Session Overview |
Thursday, May 30 |
15:10 |
Grating-Insulator-Grating metamaterials for reconfigurable unidirectional diffraction engineering
* Abbas Sheikh Ansari, University of Alberta, Canada Ashwin K. Iyer, University of Alberta, Canada Behrad Gholipour, University of Alberta, Canada Asymmetric transmission (AT) of light is of great importance for various applications. It is shown that metamaterials lacking symmetry along the direction of propagation of light provide AT by transmission through higher diffraction orders. Here, we demonstrate AT and control the diffraction efficiency of transmitted diffraction orders in a three-layer grating-insulator-grating GIG metamaterial using both dielectric and plasmonic material platforms. Furthermore, we show that integrating phase change material in GIG metamaterials provides AT and reconfigurable control of the amplitude of diffraction orders. |
15:25 |
TBC
* Yang Liu, N/A, United States of America TBC |
15:50 |
TBC
* Zaijun Chen, N/A, United States of America TBC |
16:15 |
TBC
* Amir Safavi-Naeini, N/A, United States of America TBC |
16:40 |
Progress in heterogeneous laser integration in silicon photonics
* Chao Xiang, The University of Hong Kong, Hong Kong Recent years have witnessed significant progress in heterogeneous laser integration in silicon photonics for advanced on-chip optical functionalities and scalability. The performance of laser sources, on the other hand, also benefit from low-loss silicon photonic integrated circuits. The laser linewidths have shown several orders of magnitude improvement. In this talk, I will review and highlight the recent demonstrations of heterogeneous laser integration with ultra-low-loss silicon nitride platform. |
17:05 |
Nanoparticles Silver phototransformation
Bryan Josue Lopez-Zavala, Universidad de Guanajuato, Mexico Orlando Ortiz-Jimenez, Universidad de Guanajuato, Mexico Edgar Alvarado-Mendez, Universidad de Guanajuato, Mexico Alejandro Vazquez-Dimas, Universidad Autonoma de Nueno Leon, Mexico Ricardo Navarro-Mendoza, Universidad de Guanajuato, Mexico * Monica Trejo-Duran, Universidad de Guanajuato, Mexico In this work, we present the effects of light irradiation with different wavelengths on silver nanoparticles. We observe changes in morphology and size through UV-vis spectrophotometry and SEM analysis. The exposure time has a significant impact on the results. |
17:20 |
Optomagnetism in Two-Dimensional Dirac Materials
* Hamed Majedi, University of Waterloo, Canada The optical generation of statice magnetic field through the inverse Faraday effect is discussed in two-dimensional Dirac materials, specifically graphene and high-temperature superconductors. I illustrate how the reduced dimensionality and topological band structure enhance field-matter interaction and optomagenetic gyration coefficient. I specifically discuss the inverse Faraday rotation in graphene through quantum modeling of the renormalized band structure in the optical regime. We extend the optomagnetic effect in the microwave regime for high-temperature superconductors through field-induced gyrotropy. |