Ultrabroadband detection of multi-terahertz field transients with GaSe electro-optic sensors: Approaching the near infrared
Open accessAbstract
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=2.5μm) and directly record transform-limited pulses as short as 28fs with a 3dB bandwidth of 41THz. The continuous tunability of the center frequency over a wide interval ranging from 31THz to the far-infrared is demonstrated using thick sensors.
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The spectral phase of Kübler et al.'s pulses was below 1rad from 10 to 100THz, consistent with their cosine-like electro-optic signal.
“The spectral phase was below 1rad from 10 to 100THz, which is consistent with their cosine-like electro-optic signal and our discussion above with reference to Fig. 5.”
From A Tutorial on THz Pulse Analysis: Accurate Retrieval of Pulse Arrival Times, Spectral Energy Density and Absolute Spectral Phase (2025) · cites this paper as [32]
Kübler et al. showed the electric field of ultrabroadband mid-infrared pulses produced and detected by GaSe, with a spectral maximum at 30THz.
“Kübler et al. showed the electric field of ultrabroadband mid-infrared pulses produced and detected by GaSe, with a spectral maximum at 30THz [32].”
From A Tutorial on THz Pulse Analysis: Accurate Retrieval of Pulse Arrival Times, Spectral Energy Density and Absolute Spectral Phase (2025) · cites this paper as [32]
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References 23 · Cited by 240
- Authors
- Kübler, C., Huber, R., Tübel, S., & Leitenstorfer, A.
- Affiliations
- University of Konstanz (DE)
- Technical University of Munich (DE)
- Venue
- Applied Physics Letters
- Publisher
- AIP Publishing
- Published
- 2004-10-18
- Volume
- 85
- Issue
- 16
- Pages
- 3360-3362
- ISSN
- 0003-6951 (ISSN-L)
- 1077-3118
- OpenAlex
- W2063189161
- Cited by
- 240
- References
- 23
- Citations by year
- 2026: 3 · 2025: 8 · 2024: 10 · 2023: 12 · 2022: 12 · 2021: 11 · 2020: 10 · 2019: 14 · 2018: 13 · 2017: 10 · 2016: 5 · 2015: 10 · 2014: 8 · 2013: 20 · 2012: 8
- FWCI
- 9.75
- Type
- journal article
- Language
- en
- Open access
- green
- doi.org
- Locations
- Applied Physics Letters (publishedVersion)
- University of Regensburg Publication Server (University of Regensburg) (acceptedVersion)
- University of Regensburg Publication Server (University of Regensburg)
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Terahertz technology and applications
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Laser-Matter Interactions and Applications
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Photorefractive and Nonlinear Optics
- Keywords
- GaSe crystal, electro-optical sensors, near-infrared photodetection, phase matching, transform-limited pulses, frequency tunability, far-infrared
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