13 / 16
E u r o S c i C o n J o i n t E v e n t o n
Laser Optics & Photonics and
Atomic & Plasma Science
American Journal of Computer Science and Information Technology
ISSN: 2349-3917
J u l y 1 6 - 1 7 , 2 0 1 8
P r a g u e , C z e c h R e p u b l i c
Page 43
Laser Optics & Photonics and Atomic & Plasma Science 2018
S
urface-enhanced optical processes, surface-enhanced Raman scattering
(SERS), surface-enhanced hyper Raman scattering (SEHRS) and surface
enhanced infrared absorption (SEIRA) are of great interest for physics, chemistry
and biology since they allow strongly increased sensitivity of these spectroscopic
methods and are caused by a fundamental physical mechanism. It is so-called
strong quadrupole light-molecule interaction, arising in surface electromagnetic
fields, strongly varying in space near a rough metal surface. Just this interaction
is responsible for the enhancement in SERS ~10
6
, in SEIRA ~10
3
-10
4
and in
SEHRS ~10
12
and significantly higher. Moreover, this interaction is the base for
implementation of single molecule detection by SERS, when the enhancement
can achieve the value ~10
14
-10
15
. This interaction is responsible for appearance of
forbidden lines inall theseprocessesonmoleculeswithsufficientlyhighsymmetry.
In SEIRA and SEHRS, it is expressed in their belonging to the vibrations with a unit
irreducible representation of themolecule symmetry group. In SERS these lines are
those, caused by vibrations transforming as the dipolemoment component , which
is perpendicular to the metal surface. One of the main fundamental properties
of this interaction is that it is forbidden in molecules with cubic and icosahedral
symmetry groups due to the electrodynamical law div
E=0
. This forbiddance is
named as the electro dynamical forbiddance and was observed in fullerene C
60
.
At present the theory of the above mentioned processes, based on this concept is
created and explains the most of the observed phenomena, accompanying SERS,
SEHRS and SEIRA.
Biography
Aleksey Mikhailovich Polubotko has graduated from
Physical Faculty of Leningrad State University in 1973. He is
Radiophysiсist in accordance with his education. However,
now he works as a Physicist Theorist. He received his Doctor
of Science degree in 1983. He worked as a Junior Scientific
researcher and Scientific researcher from 1982 till 2013 and
Senior Scientific researcher from 2013 till now. He worked
abroad in October 1993 as an Associated Professor in Tohoku
University, Sendai, Japan, as a Post-doctoral fellow from
1 August till 30 October 1997 in Northwestern University,
Evanston, USA and as a Professor from 1 August till 30
November 2000 in Xiamen University, Xiamen, China. Now he
is a Senior Scientific researcher of the sector of the Theory of
semiconductors and dielectrics, the Department of dielectrics
and semiconductors, A F Ioffe Physico-Technical Institute, Saint
Petersburg, Russia.
alex.marina@mail.ioffe.ruSurface-enhanced optical processes and
a strong quadrupole light-molecule,
matter interaction
V P Chelibanov
1
and A M Polubotko
2
1
ITMO University, Russian Federation
2
Loffe Physico-Technical Institute, Russian Federation
V P Chelibanov et al, Am J Compt Sci Inform Technol 2018, Volume 6
DOI: 10.21767/2349-3917-C1-001