A new standard in high-field terahertz generation: the organic nonlinear optical crystal PNPA

TL;DR

This paper introduces PNPA, a new organic nonlinear optical crystal that significantly enhances high-field terahertz generation, outperforming existing standard crystals like DAST and OH-1 in efficiency.

Contribution

The study provides comprehensive characterization of PNPA, demonstrating its superior performance in intense THz generation compared to established organic NLO crystals.

Findings

PNPA enables higher THz generation efficiency than DAST and OH-1.

The crystal's properties depend on wavelength and thickness, affecting THz spectrum.

PNPA surpasses existing crystals in high-field THz applications.

Abstract

We report the full characterization of a new organic nonlinear optical (NLO) crystal for intense THz generation: PNPA ((E)-4-((4-nitrobenzylidene)amino)-N-phenylaniline). We discuss crystal growth and structural characteristics. We present the wavelength dependence of THz generation, the thickness dependence of the THz spectrum for PNPA crystals, and measure the efficiency. PNPA enables intense THz generation that surpasses NLO crystals DAST and OH-1, which have been the standard in organic high-field THz generators for several years.