christian grillet

Mid-infrared supercontinuum generation in a low-loss germanium-on-silicon waveguide

Publisher: AIP Publishing

Date: 2021

DOI: 10.1063/5.0033070

Abstract: We experimentally demonstrate supercontinuum (SC) generation in a germanium-on-silicon waveguide. This waveguide exhibits propagation loss between 1.2 dB/cm and 1.35 dB/cm in the 3.6 µm–4.5 µm spectral region for both transverse electric (TE) and transverse magnetic (TM) polarizations. By pumping the waveguide with ∼200 fs pulses at 4.6 µm wavelength, we generate a mid-infrared (IR) SC spanning nearly an octave from 3.39 µm to 6.02 µm at the −40 dB level. Through numerical analysis of the evolution of the SC, we attribute the current limit to further extension into the mid-IR mainly to free-carrier absorption.

Mid-infrared integrated silicon–germanium ring resonator with high Q-factor

Publisher: AIP Publishing

Date: 07-2023

DOI: 10.1063/5.0149324

Abstract: We report the realization of a silicon–germanium on silicon ring resonator with high Q-factor at mid-infrared wavelengths. The fabricated ring exhibits a loaded Q-factor of 236 000 at the operating wavelength of 4.18 µm. Considering the combined waveguide propagation losses and bending losses, which are measured to be below 0.2 dB/cm, even higher Q-factors could be achieved on this platform. Furthermore, our dispersion engineering of the waveguides should make these microrings suitable for nonlinear optical applications. These results pave the way for sensing applications and nonlinear optics in the mid-infrared range.

Mid-infrared supercontinuum generation in a varying dispersion waveguide for multi-species gas spectroscopy

Publisher: Institute of Electrical and Electronics Engineers (IEEE)

Date: 2023

DOI: 10.1109/JSTQE.2022.3185169

High Coherence at f and 2f of Mid-Infrared Supercontinuum Generation in Silicon Germanium Waveguides

Publisher: Institute of Electrical and Electronics Engineers (IEEE)

Date: 03-2020

DOI: 10.1109/JSTQE.2019.2943358

Toward mid-infrared nonlinear optics applications of silicon carbide microdisks engineered by lateral under-etching [Invited]

Publisher: The Optical Society

Date: 19-04-2018

DOI: 10.1364/PRJ.6.000B74

Integrated optical auto-correlator based on third-harmonic generation in a silicon photonic crystal waveguide

Publisher: Springer Science and Business Media LLC

Date: 05-02-2014

DOI: 10.1038/NCOMMS4246

Abstract: The ability to use coherent light for material science and applications is linked to our ability to measure short optical pulses. While free-space optical methods are well established, achieving this on a chip would offer the greatest benefit in footprint, performance and cost, and allow the integration with complementary signal-processing devices. A key goal is to achieve operation at sub-watt peak power levels and on sub-picosecond timescales. Previous integrated demonstrations require either a temporally synchronized reference pulse, an off-chip spectrometer or long tunable delay lines. Here we report a device capable of achieving single-shot time-domain measurements of near-infrared picosecond pulses based on an ultra-compact integrated CMOS-compatible device, which could operate without any external instrumentation. It relies on optical third-harmonic generation in a slow-light silicon waveguide. Our method can also serve as an in situ diagnostic tool to map, at visible wavelengths, the propagation dynamics of near-infrared pulses in photonic crystals.

Positive and negative phototunability of chalcogenide (AMTIR-1) microdisk resonator

Publisher: The Optical Society

Date: 27-03-2015

DOI: 10.1364/OE.23.008681

Nonlinear integrated photonics

Publisher: The Optical Society

Date: 05-2018

DOI: 10.1364/PRJ.6.00NIP1

Mid-infrared octave spanning supercontinuum generation to 85  μm in silicon-germanium waveguides

Publisher: The Optical Society

Date: 27-03-2018

DOI: 10.1364/OPTICA.5.000360

Mid-infrared nonlinear optics in SiGe waveguides

Publisher: IEEE

Date: 07-2015

DOI: 10.1109/PHOSST.2015.7248192

Mid-infrared ultra-short pulses nonlinear measurement of SiGe waveguides

Publisher: IEEE

Date: 08-2014

DOI: 10.1109/GROUP4.2014.6962010

Dispersion trimming for mid-infrared supercontinuum generation in a hybrid chalcogenide/silicon-germanium waveguide

Publisher: The Optical Society

Date: 08-01-2019

DOI: 10.1364/JOSAB.36.000A98

Green light emission in silicon through slow-light enhanced third-harmonic generation in photonic-crystal waveguides

Publisher: Springer Science and Business Media LLC

Date: 22-03-2009

DOI: 10.1038/NPHOTON.2009.28

Mid-infrared supercontinuum generation in silicon-germanium all-normal dispersion waveguides

Publisher: Optica Publishing Group

Date: 04-09-2020

DOI: 10.1364/OL.402159

Abstract: We demonstrate coherent supercontinuum generation spanning over an octave from a silicon germanium-on-silicon waveguide using ∼ 200 f s pulses at a wavelength of 4 µm. The waveguide is engineered to provide low all-normal dispersion in the TM polarization. We validate the coherence of the generated supercontinuum via simulations, with a high degree of coherence across the entire spectrum. Such a generated supercontinuum could lend itself to pulse compression down to 22 fs.

Discovery Projects - Grant ID: DP0881396

Start Date: 02-2009

End Date: 02-2013

Amount: $398,000.00

Funder: Australian Research Council

Linkage Infrastructure, Equipment And Facilities - Grant ID: LE0989648

Start Date: 10-2009

End Date: 12-2010

Amount: $350,000.00

Funder: Australian Research Council

Discovery Projects - Grant ID: DP0774658

Start Date: 06-2007

End Date: 05-2010

Amount: $231,090.00

Funder: Australian Research Council

Linkage Infrastructure, Equipment And Facilities - Grant ID: LE0989726

Start Date: 2009

End Date: 12-2009

Amount: $250,000.00

Funder: Australian Research Council

Linkage Infrastructure, Equipment And Facilities - Grant ID: LE100100092

Start Date: 2010

End Date: 12-2010

Amount: $270,000.00

Funder: Australian Research Council

Linkage Infrastructure, Equipment And Facilities - Grant ID: LE0667994

Start Date: 2006

End Date: 12-2006

Amount: $1,000,000.00

Funder: Australian Research Council

Linkage Infrastructure, Equipment And Facilities - Grant ID: LE0883030

Start Date: 09-2008

End Date: 01-2011

Amount: $450,000.00

Funder: Australian Research Council