Second harmonic generation from strongly coupled localized and propagating phonon-polariton modes

Ilya Razdolski; Nikolai Christian Passler; Christopher R. Gubbin; Christopher J. Winta; Robert Cernansky; Francesco Martini; Alberto Politi; Stefan A. Maier; Martin Wolf; Alexander Paarmann; Simone De Liberato

doi:10.1103/PhysRevB.98.125425

Second harmonic generation from strongly coupled localized and propagating phonon-polariton modes

Ilya Razdolski, Nikolai Christian Passler, Christopher R. Gubbin, Christopher J. Winta, Robert Cernansky, Francesco Martini, Alberto Politi, Stefan A. Maier, Martin Wolf, Alexander Paarmann, Simone De Liberato

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

24 Citations (Scopus)

Abstract

We experimentally investigate second harmonic generation from strongly coupled localized and propagative phonon-polariton modes in arrays of silicon carbide nanopillars. Our results clearly demonstrate the hybrid nature of the system's eigenmodes and distinct manifestation of strong coupling in the linear and nonlinear responses. While in linear reflectivity the intensity of the two strongly coupled branches is essentially symmetric and well explained by their respective localized or propagative components, the second harmonic signal presents a strong asymmetry. Analyzing it in detail, we reveal the importance of interference effects between the nonlinear polarization terms originating in the bulk and in the phonon-polariton modes.

Original language	English
Article number	125425
Number of pages	7
Journal	Physical Review B
Volume	98
Issue number	12
DOIs	https://doi.org/10.1103/PhysRevB.98.125425
Publication status	Published - 26 Sept 2018
Externally published	Yes

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10.1103/PhysRevB.98.125425

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title = "Second harmonic generation from strongly coupled localized and propagating phonon-polariton modes",

abstract = "We experimentally investigate second harmonic generation from strongly coupled localized and propagative phonon-polariton modes in arrays of silicon carbide nanopillars. Our results clearly demonstrate the hybrid nature of the system's eigenmodes and distinct manifestation of strong coupling in the linear and nonlinear responses. While in linear reflectivity the intensity of the two strongly coupled branches is essentially symmetric and well explained by their respective localized or propagative components, the second harmonic signal presents a strong asymmetry. Analyzing it in detail, we reveal the importance of interference effects between the nonlinear polarization terms originating in the bulk and in the phonon-polariton modes.",

author = "Ilya Razdolski and Passler, {Nikolai Christian} and Gubbin, {Christopher R.} and Winta, {Christopher J.} and Robert Cernansky and Francesco Martini and Alberto Politi and Maier, {Stefan A.} and Martin Wolf and Alexander Paarmann and {De Liberato}, Simone",

note = "Funding Information: The authors thank W. Sch{\"o}llkopf and S. Gewinner for their assistance with operating the free-electron laser. S.D.L. acknowledges support as a Royal Society Research Fellow. S.D.L and C.R.G. acknowledge support from EPSRC Grant No. EP/M003183/1. S.A.M. acknowledges the Lee-Lucas Chair in Physics and the Leverhulme Trust. Publisher Copyright: {\textcopyright} 2018 American Physical Society.",

year = "2018",

month = sep,

day = "26",

doi = "10.1103/PhysRevB.98.125425",

language = "English",

volume = "98",

journal = "Physical Review B",

issn = "2469-9950",

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T1 - Second harmonic generation from strongly coupled localized and propagating phonon-polariton modes

AU - Razdolski, Ilya

AU - Passler, Nikolai Christian

AU - Gubbin, Christopher R.

AU - Winta, Christopher J.

AU - Cernansky, Robert

AU - Martini, Francesco

AU - Politi, Alberto

AU - Maier, Stefan A.

AU - Wolf, Martin

AU - Paarmann, Alexander

AU - De Liberato, Simone

N1 - Funding Information: The authors thank W. Schöllkopf and S. Gewinner for their assistance with operating the free-electron laser. S.D.L. acknowledges support as a Royal Society Research Fellow. S.D.L and C.R.G. acknowledge support from EPSRC Grant No. EP/M003183/1. S.A.M. acknowledges the Lee-Lucas Chair in Physics and the Leverhulme Trust. Publisher Copyright: © 2018 American Physical Society.

PY - 2018/9/26

Y1 - 2018/9/26

N2 - We experimentally investigate second harmonic generation from strongly coupled localized and propagative phonon-polariton modes in arrays of silicon carbide nanopillars. Our results clearly demonstrate the hybrid nature of the system's eigenmodes and distinct manifestation of strong coupling in the linear and nonlinear responses. While in linear reflectivity the intensity of the two strongly coupled branches is essentially symmetric and well explained by their respective localized or propagative components, the second harmonic signal presents a strong asymmetry. Analyzing it in detail, we reveal the importance of interference effects between the nonlinear polarization terms originating in the bulk and in the phonon-polariton modes.

AB - We experimentally investigate second harmonic generation from strongly coupled localized and propagative phonon-polariton modes in arrays of silicon carbide nanopillars. Our results clearly demonstrate the hybrid nature of the system's eigenmodes and distinct manifestation of strong coupling in the linear and nonlinear responses. While in linear reflectivity the intensity of the two strongly coupled branches is essentially symmetric and well explained by their respective localized or propagative components, the second harmonic signal presents a strong asymmetry. Analyzing it in detail, we reveal the importance of interference effects between the nonlinear polarization terms originating in the bulk and in the phonon-polariton modes.

UR - http://www.scopus.com/inward/record.url?scp=85053862664&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.98.125425

DO - 10.1103/PhysRevB.98.125425

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SN - 2469-9950

VL - 98

JO - Physical Review B

JF - Physical Review B

IS - 12

M1 - 125425

ER -

Second harmonic generation from strongly coupled localized and propagating phonon-polariton modes

Abstract

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