Journal
OPTICS EXPRESS
Volume 17, Issue 9, Pages 7377-7382Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.17.007377
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We demonstrate the first electronically switchable Bragg structure for THz frequencies. The structure works as stop-band filter and as mirror. It exhibits the 60 GHz broad stop-band around 300 GHz which can be removed by reorienting liquid crystal molecules in an external electric field. Our first proof-of-principle experiments agree very well with transfer matrix calculations. (c) 2009 Optical Society of America
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