This talk will discuss the recent research progress in the study of nonlinear response of nanostructures, which holds a great potential to control light by light. Simultaneous enhancement of fundamental and harmonic fields over a broad range of frequencies, enhancement of third harmonic generation from an individual indium tin oxide nanoparticle decorated by a plasmonic antennae, and second harmonic generation in Au-ZnO hybrid devices, will be mentioned to address the efficiency problem. The talk will discuss also engineering specific nonlinear interaction at nanoscale, applying the best materials with large nonlinear susceptibility and high heat damage threshold, designing and developing better conversion approaches, and solution methodologies. Such approaches, which are promising to develop the next generation of electro-optical and all-optical photonic circuitry on-chip, will be important to explore in the near future.

Bio details:

Dr. Mohsen Rahmani graduated with a BEng from Iranian Azad University, MSc from Kiev Polytechnic Institute (National Technical University of Ukraine) and PhD from National University of Ukraine. After spending two years at Imperial College London as a research associate, Dr. Rahmani has recently joined The Australian National University to pursue his research activities in Nonlinear Physics Centre.

Dr. Rahmani’s initial research direction was focused on the optical properties of wavelength scale plasmonics structures. At the fundamental level, he studied the concepts of surface plasmon polaritons, (localized) surface plasmon resonances, various couplings and interactions, as well as filed Imaging and phase mapping at ultra-subdiffraction scales. He also actively contributed to design and development of several micro/nanodevices for ultra-sensitive detection of bio/chemical molecular vibrational modes from visible to infrared frequencies via single resonant and/or broadband log-periodic multi frequency nanoantennas. Probing the dielectric response of Graphene by dual-band plasmonic resonators, ultrasensitive 3D terahertz flexible metamaterial and dielectric nanoantennas exhibiting ultra-low heating field enhancements, are also some collaborative research works, performed by Dr. Rahmani.