Research output: Contribution to journal › Article › peer-review
Specific Features of Optical Properties of Helical Liquid Crystals with a Large Helix Pitch. / Aksenova, E. V.; Val'kov, A. Yu; Romanov, V. P.
In: Optics and Spectroscopy (English translation of Optika i Spektroskopiya), Vol. 91, No. 6, 01.12.2001, p. 969-981.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Specific Features of Optical Properties of Helical Liquid Crystals with a Large Helix Pitch
AU - Aksenova, E. V.
AU - Val'kov, A. Yu
AU - Romanov, V. P.
PY - 2001/12/1
Y1 - 2001/12/1
N2 - Light propagation in helical liquid crystals with the helix pitch considerably exceeding the light wavelength is studied. Using a multidimensional analog of the WKB method, the Green function of the electromagnetic field in such a medium is calculated. This function contains terms corresponding to ordinary and extraordinary waves. The behavior of the Green function in the far-field region is analyzed. It is shown that for the extraordinary ray there exists, on the surface of the wave vectors, a forbidden zone, which, due to periodic changes of the refractive index, corresponds to conditions of the beam turn with the formation of a flat wave channel. The extraordinary beam trajectory, both inside and outside the wave channel, determined by the ray vector, is not flat. The asymptotic behavior of the Green function inside and outside the wave channel is substantially different.
AB - Light propagation in helical liquid crystals with the helix pitch considerably exceeding the light wavelength is studied. Using a multidimensional analog of the WKB method, the Green function of the electromagnetic field in such a medium is calculated. This function contains terms corresponding to ordinary and extraordinary waves. The behavior of the Green function in the far-field region is analyzed. It is shown that for the extraordinary ray there exists, on the surface of the wave vectors, a forbidden zone, which, due to periodic changes of the refractive index, corresponds to conditions of the beam turn with the formation of a flat wave channel. The extraordinary beam trajectory, both inside and outside the wave channel, determined by the ray vector, is not flat. The asymptotic behavior of the Green function inside and outside the wave channel is substantially different.
UR - http://www.scopus.com/inward/record.url?scp=0141674845&partnerID=8YFLogxK
U2 - 10.1134/1.1429715
DO - 10.1134/1.1429715
M3 - Article
AN - SCOPUS:0141674845
VL - 91
SP - 969
EP - 981
JO - OPTICS AND SPECTROSCOPY
JF - OPTICS AND SPECTROSCOPY
SN - 0030-400X
IS - 6
ER -
ID: 49717548