Enhancing Guided Second-Harmonic Light in Lithium Niobate Nanowires

Anton Sergeyev; Reinhard Geiss; Alexander S. Solntsev; Andrey A. Sukhorukov; Frank Schrempel; Thomas Pertsch; Rachel Grange

doi:10.1021/acsphotonics.5b00126

Enhancing Guided Second-Harmonic Light in Lithium Niobate Nanowires

Anton Sergeyev^*, Reinhard Geiss, Alexander S. Solntsev, Andrey A. Sukhorukov, Frank Schrempel, Thomas Pertsch, Rachel Grange

^*Corresponding author for this work

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

52 Citations (Scopus)

Abstract

We experimentally demonstrate practical approaches to enhance second-harmonic (SH) generation in individual lithium niobate nanowires (NWs) with a sub-micrometer cross-section and length up to tens of micrometers. We establish that parametric interactions of guided modes propagating along the NW determine the SH output power, which can be therefore controlled by the NW length. We show that the SH power is increased by about 84 times at wavelengths corresponding to modal phase-matching. Importantly, at non-phase-matched wavelengths the SH power can be improved by a factor of up to 9.3 by adjusting the NW length with a focused ion beam. We also characterize SH emission directionality, which can be further tailored for applications in integrated optical circuits and nonlinear microscopy.

Original language	English
Pages (from-to)	687-691
Number of pages	5
Journal	ACS Photonics
Volume	2
Issue number	6
DOIs	https://doi.org/10.1021/acsphotonics.5b00126
Publication status	Published - 17 Jun 2015

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title = "Enhancing Guided Second-Harmonic Light in Lithium Niobate Nanowires",

abstract = "We experimentally demonstrate practical approaches to enhance second-harmonic (SH) generation in individual lithium niobate nanowires (NWs) with a sub-micrometer cross-section and length up to tens of micrometers. We establish that parametric interactions of guided modes propagating along the NW determine the SH output power, which can be therefore controlled by the NW length. We show that the SH power is increased by about 84 times at wavelengths corresponding to modal phase-matching. Importantly, at non-phase-matched wavelengths the SH power can be improved by a factor of up to 9.3 by adjusting the NW length with a focused ion beam. We also characterize SH emission directionality, which can be further tailored for applications in integrated optical circuits and nonlinear microscopy.",

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AU - Sergeyev, Anton

AU - Geiss, Reinhard

AU - Solntsev, Alexander S.

AU - Sukhorukov, Andrey A.

AU - Schrempel, Frank

AU - Pertsch, Thomas

AU - Grange, Rachel

PY - 2015/6/17

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AB - We experimentally demonstrate practical approaches to enhance second-harmonic (SH) generation in individual lithium niobate nanowires (NWs) with a sub-micrometer cross-section and length up to tens of micrometers. We establish that parametric interactions of guided modes propagating along the NW determine the SH output power, which can be therefore controlled by the NW length. We show that the SH power is increased by about 84 times at wavelengths corresponding to modal phase-matching. Importantly, at non-phase-matched wavelengths the SH power can be improved by a factor of up to 9.3 by adjusting the NW length with a focused ion beam. We also characterize SH emission directionality, which can be further tailored for applications in integrated optical circuits and nonlinear microscopy.

KW - focused ion beam

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KW - second-harmonic generation

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Enhancing Guided Second-Harmonic Light in Lithium Niobate Nanowires

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