Photonics materials - 5Virtual room: CMC - 1
|Thursday, May 28|
PM-5-28-1 / Controlling Carrier Polarization in Plasmonic Semiconductor Nanocrystals
Penghui Yin , University of Waterloo, Canada
* Pavle V. Radovanovic , University of Waterloo, Canada
We demonstrate a robust carrier polarization in degenerately-doped semiconductor nanocrystals, enabled by non-resonant coupling of cyclotron magnetoplasmonic modes with the exciton at the Fermi level. Using magnetic circular dichroism spectroscopy, we show that intrinsic plasmon-exciton coupling allows for magnetoplasmonic-mode-induced Zeeman splitting of the excitonic states in different semiconductor nanocrystals. This splitting can be further manipulated by the type of charge carriers and degree of carrier delocalization, allowing for a host of new technological applications.
PM-5-28-2 / Valley-Polarization in Biased Bilayer Graphene using Circularly Polarized Light
* Alex Friedlan, Queen's University, Canada
Marc Dignam, Queen's University
A valley-polarization can be induced in biased bilayer graphene using circularly polarized light. In this theoretical work, we find that a nearly perfect valley-polarization can be achieved with the proper choices of external bias, pulse frequency, and pulse duration.
PM-5-28-3 / Four Wave Mixing in Tellurium-Oxide-Coated Silicon Nitride Microring Resonators
* Khadijeh Miarabbas Kiani, McMaster university, Canada
Hamidu M. Mbonde, McMaster University
Richard Mateman, Lionix International BV
Arne Leinse, Lionix International BV
Andrew Knights, McMaster university
Jonathon Bradley, McMaster university
In this work, we present on high Q tellurium oxide coated silicon nitride ring resonators with oscillation at wavelengths ranging from 1020 nm to 2530 nm under 1590 nm pumping. These results are promising for higher performance and lower threshold power nonlinear devices on a low-loss Si3N4 platform using CMOS-compatible and wafer-scale processing steps, enabling compatibility with existing photonic integrated circuit (PIC) technology.
PM-5-28-4 / Controlling propagation of light in etched high-refractive-index fiber with liquid crystal cladding
* Tigran Dadalyan, Center for Optics Photonics and Laser: Laval University, Canada
Alice Goillot, Center for Optics Photonics and Laser: Laval University
Yannick Ledemi, Center for Optics Photonics and Laser: Laval University
Tigran Galstian, Center for Optics Photonics and Laser: Laval University
Younes Messaddeq, Center for Optics Photonics and Laser: Laval University
We have developed a multimode optical fiber with high refractive index core enabling the work with nematic Liquid Crystals (NLCs). Part of the fiber’s cladding was removed by etching and replaced by an NLC. At 6kHz frequency of the electric field the transmission of light through the fiber is reduced compared to the ground state, while at 65kHz the transmission increases. The sample shows strong transmission dependence upon the incident light polarization. The ratio of the maximum and minimum transmission can reach up to 8.