Materials Science and Nanotechnology

Capsize of polarization in dilute photonic nanocrystals

International Conference on Nanoscience & Technology
May 21-22, 2018 | New York, USA

Vladimir Gasparian

California State University, USA

Scientific Tracks Abstracts : Mater Sci Nanotechnol

Abstract:

We investigate, experimentally and theoretically, polarization rotation effects in photonic crystals with transverse permittivity inhomogeneity perpendicular to the traveling direction of waves. A new concept of dilute photonic crystal is introduced that allow to develop an analytical approach in theory as well as easily prepare a periodical system for experiments. A capsize, namely a drastic change of polarization to the perpendicular direction is observed in a one-dimensional photonic crystal in the frequency range 10÷140 GHz. To gain more insights into the rotational mechanism, we have developed a theoretical model of dilute photonic crystal, based on Maxwell’s equations with a spatially dependent two dimensional inhomogeneous dielectric permittivity. We show that the polarization’s rotation can be explained by an optical splitting parameter appearing naturally in Maxwell’s equations for magnetic or electric fields components. This parameter is an optical analogous of Rashba like spin-orbit interaction parameter present in quantum waves, introduces a correction to the band structure of the two-dimensional Bloch states, creates the dynamical phase shift between the waves propagating in the orthogonal directions and finally leads to capsizing of the initial polarization. Excellent agreement between theory and experiment is found. Discrete polarization states that we have found in dilute photonic crystals can be very useful for quantum computing purposes.

Biography:

Vladimir Gasparian has completed his PhD at the age of 28 years from Yerevan Sate University (Armenia). He is the Professor of California State University, Bakersfield. He has published more than 100 papers in reputed journals and has been serving as an editorial board member of repute.
Email: vgasparyan@csub.edu

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