Sum-Frequency Generation in High-Q GaP Metasurfaces Driven by Leaky-Wave Guided Modes

Rocio Camacho-Morales; Lei Xu; Haizhong Zhang; Son Tung Ha; Leonid Krivitsky; Arseniy I. Kuznetsov; Mohsen Rahmani; Dragomir Neshev

doi:10.1021/acs.nanolett.2c01349

Sum-Frequency Generation in High-Q GaP Metasurfaces Driven by Leaky-Wave Guided Modes

Rocio Camacho-Morales^*, Lei Xu, Haizhong Zhang, Son Tung Ha, Leonid Krivitsky, Arseniy I. Kuznetsov, Mohsen Rahmani, Dragomir Neshev

^*Corresponding author for this work

ARC Centre of Excellence for Transformative Meta-Optical Systems

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

25 Citations (Scopus)

Abstract

Resonant metasurfaces provide a unique platform for enhancing multiwave nonlinear interactions. However, the difficulties over mode matching and material transparency place significant challenges in the enhancement of these multiwave processes. Here we demonstrate efficient nonlinear sum-frequency generation (SFG) in multiresonant GaP metasurfaces based on guided-wave bound-state in the continuum resonances. The excitation of the metasurface by two near-infrared input beams generates strong SFG in the visible spectrum with a conversion efficiency of 2.5 × 10-4 W-1, 2 orders of magnitude higher than the one reported in Mie-type resonant metasurfaces. In addition, we demonstrate the nontrivial polarization dependence on the SFG process. In contrast to harmonic generation, the SFG process is enhanced when using nonparallel polarized input-beams. Importantly, by varying the input pump beam polarization it is possible to direct the SFG emission to different diffraction orders, thereby opening up new opportunities for nonlinear light sources and infrared to visible light conversion.

Original language	English
Pages (from-to)	6141-6148
Number of pages	8
Journal	Nano Letters
Volume	22
Issue number	15
DOIs	https://doi.org/10.1021/acs.nanolett.2c01349
Publication status	Published - 10 Aug 2022

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10.1021/acs.nanolett.2c01349

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title = "Sum-Frequency Generation in High-Q GaP Metasurfaces Driven by Leaky-Wave Guided Modes",

abstract = "Resonant metasurfaces provide a unique platform for enhancing multiwave nonlinear interactions. However, the difficulties over mode matching and material transparency place significant challenges in the enhancement of these multiwave processes. Here we demonstrate efficient nonlinear sum-frequency generation (SFG) in multiresonant GaP metasurfaces based on guided-wave bound-state in the continuum resonances. The excitation of the metasurface by two near-infrared input beams generates strong SFG in the visible spectrum with a conversion efficiency of 2.5 × 10-4 W-1, 2 orders of magnitude higher than the one reported in Mie-type resonant metasurfaces. In addition, we demonstrate the nontrivial polarization dependence on the SFG process. In contrast to harmonic generation, the SFG process is enhanced when using nonparallel polarized input-beams. Importantly, by varying the input pump beam polarization it is possible to direct the SFG emission to different diffraction orders, thereby opening up new opportunities for nonlinear light sources and infrared to visible light conversion.",

keywords = "GaP, Metasurfaces, nonlinear wave mixing, sum-frequency generation",

author = "Rocio Camacho-Morales and Lei Xu and Haizhong Zhang and Ha, {Son Tung} and Leonid Krivitsky and Kuznetsov, {Arseniy I.} and Mohsen Rahmani and Dragomir Neshev",

note = "Publisher Copyright: {\textcopyright} 2022 American Chemical Society.",

year = "2022",

month = aug,

day = "10",

doi = "10.1021/acs.nanolett.2c01349",

language = "English",

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T1 - Sum-Frequency Generation in High-Q GaP Metasurfaces Driven by Leaky-Wave Guided Modes

AU - Camacho-Morales, Rocio

AU - Xu, Lei

AU - Zhang, Haizhong

AU - Ha, Son Tung

AU - Krivitsky, Leonid

AU - Kuznetsov, Arseniy I.

AU - Rahmani, Mohsen

AU - Neshev, Dragomir

PY - 2022/8/10

Y1 - 2022/8/10

N2 - Resonant metasurfaces provide a unique platform for enhancing multiwave nonlinear interactions. However, the difficulties over mode matching and material transparency place significant challenges in the enhancement of these multiwave processes. Here we demonstrate efficient nonlinear sum-frequency generation (SFG) in multiresonant GaP metasurfaces based on guided-wave bound-state in the continuum resonances. The excitation of the metasurface by two near-infrared input beams generates strong SFG in the visible spectrum with a conversion efficiency of 2.5 × 10-4 W-1, 2 orders of magnitude higher than the one reported in Mie-type resonant metasurfaces. In addition, we demonstrate the nontrivial polarization dependence on the SFG process. In contrast to harmonic generation, the SFG process is enhanced when using nonparallel polarized input-beams. Importantly, by varying the input pump beam polarization it is possible to direct the SFG emission to different diffraction orders, thereby opening up new opportunities for nonlinear light sources and infrared to visible light conversion.

AB - Resonant metasurfaces provide a unique platform for enhancing multiwave nonlinear interactions. However, the difficulties over mode matching and material transparency place significant challenges in the enhancement of these multiwave processes. Here we demonstrate efficient nonlinear sum-frequency generation (SFG) in multiresonant GaP metasurfaces based on guided-wave bound-state in the continuum resonances. The excitation of the metasurface by two near-infrared input beams generates strong SFG in the visible spectrum with a conversion efficiency of 2.5 × 10-4 W-1, 2 orders of magnitude higher than the one reported in Mie-type resonant metasurfaces. In addition, we demonstrate the nontrivial polarization dependence on the SFG process. In contrast to harmonic generation, the SFG process is enhanced when using nonparallel polarized input-beams. Importantly, by varying the input pump beam polarization it is possible to direct the SFG emission to different diffraction orders, thereby opening up new opportunities for nonlinear light sources and infrared to visible light conversion.

KW - GaP

KW - Metasurfaces

KW - nonlinear wave mixing

KW - sum-frequency generation

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U2 - 10.1021/acs.nanolett.2c01349

DO - 10.1021/acs.nanolett.2c01349

M3 - Article

SN - 1530-6984

VL - 22

SP - 6141

EP - 6148

JO - Nano Letters

JF - Nano Letters

IS - 15

ER -

Sum-Frequency Generation in High-Q GaP Metasurfaces Driven by Leaky-Wave Guided Modes

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