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Cavity-enhanced harmonic generation in silicon rich nitride photonic crystal microresonators

Cavity-enhanced harmonic generation in silicon rich nitride photonic crystal microresonators
Cavity-enhanced harmonic generation in silicon rich nitride photonic crystal microresonators
We report second and third harmonic generation in photonic crystal cavities fabricated in a suspended silicon rich nitride (SiNx) membrane under resonant continuous-wave excitation at telecom wavelength. Two-dimensional photonic crystal cavities with a far-field optimized line-width modulated design were employed. A quality factor at fundamental wavelength as high as Q = 1.3 x 104 and a coupling efficiency ηe ~ 30% enabled to exploit the cavity field enhancement to achieve the generation efficiencies ρSH = (4.7 ± 0.2) x 107 W-1 and ρTH = (5.9 ± 0.3) x 105 W-2. The absence of saturation effects at high power and the transparency of the device at second harmonic wavelength suggest the absence of two-photon absorption and related detrimental effects.
2378-0967
1-5
Clementi, Marco
54aa1831-c800-48c9-b574-5db815765a85
Debnath, Kapil
aa01749d-524b-4464-b90a-af072e92a02f
Sotto, Moise, Sala Henri
2e7797fc-4433-4513-bd08-03ab7839452c
Khokhar, Ali
2eedd1cc-8ac5-4f8e-be25-930bd3eae396
Domínguez Bucio, Thalía
83b57799-c566-473c-9b53-92e9c50b4287
Saito, Shinichi
14a5d20b-055e-4f48-9dda-267e88bd3fdc
Gardes, Frederic
7a49fc6d-dade-4099-b016-c60737cb5bb2
Bajoni, Daniele
15fe760a-52f2-4156-b963-10b5f5860bb1
Galli, Matteo
72eb7b31-390d-4a79-bad5-2da07a886056
Clementi, Marco
54aa1831-c800-48c9-b574-5db815765a85
Debnath, Kapil
aa01749d-524b-4464-b90a-af072e92a02f
Sotto, Moise, Sala Henri
2e7797fc-4433-4513-bd08-03ab7839452c
Khokhar, Ali
2eedd1cc-8ac5-4f8e-be25-930bd3eae396
Domínguez Bucio, Thalía
83b57799-c566-473c-9b53-92e9c50b4287
Saito, Shinichi
14a5d20b-055e-4f48-9dda-267e88bd3fdc
Gardes, Frederic
7a49fc6d-dade-4099-b016-c60737cb5bb2
Bajoni, Daniele
15fe760a-52f2-4156-b963-10b5f5860bb1
Galli, Matteo
72eb7b31-390d-4a79-bad5-2da07a886056

Clementi, Marco, Debnath, Kapil, Sotto, Moise, Sala Henri, Khokhar, Ali, Domínguez Bucio, Thalía, Saito, Shinichi, Gardes, Frederic, Bajoni, Daniele and Galli, Matteo (2019) Cavity-enhanced harmonic generation in silicon rich nitride photonic crystal microresonators. APL Photonics, 114 (13), 1-5. (doi:10.1063/1.5066996).

Record type: Article

Abstract

We report second and third harmonic generation in photonic crystal cavities fabricated in a suspended silicon rich nitride (SiNx) membrane under resonant continuous-wave excitation at telecom wavelength. Two-dimensional photonic crystal cavities with a far-field optimized line-width modulated design were employed. A quality factor at fundamental wavelength as high as Q = 1.3 x 104 and a coupling efficiency ηe ~ 30% enabled to exploit the cavity field enhancement to achieve the generation efficiencies ρSH = (4.7 ± 0.2) x 107 W-1 and ρTH = (5.9 ± 0.3) x 105 W-2. The absence of saturation effects at high power and the transparency of the device at second harmonic wavelength suggest the absence of two-photon absorption and related detrimental effects.

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More information

In preparation date: 12 October 2018
Accepted/In Press date: 10 March 2019
e-pub ahead of print date: 2 April 2019

Identifiers

Local EPrints ID: 425274
URI: https://eprints.soton.ac.uk/id/eprint/425274
ISSN: 2378-0967
PURE UUID: 4debbf66-bff8-453c-a7c3-6f12c20935e2
ORCID for Thalía Domínguez Bucio: ORCID iD orcid.org/0000-0002-3664-1403
ORCID for Shinichi Saito: ORCID iD orcid.org/0000-0003-1539-1182

Catalogue record

Date deposited: 12 Oct 2018 16:30
Last modified: 20 Sep 2019 00:32

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