Terahertz Field Induced Second Harmonic Coherent Detection Scheme based on a Biased Nonlinear Micro-slit

Mazhorova, Anna; Ho, Sze Phing; Clerici, Matteo; Peccianti, Marco; Pasquazi, Alessia; Razzari, Luca; Ali, Jalil; Morandotti, Roberto

doi:10.1364/cleo_si.2014.stu1f.1

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2015

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“…This limitation can be overcome by employing the well-known electric fieldinduced second harmonic generation (EFISH) sampling technique, in which the inversion symmetry of a centrosymmetric medium is broken by an external AC bias, i.e. a local oscillator [6,7]. This creates a broader possibility in terms of choice of materials for THz coherent detection.…”

Section: Introductionmentioning

confidence: 99%

Micro-Slit Based Coherent Detection of Terahertz Pulses in Biased, Solid State Media

Mazhorova

Clerici

et al. 2015

2015 IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB)

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We demonstrated coherent Terahertz characterization based on the Terahertz Field Induced SecondHarmonic effect in few microns thick Silica (SiO2) samples that can be easily operated with as little as a few hundred Volts. Our sample is an infinitely long 30 μm slit written in gold. The underlying idea of our work is that of exploiting the large breakdown voltage and the high nonlinearity of glass to achieve a large signal to noise ratio detection with a very weak optical probe at moderate bias fields, thus drastically reducing the electrodes gap. Our results pave the way to a novel approach towards broadband THz detection.

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Section: Introductionmentioning

confidence: 99%