Second-Harmonic Generation in Suspended AlGaAs Waveguides: A Comparative Study
Due to adjustable modal birefringence, suspended AlGaAs optical waveguides with submicron transverse sections can support phase-matched frequency mixing in the whole material transparency range, even close to the material bandgap, by tuning the width-to-height ratio. Furthermore, their single-pass c...
Main Authors: | , , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2020-02-01
|
Series: | Micromachines |
Subjects: | |
Online Access: | https://www.mdpi.com/2072-666X/11/2/229 |
id |
doaj-a2f43829b8dc4a6fba9cd01159a32ea1 |
---|---|
record_format |
Article |
spelling |
doaj-a2f43829b8dc4a6fba9cd01159a32ea12020-11-25T01:55:07ZengMDPI AGMicromachines2072-666X2020-02-0111222910.3390/mi11020229mi11020229Second-Harmonic Generation in Suspended AlGaAs Waveguides: A Comparative StudyIännis Roland0Marco Ravaro1Stéphan Suffit2Pascal Filloux3Aristide Lemaître4Ivan Favero5Giuseppe Leo6MPQ, Université de Paris & CNRS, 10 rue A. Domon et L. Duquet, 75013 Paris, FranceMPQ, Université de Paris & CNRS, 10 rue A. Domon et L. Duquet, 75013 Paris, FranceMPQ, Université de Paris & CNRS, 10 rue A. Domon et L. Duquet, 75013 Paris, FranceMPQ, Université de Paris & CNRS, 10 rue A. Domon et L. Duquet, 75013 Paris, FranceC2N, CNRS, Université Paris-Saclay, 10 boulevard T. Gobert, 91120 Palaiseau, FranceMPQ, Université de Paris & CNRS, 10 rue A. Domon et L. Duquet, 75013 Paris, FranceMPQ, Université de Paris & CNRS, 10 rue A. Domon et L. Duquet, 75013 Paris, FranceDue to adjustable modal birefringence, suspended AlGaAs optical waveguides with submicron transverse sections can support phase-matched frequency mixing in the whole material transparency range, even close to the material bandgap, by tuning the width-to-height ratio. Furthermore, their single-pass conversion efficiency is potentially huge, thanks to the extreme confinement of the interacting modes in the highly nonlinear and high-refractive-index core, with scattering losses lower than in selectively oxidized or quasi-phase-matched AlGaAs waveguides. Here we compare the performances of two types of suspended waveguides made of this material, designed for second-harmonic generation (SHG) in the telecom range: (a) a nanowire suspended in air by lateral tethers and (b) an ultrathin nanorib, made of a strip lying on a suspended membrane of the same material. Both devices have been fabricated from a 123 nm thick AlGaAs epitaxial layer and tested in terms of SHG efficiency, injection and propagation losses. Our results point out that the nanorib waveguide, which benefits from a far better mechanical robustness, performs comparably to the fully suspended nanowire and is well-suited for liquid sensing applications.https://www.mdpi.com/2072-666X/11/2/229second-harmonic generationwaveguidealgaas |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Iännis Roland Marco Ravaro Stéphan Suffit Pascal Filloux Aristide Lemaître Ivan Favero Giuseppe Leo |
spellingShingle |
Iännis Roland Marco Ravaro Stéphan Suffit Pascal Filloux Aristide Lemaître Ivan Favero Giuseppe Leo Second-Harmonic Generation in Suspended AlGaAs Waveguides: A Comparative Study Micromachines second-harmonic generation waveguide algaas |
author_facet |
Iännis Roland Marco Ravaro Stéphan Suffit Pascal Filloux Aristide Lemaître Ivan Favero Giuseppe Leo |
author_sort |
Iännis Roland |
title |
Second-Harmonic Generation in Suspended AlGaAs Waveguides: A Comparative Study |
title_short |
Second-Harmonic Generation in Suspended AlGaAs Waveguides: A Comparative Study |
title_full |
Second-Harmonic Generation in Suspended AlGaAs Waveguides: A Comparative Study |
title_fullStr |
Second-Harmonic Generation in Suspended AlGaAs Waveguides: A Comparative Study |
title_full_unstemmed |
Second-Harmonic Generation in Suspended AlGaAs Waveguides: A Comparative Study |
title_sort |
second-harmonic generation in suspended algaas waveguides: a comparative study |
publisher |
MDPI AG |
series |
Micromachines |
issn |
2072-666X |
publishDate |
2020-02-01 |
description |
Due to adjustable modal birefringence, suspended AlGaAs optical waveguides with submicron transverse sections can support phase-matched frequency mixing in the whole material transparency range, even close to the material bandgap, by tuning the width-to-height ratio. Furthermore, their single-pass conversion efficiency is potentially huge, thanks to the extreme confinement of the interacting modes in the highly nonlinear and high-refractive-index core, with scattering losses lower than in selectively oxidized or quasi-phase-matched AlGaAs waveguides. Here we compare the performances of two types of suspended waveguides made of this material, designed for second-harmonic generation (SHG) in the telecom range: (a) a nanowire suspended in air by lateral tethers and (b) an ultrathin nanorib, made of a strip lying on a suspended membrane of the same material. Both devices have been fabricated from a 123 nm thick AlGaAs epitaxial layer and tested in terms of SHG efficiency, injection and propagation losses. Our results point out that the nanorib waveguide, which benefits from a far better mechanical robustness, performs comparably to the fully suspended nanowire and is well-suited for liquid sensing applications. |
topic |
second-harmonic generation waveguide algaas |
url |
https://www.mdpi.com/2072-666X/11/2/229 |
work_keys_str_mv |
AT iannisroland secondharmonicgenerationinsuspendedalgaaswaveguidesacomparativestudy AT marcoravaro secondharmonicgenerationinsuspendedalgaaswaveguidesacomparativestudy AT stephansuffit secondharmonicgenerationinsuspendedalgaaswaveguidesacomparativestudy AT pascalfilloux secondharmonicgenerationinsuspendedalgaaswaveguidesacomparativestudy AT aristidelemaitre secondharmonicgenerationinsuspendedalgaaswaveguidesacomparativestudy AT ivanfavero secondharmonicgenerationinsuspendedalgaaswaveguidesacomparativestudy AT giuseppeleo secondharmonicgenerationinsuspendedalgaaswaveguidesacomparativestudy |
_version_ |
1724985008627646464 |