Abstract
Anisotropic helical structures in Fabry-Perot (FP) cavities are shown to exhibit unique properties. The FP peaks are unpolarized, consisting of doublets corresponding to Bloch-Lyaponov eigenwaves with increased splitting as the local anisotropy increases and as they become closer to the photonic bandgap. The Bragg-type selective reflection peak existing in a free-cavity sample is inhibited when the helical medium is inside a cavity, and it has no effect on the cavity modes. Hence the unique characteristics are obtained even with a single period of the helix, and consequently thin films of helical liquid crystals can be used to build fast tunable polarization insensitive FP filters.
Original language | English |
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Pages (from-to) | 3019-3021 |
Number of pages | 3 |
Journal | Optics Letters |
Volume | 31 |
Issue number | 20 |
DOIs | |
State | Published - 15 Oct 2006 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics