13 / 17
Fig. 12. Schematic diagrams of installations for photon-axion conversion in magnetic
field without the additional resonator (
a
) and with Fabry-Perot resonator(
b
):
1
— laser;
2
— magnet;
3
— wall;
4
— photodetector;
5
— IO;
6
— Fabry–Perot interferometer
of the exciting laser radiation in disperse structures and in globular photon
crystals.
The installations presented in Fig. 13,
a,
and
b
are designed for
observation of the photon to paraphoton and inverted conversion process
in the material media, when exciting radiation corresponds to unitary
polaritons of the material medium. At the same time, light penetration
through an opaque wall should take place. The installation shown in
Fig. 13,
c
corresponds to the condition of observation of a new type of light
scattering — paraphoton light scattering. During the elementary paraphoton
scattering, a photon of exciting radiation decays into a paraphoton (a scalar
photon) and a polar photon.
Contrary to the Raman scattering during the paraphoton scattering,
according to the selection rules, they are polar modes in centrosymmetrical
media such as alkali halide crystals which are active for the scattering
process.
The installations shown in Fig. 13,
d
and
e
are designed for generation
of THz-band infrared radiation during parametric processes and the Raman
scattering. The installation shown in Fig. 13,
f
is used for detecting possible
existence of longitudinal photons in vacuum.
Conclusion.
This article has analyzed conditions for excitation of
transverse and longitudinal electromagnetic waves both in material media
48
ISSN 1812-3368. Herald of the BMSTU. Series “Natural Sciences”. 2015. No. 1