# Efficient Broadband Terahertz Generation from Organic Crystal BNA Using Near Infrared Pump

## TL;DR

This paper demonstrates efficient broadband terahertz generation from the organic crystal BNA using near-infrared pumping, achieving a broad spectrum up to 7 THz and high conversion efficiency, highlighting phase matching advantages.

## Contribution

It introduces a new near-infrared pump method for terahertz generation from BNA, significantly extending the emission spectrum and improving efficiency over previous techniques.

## Key findings

- Broadband terahertz emission up to 7 THz observed
- Maximum conversion efficiency of 0.8% achieved
- Pronounced phase matching in 1.15-1.25 um pump range

## Abstract

We are reporting on terahertz generation from organic crystal BNA using a 1.15 to 1.55 um near infrared pump. We observed a very large emission spectrum extending up to 7 THz, compared to 2.5 THz from Ti:Sa pump in previous reports. The maximum optical-to-THz conversion efficiency in our experiment was 0.8% at 1 kHz repetition rate and without saturation leading to a peak electric field of 1 GV/m. Our results show pronounced phase matching privilege for intense terahertz generation using a pump in the 1.15 to 1.25 um range where high energy near infrared pump sources operate.

---
Source: https://tomesphere.com/paper/1906.01492