THz generation using a reflective stair-step echelon
Title: | THz generation using a reflective stair-step echelon |
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Authors: | Ofori-Okai, Benjamin K., Sivarajah, Prasahnt, Huang, W. Ronny, Nelson, Keith A. |
Publication Year: | 2015 |
Collection: | Physics (Other) |
Subject Terms: | Physics - Optics |
More Details: | We present a novel method for THz generation in lithium niobate using a reflective stair-step echelon structure. The echelon produces a discretely tilted pulse front with less angular dispersion compared to a high groove-density grating. The THz output was characterized using both a 1-lens and 3-lens imaging system to set the tilt angle at room and cryogenic temperatures. Using broadband 800 nm pulses with a pulse energy of 0.95 mJ and a pulse duration of 70 fs (24 nm FWHM bandwidth, 39 fs transform limited width), we produced THz pulses with field strengths as high as 500 kV/cm and pulse energies as high as 3.1 $\mu$J. The highest conversion efficiency we obtained was 0.33%. In addition, we find that the echelon is easily implemented into an experimental setup for quick alignment and optimization. Comment: 19 pages, 4 figures |
Document Type: | Working Paper |
DOI: | 10.1364/OE.24.005057 |
Access URL: | http://arxiv.org/abs/1512.03941 |
Accession Number: | edsarx.1512.03941 |
Database: | arXiv |
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