Observation of an extremely large nonlinear response in crystalline quartz in THz regime

Soheil Zibod; Payman Rasekh; Murat Yildirim; Ravi Bhardwaj; Jean-Michel Ménard; Robert W. Boyd; Ksenia Dolgaleva

doi:10.1117/12.2610312

4 March 2022 Observation of an extremely large nonlinear response in crystalline quartz in THz regime

Soheil Zibod, Payman Rasekh, Murat Yildirim, Ravi Bhardwaj, Jean-Michel Ménard, Robert W. Boyd, Ksenia Dolgaleva

Proceedings Volume 11985, Nonlinear Frequency Generation and Conversion: Materials and Devices XXI; 119850A (2022) https://doi.org/10.1117/12.2610312
Event: SPIE LASE, 2022, San Francisco, California, United States

Abstract

We report on the experimental demonstration of nonlinear spectroscopy of crystalline quartz in the terahertz regime. Using accumulated time shift method in the time domain, we observe that with increasing the THz pulse intensity, the experienced delay increases. At higher field intensities, the delay increases with a smaller rate, demonstrating a phase saturation. Analysing the frequency response, we estimate a nonlinear refractive index of the order of 10⁻¹³ m²/W which exceeds its value in the visible range by seven orders of magnitude. Furthermore, a negative fifth-order susceptibility of the order of 10⁻³⁰ m⁴/V⁴ is obtained.

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Soheil Zibod, Payman Rasekh, Murat Yildirim, Ravi Bhardwaj, Jean-Michel Ménard, Robert W. Boyd, and Ksenia Dolgaleva "Observation of an extremely large nonlinear response in crystalline quartz in THz regime", Proc. SPIE 11985, Nonlinear Frequency Generation and Conversion: Materials and Devices XXI, 119850A (4 March 2022); https://doi.org/10.1117/12.2610312

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