Self-referenced single-shot THz detection
- SLAC National Accelerator Lab., Menlo Park, CA (United States); Univ. of Alberta, Edmonton, AB (Canada). Dept. of Electrical and Computer Engineering
- SLAC National Accelerator Lab., Menlo Park, CA (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Chemistry
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Univ. of Alberta, Edmonton, AB (Canada). Dept. of Electrical and Computer Engineering
We demonstrate a self-referencing method to reduce noise in a single-shot terahertz detection scheme. By splitting a single terahertz pulse and using a reflective echelon, both the signal and reference terahertz time-domain waveforms were measured using one laser pulse. Simultaneous acquisition of these waveforms significantly reduces noise originating from shot-to-shot fluctuations. Here, we show that correlation function based referencing, which is not limited to polarization dependent measurements, can achieve a noise floor that is comparable to state-of-the-art polarization-gated balanced detection. Lastly, we extract the DC conductivity of a 30 nm free-standing gold film using a single THz pulse. The measured value of σ0 = 1.3 ± 0.4 × 107 S m-1 is in good agreement with the value measured by four-point probe, indicating the viability of this method for measuring dynamical changes and small signals.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES); Natural Sciences and Engineering Research Council of Canada (NSERC)
- Grant/Contract Number:
- AC02-76SF00515; FWP 100182
- OSTI ID:
- 1380108
- Journal Information:
- Optics Express, Vol. 25, Issue 14; ISSN 1094-4087
- Publisher:
- Optical Society of America (OSA)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Toward quasi-DC conductivity of warm dense matter measured by single-shot terahertz spectroscopy
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journal | October 2018 |
Corrective re-gridding techniques for non-uniform sampling in time-domain terahertz spectroscopy
|
journal | January 2019 |
Corrective Re-gridding Techniques for Non-Uniform Sampling in Time Domain Terahertz Spectroscopy | text | January 2017 |
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