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Fig. 8. Induced Raman scattering spectra of light by totally symmetrical modes

in a calcite monocrystal (

a

), in organic compound POPOP powder (

b

), and liquid

nitrogen (

c

)

direction of the laser impulse propagation (Fig. 10,

b

). According to the

figure, the intensity of the Raman scattering is comparable to the pumping

intensity. In the case of the “longitudinal” Raman scattering, the frequency

shift corresponds to the longitudinal 4А

1

LO-phonon event, and in the case

of the “transverse” Raman scattering, two satellites are present, one of

which corresponds to a 4А

1

TO-phonon (backward scattering), and another

one — to a transverse polariton (p) (forward scattering).

Fig. 11 shows a diagram of the photon-axion conversion in a magnetic

field from area

a

to area

b

. Dashed line corresponds to the axions, wavy

Fig. 9. Interferograms of the generation spectra of the ruby laser (

a

) and induced

globular scattering of light in an artificial opal with the globule diameter of 250 nm (

b

)

46

ISSN 1812-3368. Herald of the BMSTU. Series “Natural Sciences”. 2015. No. 1