Towards single-pulse terahertz spectroscopy at MHz rates

We perform single-pulse time-resolved THz detection at repetition rates up to 1.1 MHz with a table-top system. Our detection scheme combines electro-optic sampling of THz pulses with spectral encoding onto a chirped near-infrared pulse, followed by time-stretch spectroscopy to monitor the oscillatin...

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Bibliographic Details
Main Authors: Couture, Nicolas, Lippl, Markus, Cui, Wei, Ostic, Rachel, Fandio, Defi Junior Jubgang, Yalavarthi, Eeswar Kumar, Vishnuradhan, Aswin, Gamouras, Angela, Joly, Nicolas Y., Menard, Jean-Michel
Format: Conference Proceeding
Language:English
Subjects:
Data acquisition
Electrooptical waveguides
Encoding
Quality control
Real-time systems
Silicon
Spectroscopy
Online Access:Request full text
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Description
Summary:We perform single-pulse time-resolved THz detection at repetition rates up to 1.1 MHz with a table-top system. Our detection scheme combines electro-optic sampling of THz pulses with spectral encoding onto a chirped near-infrared pulse, followed by time-stretch spectroscopy to monitor the oscillating electric field of each THz pulse. We demonstrate the concept by monitoring cumulative carrier injection dynamics in silicon at 50 kHz until a saturation density is reached and investigate signal-to-noise ratio at different repetition rates. This technique paves the way towards fundamental research on fast and non-reproducible phenomena requiring real-time monitoring as well as industrial applications requiring fast data acquisition for non-invasive quality control.
ISSN:2162-2035
DOI:10.1109/IRMMW-THz57677.2023.10298917