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

Jerome K. Hyun; Taehee Kang; Hyeonjun Baek; Hongseok Oh; Dai Sik Kim; Gyu Chul Yi

doi:10.1021/acsphotonics.5b00268

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

Jerome K. Hyun, Taehee Kang, Hyeonjun Baek, Hongseok Oh, Dai Sik Kim, Gyu Chul Yi

Department of Chemistry & Nanoscience

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

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.

Original language	English
Pages (from-to)	1314-1319
Number of pages	6
Journal	ACS Photonics
Volume	2
Issue number	9
DOIs	https://doi.org/10.1021/acsphotonics.5b00268
State	Published - 12 Aug 2015

Bibliographical note

Publisher Copyright:
© 2015 American Chemical Society.

Keywords

exciton-photon coupling
light-matter interaction
metal-semiconductor hybrids
nanorod
nanowire
second harmonic generation

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title = "Enhanced Second Harmonic Generation by Coupling to Exciton Ensembles in Ag-coated ZnO Nanorods",

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.",

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author = "Hyun, {Jerome K.} and Taehee Kang and Hyeonjun Baek and Hongseok Oh and Kim, {Dai Sik} and Yi, {Gyu Chul}",

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AU - Hyun, Jerome K.

AU - Kang, Taehee

AU - Baek, Hyeonjun

AU - Oh, Hongseok

AU - Kim, Dai Sik

AU - Yi, Gyu Chul

PY - 2015/8/12

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N2 - 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.

AB - 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.

KW - exciton-photon coupling

KW - light-matter interaction

KW - metal-semiconductor hybrids

KW - nanorod

KW - nanowire

KW - second harmonic generation

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

Abstract

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Keywords

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