Temporally-multiplexed dual-frequency terahertz imaging at kilohertz frame rates Article Swipe
Lucy A. Downes
,
Charles S. Adams
,
Kevin J. Weatherill
·
YOU?
·
· 2025
· Open Access
·
· DOI: https://doi.org/10.48550/arxiv.2507.11232
YOU?
·
· 2025
· Open Access
·
· DOI: https://doi.org/10.48550/arxiv.2507.11232
We present a temporally-multiplexed dual-colour terahertz (THz) imaging technique using THz-to-optical conversion in atomic vapour. By rapidly alternating the pump laser frequency, we sequentially excite two atomic states, each absorbing a different THz frequency: 0.5 THz and 1.1 THz. Each THz field induces optical fluorescence at a distinct wavelength, enabling the creation of a sequence of alternating, interleaved images for each frequency. Synchronizing the laser switching with camera acquisition allows video capture at 1,000 frames per second for both frequencies. The system's speed is limited only by laser power and fibre switching hardware. The presented method can be scaled to image more THz frequencies through the addition of further laser frequencies, paving the way for THz hyperspectral imaging in many real-world settings.
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- http://arxiv.org/abs/2507.11232
- https://arxiv.org/pdf/2507.11232
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Temporally-multiplexed dual-frequency terahertz imaging at kilohertz frame ratesWork title
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2025Year of publication
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2025-07-15Full publication date if available
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Lucy A. Downes, Charles S. Adams, Kevin J. WeatherillList of authors in order
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https://arxiv.org/abs/2507.11232Publisher landing page
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https://arxiv.org/pdf/2507.11232Direct link to full text PDF
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0Total citation count in OpenAlex
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