Tunable photonic crystals fabricated in III-V semiconductor slab waveguides using infiltrated liquid crystals
- 28 April 2003
- journal article
- conference paper
- Published by AIP Publishing in Applied Physics Letters
- Vol. 82 (17) , 2767-2769
- https://doi.org/10.1063/1.1570921
Abstract
Microcavity structures formed by two-dimensional photonic crystal mirrors with triangular lattice and a crystal period of 280 nm suitable for transmission experiments at about 1 μm were fabricated in III-V semiconductor planar waveguides. The photonic crystals were filled with a liquid crystal of type E7. The wavelength of the resonance peak can be shifted by the temperature-dependent refractive index of the liquid crystal. The temperature shift follows the typical refractive index behavior of liquid crystals, with a jump in wavelength at the clearing point (about and a continuous shift below. The wavelength jump is about 4 nm within a few Kelvin, while the total shift amounts to 9 nm between 20 and The experimental results agree well with the calculated temperature dependent photonic band structure by assuming a preferential alignment of the liquid-crystal molecules parallel to the holes.
Keywords
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