Session Overview |
Nonlinear Optics, Nanophotonics and Plasmonics - Bloc 2Room: Cartier 2 |
Date: Wednesday, June 06 |
13:00 |
Enhanced Sensing with Three-Dimensional Plasmonic Nanostructures exhibiting Exceptional Points
Main Author: Boubacar Kante Organization: University of California, United States To be announced |
13:25 |
Non-Hermitian Photonics: Optics at an Exceptional Point
Main Author: Mercedeh Khajavikhan Organization: University of Central Florida, United States In recent years, non-Hermitian degeneracies, also known as exceptional points (EPs), have emerged as a new paradigm for engineering the response of optical systems. At such points, an N-dimensional space can be represented by a single eigenvalue and an eigenvector. As a result, these points are associated with abrupt phase transition in parameter space. Among many different non-conservative photonic configurations, parity-time (PT) symmetric systems are of particular interest since they provide a powerful platform to explore and consequently utilize the physics of exceptional points in a systematic manner. In this talk, I will review some of our recent works in the area of non-Hermitian (mainly PT-symmetric) active photonics. For example, in a series of works, we have demonstrated how the generation and judicial utilization of these points in laser systems can result in unexpected dynamics, unusual linewidth behavior, and improved modal response. On the other hand, biasing a photonic system at an exceptional point can lead to orders of magnitude enhancement in sensitivity- an effect that may enable a new generation of ultrasensitive optical sensors on chip. Non-Hermiticity can also be used as a means to promote or single out an edge mode in photonic topological insulator lattices. This effect has been recently utilized to demonstrate the first magnetic free topological insulator laser. |
13:50 |
Nonlinear Nanophotonics via Metallic, Dielectric, and Semiconductor Nanostructures
Main Author: Mohsen Rahmani Organization: Australian National University, Australia Nonlinear optical interactions are generally based on large bulk transparent materials that gradually accumulate a strong effect. These are not compatible with the size requirements of photonic and optoelectronic systems. Here we show the potential of nanophotonics to address this issue via the artificially induced nonlinear responses in ultra-thin nanostructures. We present a review on our latest results in this research field ranging from the symmetry breaking in subwavelength metallic nanostructures to ultra-fast light modulation by dielectric nanoantennas and ultra-efficient frequency conversion in semiconductor nanostructures. |
14:15 |
Nonlinear Optical Metastructures
Main Author: Robert W. Boyd Organization: University of Ottawa, Canada We review recent progress in the development of nonlinear op-tical metasurfaces designed to produce huge nonlinear optical response. |
14:40 |
Photon-Plasmon Mutual Coherence in Multiple-Slit Configurations
Main Author: Akbar Safari Organization: University of Ottawa, Canada We study the coherence of the excitation and propagation of surface plasmon polaritons. In a multiple-slit arrangement, we illuminate one of the slits with single photons and observe an interference pattern in the far field. We show that the plasmonic slits can be modeled by tritters, a type of beam splitter with three inputs and three output ports. |