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TOM1 S2: Silicon Photonics and integrated optics II
Time:
Tuesday, 10/Sept/2024:
2:15pm - 3:45pm
Session Chair: Graham Trevor Reed, University of Southampton, United Kingdom
Location:A.1.1
Presentations
2:15pm - 2:45pm Invited ID: 483 / TOM1 S2: 1 TOM 1 Silicon Photonics and Integrated Optics
Invited - Silicon photonics for on-chip spectroscopy and sensing applications
Iain F Crowe
The University of Manchester, United Kingdom
In this contribution, we will present our latest work around on-chip spectroscopy and sensing, using either silicon (Si) or silicon nitride (SiN) Photonic Integrated Circuits (PICs). The potential of such sophisticated, yet inexpensive approaches significantly improves the prospect of being able to deliver improvements in e.g. healthcare and security applications. This talk will highlight a number of specific examples of our recent work, including a hybrid (2D-graphene oxide, GO) integrated Si MRR, operating around 1550nm and capable of the sensitive detection of a range of vapour phase volatile organic compounds (VOCs), a hybrid (2D-graphene) integrated SiN device, operating around 800nm, capable of waveguide-based evanescent excitation/collection of Raman scattered light and a compact spectrometer based on a disordered Si multi-mode interferometer (MMI), with a spatial- and spectral-dependent speckle pattern that enables us to reproducing arbitrary input signals
2:45pm - 3:15pm Invited ID: 497 / TOM1 S2: 2 TOM 1 Silicon Photonics and Integrated Optics
Invited - The heterogeneous III-V/Si photonic platform: Challenges and opportunities
Joan Ramirez
Nokia Bell Labs
In this presentation, I will provide an overview of the different technologies used to integrate III-V materials on silicon photonics to develop on-chip lasers, amplifiers and electro-absorption modulators. I will also discuss the challenges associated with each integration technology supported by different use-cases. Finally, I will share my vision on the existing opportunities for these emerging technologies to increase their maturity and readiness level for industrialization.
3:15pm - 3:30pm ID: 341 / TOM1 S2: 3 TOM 1 Silicon Photonics and Integrated Optics
Topological silicon photonic cavities based on Zak phase engineering of Bragg gratings
Alejandro Sánchez-Sánchez1, José Manuel Luque-González1, Gauthier Krizman2, Dorian Oser2, Paula Nuño Ruano2, David González-Andrade2, David Medina-Quiroz2, Samson Edmond2, Alejandro Ortega-Moñux1, Jens Schmid3, Pavel Cheben3, Laurent Vivien2, Iñigo Molina-Fernández1, J. Gonzalo Wangüemert-Pérez1, Carlos Alonso-Ramos2
1Universidad de Málaga, Spain; 2Centre de Nanosciences et de Nanotechnologies, CNRS, Université Paris-Saclay; 3National Research Council Canada, Canada
On-chip optical cavities play a crucial role in communications, sensing, quantum and nonlinear optics applications. State-of-the-art implementations are limited by trade-offs between quality factor and free-spectral range (FSR). Here, we introduce a novel approach for implementing topological photonic cavities by leveraging Zak phase engineering of Bragg gratings in silicon waveguides. We demonstrate cavities with a single resonance and a higher quality factor Q compared to of conventional Fabry-Pérot cavities, while at the same time overcoming FSR limitation of the latter.
3:30pm - 3:45pm ID: 306 / TOM1 S2: 4 TOM 1 Silicon Photonics and Integrated Optics
Novel high contrast grating hollow core waveguides for enhanced gas spectroscopy
Ajmal Thottoli1,2, Ganga Chinna Rao Devarapu2,3, Antonella D’Orazio1, Giovanni Magno1, Liam O’Faolain2,3
1Department of Electrical and Information Engineering, Politecnico di Bari, 70126, Bari, Italy; 2Centre for Advanced Photonics and Process Analysis, Munster Technological University, T12 T66T Cork, Ireland; 3Tyndall National Institute, T12 PX46 Cork, Ireland
The article presents an innovative approach to confining waves in planar high contrast grating hollow core waveguides, design achieves a surface that reflects waves effectively while maintaining a structure that allows for high transmission. The unique side-opened waveguide system also allows for gas flow through the sidewalls, making it uniquely suitable for gas spectroscopic techniques. The HCW design is specifically tailored for methane gas sensing at a wavelength of 3.27 µm. Numerical analysis shows that the transmittance can reach up to -0.41 dB. These findings demonstrate the potential of high-transmitting hollow-core waveguides for gas sensing, highlighting the effectiveness and cost-efficiency of chip-scale photonic integration in addressing energy and environmental challenges.
