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Ultrabroadband detection of multi-terahertz field transients with GaSe electro-optic sensors: Approaching the near infrared

Kübler, C. ; Huber, Rupert ; Tübel, S. ; Leitenstorfer, A.
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Date of publication of this fulltext: 31 Jan 2011 12:48


Field-resolved detection of ultrabroadband infrared pulses is implemented with GaSe crystals. Via phase matching, we extend the detectable frequency range toward the near infrared (λ=2.5 μm) and directly record transform-limited pulses as short as 28 fs with a 3 dB bandwidth of 41 THz. The continuous tunability of the center frequency over a wide interval ranging from 31 THz to the far-infrared is demonstrated using thick sensors.

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