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We report on an observation of the 1S-2S transition in atomic hydrogen using an ultraviolet mode-locked laser. The 243 nm femtosecond laser is produced through second-harmonic generation and ...
Near-infrared Single Photon Avalanche Diodes (SPADs) are the dominant, practical single photon detectors for quantum applications and low-level optical sensing. Although some infrared SPADs can ...
Chemists at the School of Science of the Hong Kong University of Science and Technology (HKUST) have recently made ...
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