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Tunable continuous wave emission via phase-matched second harmonic generation in a ZnSe microcylindrical resonator

Tunable continuous wave emission via phase-matched second harmonic generation in a ZnSe microcylindrical resonator
Tunable continuous wave emission via phase-matched second harmonic generation in a ZnSe microcylindrical resonator
Whispering gallery mode microresonators made from crystalline materials are of great interest for studies of low threshold nonlinear phenomena. Compared to amorphous materials, crystalline structures often exhibit desirable properties such as high indices of refraction, high nonlinearities, and large windows of transparency, making them ideal for use in frequency comb generation, microlasing and all-optical processing. In particular, crystalline materials can also possess a noncentrosymmetric structure which gives rise to the second order nonlinearity, necessary for three photon processes such as frequency doubling and parametric down-conversion. Here we report a novel route to fabricating crystalline zinc selenide microcylindrical resonators from our semiconductor fibre platform and demonstrate their use for tunable, low power continuous wave second harmonic generation. Visible red light is observed when pumped with a telecommunications band source by a process that is phase-matched between different higher order radial modes, possible due to the good spatial overlap between the pump and signal in the small volume resonator. By exploiting the geometrical flexibility offered by the fibre platform together with the ultra-wide 500-22000 nm transmission window of the ZnSe material, we expect these resonators to find use in applications ranging from spectroscopy to quantum information systems.
11798
Vukovic, N.
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Healy, N.
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Sparks, J.R.
40565a13-0809-4674-aa8e-9e6f4ba044d1
Badding, J.V.
940f7adb-73df-4f8a-9c46-e47f5425fef0
Horak, P.
520489b5-ccc7-4d29-bb30-c1e36436ea03
Peacock, A.C.
685d924c-ef6b-401b-a0bd-acf1f8e758fc
Vukovic, N.
3de33ba9-eb8f-4a06-a65e-4ac0a602a157
Healy, N.
26eec85c-8d12-4f21-a67a-022f8dc2daab
Sparks, J.R.
40565a13-0809-4674-aa8e-9e6f4ba044d1
Badding, J.V.
940f7adb-73df-4f8a-9c46-e47f5425fef0
Horak, P.
520489b5-ccc7-4d29-bb30-c1e36436ea03
Peacock, A.C.
685d924c-ef6b-401b-a0bd-acf1f8e758fc

Vukovic, N., Healy, N., Sparks, J.R., Badding, J.V., Horak, P. and Peacock, A.C. (2015) Tunable continuous wave emission via phase-matched second harmonic generation in a ZnSe microcylindrical resonator. Scientific Reports, 5, 11798. (doi:10.1038/srep11798).

Record type: Article

Abstract

Whispering gallery mode microresonators made from crystalline materials are of great interest for studies of low threshold nonlinear phenomena. Compared to amorphous materials, crystalline structures often exhibit desirable properties such as high indices of refraction, high nonlinearities, and large windows of transparency, making them ideal for use in frequency comb generation, microlasing and all-optical processing. In particular, crystalline materials can also possess a noncentrosymmetric structure which gives rise to the second order nonlinearity, necessary for three photon processes such as frequency doubling and parametric down-conversion. Here we report a novel route to fabricating crystalline zinc selenide microcylindrical resonators from our semiconductor fibre platform and demonstrate their use for tunable, low power continuous wave second harmonic generation. Visible red light is observed when pumped with a telecommunications band source by a process that is phase-matched between different higher order radial modes, possible due to the good spatial overlap between the pump and signal in the small volume resonator. By exploiting the geometrical flexibility offered by the fibre platform together with the ultra-wide 500-22000 nm transmission window of the ZnSe material, we expect these resonators to find use in applications ranging from spectroscopy to quantum information systems.

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Accepted/In Press date: 3 June 2015
Published date: 2 July 2015
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 378726
URI: https://eprints.soton.ac.uk/id/eprint/378726
PURE UUID: 93a2d01c-855f-44fa-ae4a-889a87cb3580
ORCID for P. Horak: ORCID iD orcid.org/0000-0002-8710-8764
ORCID for A.C. Peacock: ORCID iD orcid.org/0000-0002-1940-7172

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Date deposited: 09 Jul 2015 10:47
Last modified: 20 Jul 2019 01:03

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Contributors

Author: N. Vukovic
Author: N. Healy
Author: J.R. Sparks
Author: J.V. Badding
Author: P. Horak ORCID iD
Author: A.C. Peacock ORCID iD

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