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Enhanced Second Harmonic Generation by Coupling to Exciton Ensembles in Ag-coated ZnO Nanorods

Title
Enhanced Second Harmonic Generation by Coupling to Exciton Ensembles in Ag-coated ZnO Nanorods
Authors
Hyun, Jerome K.Kang, TaeheeBaek, HyeonjunOh, HongseokKim, Dai-sikYi, Gyu-chul
Ewha Authors
현가담
SCOPUS Author ID
현가담scopus
Issue Date
2015
Journal Title
ACS PHOTONICS
ISSN
2330-4022JCR Link
Citation
vol. 2, no. 9, pp. 1314 - 1319
Keywords
exciton-photon couplingsecond harmonic generationnanowirenanorodlight-matter interactionmetal-semiconductor hybrids
Publisher
AMER CHEMICAL SOC
Indexed
SCIE; SCOPUS WOS scopus
Abstract
We report UV emission from a ZnO nanorod (NR) highly enhanced by coupling of excitons to cavity-enhanced second harmonic generation (SHG). A Ag cavity concentrates the exciting field into the center of the NR, producing an enhanced second harmonic (SH) response through the nonlinearity of ZnO, that spatially overlaps with an ensemble of excitons. Strong coupling to the excitons at room temperature is achieved when the SH response is spectrally tuned to the exciton transition through the NR diameter, yielding total SHG enhancements of 2 orders of magnitude. Our approach highlights a unique and simple platform for enhancing coherent, nonlinear light matter interactions in a size regime that is challenging for plasmonic architectures, yet important for optoelectronics.
DOI
10.1021/acsphotonics.5b00268
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
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