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초강력 레이저과학 연구단
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Single-Shot Terahertz Time Profiling Using Curved Wavefront

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Title
Single-Shot Terahertz Time Profiling Using Curved Wavefront
Author(s)
Sonal Saxena; Suman Bagchi; Bobili Sanyasi Rao; Prasad Anant Naik; Juzer Ail Chakera
Publication Date
2018-09
Journal
IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY, v.8, no.5, pp.528 - 534
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Abstract
We report an improved single-shot electro-optic sampling (EOS) based detection scheme to measure the time profile of a terahertz (THz) pulse using inherent curvature of a converging wavefront. A simple addition to conventional multishot EOS technique enables single-shot recording of THz time profile. While the temporal resolution of the proposed method is limited only by the duration of the probe laser pulse, the spatial resolution can be externally controlled with ease. Our method is easy to implement and has the potential to provide better signal-to-noise ratio compared to other single-shot methods. An interesting spin-off of the proposed technique is that the quintessential space-to-time calibration process itself reveals the spatial profile of the THz radiation. The technique is simple yet versatile and capable of characterizing THz radiation emitted by high-power THz sources employing ultrashort intense lasers and modern-day particle accelerators. As a proof of principle demonstration, we provide measurement and characterization of the THz pulse emitted by two-color laser-produced plasma in ambient atmosphere using 45 fs Ti:sapphire laser pulses. Our method faithfully reproduces the THz waveform measured by conventional scanning EOS technique. © 2018 IEEE.
URI
https://pr.ibs.re.kr/handle/8788114/5165
ISSN
2156-342X
Appears in Collections:
Center for Relativistic Laser Science(초강력 레이저과학 연구단) > Journal Papers (저널논문)
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