| 1. |
- Miyazaki, Akira, 1986-, et al.
(författare)
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Ultra narrowband detection scheme for dark photon / axion around 30 GHz
- 2022
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Ingår i: 2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz 2022). - : Institute of Electrical and Electronics Engineers (IEEE). - 9781728194271 - 9781728194288 ; , s. 1-1
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Konferensbidrag (refereegranskat)abstract
- We demonstrated that ultra narrowband filtering at 30 GHz dramatically enhances the signal-to-noise ratio to search for dark matter candidates which couple to millimeter waves. A coherent signal relatively locked between a synthesizer and a signal analyzer can be clearly distinguished from incoherent blackbody radiation after real time FFT over a long period. We propose a novel experiment for studying dark matter candidates.
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| 2. |
- Nagy, O., et al.
(författare)
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Transient multi-THz spectroscopy of single and multilayer 2D perovskite single crystals
- 2022
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Ingår i: IRMMW-THz 2022 - 47th International Conference on Infrared, Millimeter and Terahertz Waves. - 2162-2035 .- 2162-2027. - 9781728194271 ; 2022-August
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Konferensbidrag (refereegranskat)abstract
- With air-photonics THz platform, we investigated photo-induced carrier dynamics of single and multilayer 2D perovskite single crystals. Interesting novel features and physics are revealed with effective conductivity spectrum up to 12 THz and 40-fs time resolution.
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| 3. |
- Riepl, J., et al.
(författare)
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Sub-cycle high-order nonlinearities in a terahertz quantum cascade laser
- 2022
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Ingår i: IRMMW-THz 2022 - 47th International Conference on Infrared, Millimeter and Terahertz Waves. - 2162-2035 .- 2162-2027. - 9781728194271 ; 2022-August
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Konferensbidrag (refereegranskat)abstract
- Ultrafast electron dynamics in quantum cascade lasers hold enormous potential for the implementation of intense, compact mode-locked terahertz sources, squeezed terahertz light, frequency mixers, and comb-based metrology systems. Yet the important sub-cycle dynamics have been notoriously difficult to access in operational terahertz quantum cascade lasers. Here we show the first field-resolved two-dimensional terahertz spectroscopy of a free-running quantum cascade laser, revealing its sub-cycle gain dynamics and disentangling resonantly enhanced high-order nonlinearities up to eight-wave mixing in a regime of negative absorption.
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