Session Overview |
Tuesday, May 28 |
08:55 |
Tuning broadband volatile and non-volatile transitions in nanostructured phase change and photo-ionic chalcogenide metacoatings
* Behrad Gholipour, University of Alberta, Canada Avik MAndal, University of Alberta Joshua Perkins, University of Alberta Ahmed Elfarash, University of Alberta Mahirah Zaini, University of Alberta James Davis, University of Alberta Kwanghyun Kim, University of Alberta We show that the precise, non-resonant, subwavelength, dispersion engineering of phase change and photo-ionic chalcogenide glasses, through lithography-free and bottom-up growth techniques, paves the way to the realization of alloys with tunable optical and electronic properties. We show that tunability may be achieved on a material level without needing stoichiometric changes to chemical composition through oblique angle vapour deposition techniques and discuss their integration into various metamaterial and photonic integrated circuit device platforms for telecommunication and emerging computing applications. |
09:20 |
Ultrafast Quadratic Nonlinear Nanophotonics: From Superior Components to Advanced Circuits
* Alireza Marandi, California Institute of Technology, United States of America Ultrafast sciences and technologies are founded on the principles of ultrashort-pulse nonlinear optics. Until now, their discrete and bulky nature has hindered the utilization of their vast functionalities for many applications, ranging from sensing to computing and quantum information processing. In the past few years, nanophotonic lithium niobate (LN) has emerged as one of the most promising platforms for integrated photonics, characterized by strong quadratic nonlinearity. In this talk, I will present recent experimental progress in the realization and utilization of ultrafast nonlinear devices in nanophotonic LN, which outperform their table-top counterparts. These advancements include intense optical parametric amplification [1], ultrafast ultra-low-energy all-optical switching [2], few-cycle vacuum squeezing [3], ultrafast laser mode-locking [4], and ultrabroadband coherent light sources [5, 6]. I will also discuss ongoing efforts toward the miniaturization of ultrafast technologies and the development of chip-scale ultrafast nanophotonic circuits in both the classical and quantum regimes. [1] L. Ledezma, R. Sekine, Q. Guo, R. Nehra, S. Jahani, A. Marandi, “Intense optical parametric amplification in dispersion engineered nanophotonic lithium niobate waveguides,” Optica 9 (3), 303-308 (2022). [2] Q. Guo, R. Sekine, L. Ledezma, R. Nehra, D. J. Dean, A. Roy, R. M. Gray, S. Jahani, A. Marandi, “Femtojoule femtosecond all-optical switching in lithium niobate nanophotonics,” Nature Photonics 16, 625–631 (2022). [3] R. Nehra, R. Sekine, L. Ledezma, Q. Guo, R. M. Gray, A. Roy, A. Marandi, “Few-cycle vacuum squeezing in nanophotonics,” Science 377, 1333–1337 (2022). [4] Q. Guo, B. K. Gutierrez, R. Sekine, R. M. Gray, J. A. Williams, L. Ledezma, L. Costa, A. Roy, S. Zhou, M. Liu, A. Marandi, “Ultrafast mode-locked laser in nanophotonic lithium niobate,” Science 382, 708-713 (2023). [5] A. Roy, L. Ledezma, L. Costa, R. Gray, R. Sekine, Q. Guo, M. Liu, R. M. Briggs, A. Marandi, “Visible-to-mid-IR tunable frequency comb in nanophotonics,” Nature Communications 14 (1), 6549 (2023). [6] R. Sekine, R. M. Gray, L. Ledezma, S. Zhou, Q. Guo, A. Marandi, “Multi-octave frequency comb from an ultra-low-threshold nanophotonic parametric oscillator,” (arXiv:2309.04545). |
09:45 |
All-Dielectric Huygens' Meta-Waveguides for Nonlinear Integrated Photonics
* Ozan William Oner, University of Ottawa, Canada Gabriel Flizikowski, University of Ottawa, Canada M. Saad Bin-Alam, National Research Council of Canada, Canada Thomas Pertsch, Friedrich-Schiller-Universität Jena, Germany Isabelle Staude, Friedrich-Schiller-Universität Jena, Germany Jens Schmid, National Research Council of Canada, Canada Pavel Cheben, National Research Council of Canada Ksenia Dolgaleva, University of Ottawa, Canada A novel silicon-on-insulator nanophotonic waveguide comprising a chain of resonantly forward scattering nanoparticles has experimentally demonstrated compensation of nonlinear optical effects, enabling spectral pulse integrity for high power integrated photonics. |
10:00 |
Kerker Effect in InGaAs Metasurfaces for Near-Unity Absorption Efficiency
* Sasan V. Grayli, University of Waterloo, Canada Brad van Kasteren, University of Waterloo, Canada Tarun Patel, University of Waterloo, Canada Sathursan Kokilathasan, University of Waterloo, Canada Sarah Odinotski, University of Waterloo, Canada Burak Tekcan, University of Waterloo, Canada Adam Tsem, University of Waterloo, Canada Zbigniew Wasilewski, University of Waterloo, Canada Michael Reimer, University of Waterloo, Canada The emergence of semiconductor metasurfaces has opened opportunities to address the shortcomings of commercially available portable photodetectors. However, the performance of semiconductor metasurfaces is negatively impacted by the refractive index of the surrounding environment including the substrate. Here, we demonstrate a spectrally selective metasurface with near-unity absorption efficiency on a high-index III-V semiconductor substrate. Our design leverages higher order modes to generate Kerker interference leading to over 94% peak absorption efficiency at λ=920 nm. This work promises a new class of photodetectors with high quantum efficiency and high timing resolution. |
10:15 |
CMOS Compatible Add-drop Silicon-Organic Hybrid Racetrack Modulator
* Maryam Moridsadat, Queen's University, Canada Marcus Tamura, Queen's University, Canada Bhavin Shastri, Queen's University, Canada Optical modulators are vital in various applications, including data transmission, optical computing, and sensing. Current optical modulators rely on silicon due to compatibility with complementary metal-oxide semiconductor (CMOS). However, silicon modulators face challenges in terms of speed, energy efficiency, and area. This necessitates adding new materials to silicon platforms. Here, we design and fabricate a CMOS-compatible add-drop silicon-organic-hybrid racetrack modulator. It promises a high modulation bandwidth(96GHz) and low energy consumption(0.16fJ/bit), enabling the next generation of optical computing and data transmission. |