2 / 15
Page 15
Notes:
allied
academies
Materials Science and Nanotechnology | Volume 2
May 21-22, 2018 | New York, USA
International Conference on
Nanoscience & Technology
W
e investigate, experimentally and theoretically,
polarization rotation e ects 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 elds 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 nally 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.
Speaker 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.
e:
vgasparyan@csub.eduCapsize of polarization in dilute photonic nanocrystals
Vladimir Gasparian
California State University, USA