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We report on terahertz generation from organic crystal BNA using 1.15 to 1.55 &#x03BC;m near infrared pump. We observed 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. Our results show pronounced phase matching privilege for intense THz generation using pump in the 1.15 to 1.25 &#x03BC;m where high energy near infrared pump sources are becoming increasingly more accessible.

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