Antireflection coatings optimized for single-cycle THz pulses

作者：Brunner Fabian D J^*; Feurer Thomas

来源：Applied Optics, 2013, 52(16): 3829-3832.

DOI：10.1364/AO.52.003829

We show that a single-layer antireflection coating on a THz source of high refractive index can substantially increase the transmission of emitted THz pulses. Calculations indicate that the optimum coating thickness depends on the exact shape of the generated THz waveform and whether the transmitted waveform is to be optimized for the highest peak (temporal) amplitude, peak spectral amplitude, or pulse energy. We experimentally demonstrate a 15% increase in peak amplitude, a 33% increase in peak spectral amplitude, and a 48% increase in energy for a 100 mu m thick fused silica AR coating on a lithium niobate crystal used as THz emitter.

• 出版日期2013-6-1