Probing Spin-Orbit Interaction via Fano Interference
Dr. Desapogu Rajesh
IAP Physics Seminar Series will occur on Tuesday 16 April 24, at 15:15 at the UM6P campus (Ryad 8, 1st floor).
Abstract:
Surface plasmons (SP) – the collective oscillation of the bound charges in the vicinity of the conducting surface are crucial in various nanophotonic applications due to their surface confinement and relative long-range propagation. Often a subwavelength scatterer is used to excite a point-like source of SPs. In this case, the coupling efficiency is considered to by only a function of the scatterer shape and the illumination uniformity. Nevertheless, here we show that Fano interference effect modulated by the helical phase arising due to the plasmonic spin-orbit interaction(P-SOI) can significantly modify the SP excitation and even cause its total suppression. This Fano effect is experimentally studied in this paper and is shown to be a considerable parameter in plasmonic system design.
Biography :
Desapogu Rajesh earned his PhD in Physics from the University of Hyderabad, India. He worked as post-doctoral fellow at the National University of Singapore, National Chiao Tung University in Taiwan, Ariel University in Israel, University of Rennes1 in France, and University of Pittsburgh in the USA. He was a visiting fellow at Humboldt University of Berlin in Germany. His research interests span various interdisciplinary domains, focusing on optical microscopy system design for biological imaging, nano-optics, and materials physics/chemistry. Dr. Rajesh’s expertise encompasses biomedical optics, bio-photonics, polarization imaging, laser confocal microscopy, nanostructured materials, plasmonics, and thin-film optics. With a robust foundation in thin-film optics and optical instrumentation, Dr. Rajesh is poised to explore new research frontiers, particularly in controlling optical dynamics and imaging of plasmonic structures.
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