Abstract
Based on the Jones matrix representation of twisted nematic liquid
crystals (LC’s), we have carried out a theoretical analysis of the
polarization properties of inversely twisted nematic (ITN) LC
gratings. Some interesting polarization behaviors are expected in
the ITN LC grating. When a linearly polarized light parallel or
perpendicular to the grating direction is incident on the ITN LC
grating, the diffracted light in the 0th order is linearly polarized
with the same polarization direction of incident light, while the
diffracted light in high orders is linearly polarized perpendicular to
that of incident light. Using a multirubbing alignment technique,
we have practically prepared an ITN LC grating with ±45° inversely
twisted structures. The experimental investigations of the optical
characteristics of the ITN LC grating demonstrate agreement with
theoretical expectations.
© 1998 Optical Society of America
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