THz generation using a reflective stair-step echelon
Name
Nelson_Thz generation.pdf
Size
574.5 KB
Format
Adobe PDF
Checksum (MD5)
aab34ad44f9cef335499cf2b1b9bc796
Author(s)
Ofori-Okai, Benjamin Kwasi
Sivarajah, Prasahnt
Huang, Wenqian
Nelson, Keith Adam
Date Issued
February 2016
Journal
Optics Express
Publisher
Optical Society of America
Citation
Ofori-Okai, Benjamin K., Prasahnt Sivarajah, W. Ronny Huang, and Keith A. Nelson. “THz Generation Using a Reflective Stair-Step Echelon.” Optics Express 24, no. 5 (February 29, 2016): 5057.
Version
Original manuscript
Abstract
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 μJ. 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.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Research Laboratory of Electronics
Terms of Use
Creative Commons Attribution-Noncommercial-Share Alike
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1364/oe.24.005057
