatedAuthorJi Ho Sung-
dc.contributor.affiliatedAuthorMoon-Ho Jo-
dc.identifier.doi10.1038/ncomms9814-
dc.identifier.bibliographicCitationNATURE COMMUNICATIONS, v.6, pp.8814-
dc.citation.titleNATURE COMMUNICATIONS-
dc.citation.volume6-
dc.citation.startPage8814-
dc.date.scptcdate2018-10-01-
dc.description.wostc19-
dc.description.scptc26-
dc.description.journalClass1-
dc.description.journalRegisteredClassscie-
dc.description.journalRegisteredClassscopus-
Appears in Collections:
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > 1. Journal Papers (저널논문)
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