Self-referenced single-shot THz detection

Russell, Brandon K.; Ofori-Okai, Benjamin K.; Chen, Zhijiang; Hoffmann, Matthias C.; Tsui, Ying Y.; Glenzer, Siegfried H.

doi:10.1364/OE.25.016140

Self-referenced single-shot THz detection

Journal Article · Thu Jun 29 00:00:00 EDT 2017 · Optics Express

DOI:https://doi.org/10.1364/OE.25.016140· OSTI ID:1380108

Russell, Brandon K. ^[1]; Ofori-Okai, Benjamin K. ^[2]; Chen, Zhijiang ^[3]; Hoffmann, Matthias C. ^[3]; Tsui, Ying Y. ^[4]; Glenzer, Siegfried H. ^[3]

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.

View Accepted Manuscript (DOE)

Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: Natural Sciences and Engineering Research Council of Canada; USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 1380108

Journal Information:: Optics Express, Journal Name: Optics Express Journal Issue: 14 Vol. 25; ISSN 1094-4087; ISSN OPEXFF

Publisher:: Optical Society of America (OSA)Copyright Statement

Country of Publication:: United States

Language:: English

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Toward quasi-DC conductivity of warm dense matter measured by single-shot terahertz spectroscopy Ofori-Okai, B. K.; Descamps, A.; Lu, J. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5038944	journal	October 2018
Corrective re-gridding techniques for non-uniform sampling in time-domain terahertz spectroscopy Potts, A. M.; Mai, T. T.; Warren, M. T. Journal of the Optical Society of America B, Vol. 36, Issue 4 https://doi.org/10.1364/josab.36.001037	journal	January 2019
Corrective Re-gridding Techniques for Non-Uniform Sampling in Time Domain Terahertz Spectroscopy Potts, A. M.; Mai, T. T.; Warren, M. T. arXiv https://doi.org/10.48550/arxiv.1712.06669	text	January 2017

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Related Subjects

36 MATERIALS SCIENCE
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
Spectroscopy
Thin films
Ultrafast measurements
Ultrafast optics
terahertz

Self-referenced single-shot THz detection

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