Journal ArticleDOI
Terahertz radiation from superconducting YBa2Cu3O7−δ thin films excited by femtosecond optical pulses
Masanori Hangyo,S. Tomozawa,Yoshishige Murakami,Masayoshi Tonouchi,Masahiko Tani,Zhen Wang,Kiyomi Sakai,Seiji Nakashima +7 more
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TLDR
In this paper, the characteristics of the radiation are studied and the radiation mechanism is ascribed to the ultrafast supercurrent modulation by the laser pulses, which induce the nonequilibrium superconductivity.Abstract:
Ultrashort electromagnetic waves (600 fs width) from superconducting YBCO thin films have been observed by irradiating current‐biased samples with femtosecond optical laser pulses (80 fs width). The Fourier component of the pulse extends up to ∼2 THz. The characteristics of the radiation are studied and the radiation mechanism is ascribed to the ultrafast supercurrent modulation by the laser pulses, which induce the nonequilibrium superconductivity.read more
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Journal ArticleDOI
Exploring dynamics in the far-infrared with terahertz spectroscopy.
Journal ArticleDOI
High average-power THz radiation from femtosecond laser-irradiated InAs in a magnetic field and its elliptical polarization characteristics
TL;DR: In this paper, it was shown that the THz-radiation power from bulk InAs irradiated with femtosecond optical pulses is significantly enhanced and reaches 650 μW in a 1.7 T magnetic field with 1.5 W excitation power.
Journal ArticleDOI
Tunable terahertz-wave parametric oscillators using LiNbO/sub 3/ and MgO:LiNbO/sub 3/ crystals
TL;DR: In this paper, a terahertz-wave parametric oscillator (TPO) based on laser light scattering from the lowest A/sub 1/symmetry polariton mode of LiNbO/sub 3/ was used to generate coherent tunability and coherency.
Journal ArticleDOI
Development and future prospects of terahertz technology
TL;DR: In this article, the authors reviewed the developments in terahertz (THz) wave technology and discussed the future prospects of this field. But they did not discuss the applications of THz technology.
Journal ArticleDOI
Intrinsic picosecond response times of Y–Ba–Cu–O superconducting photodetectors
M. Lindgren,Marc Currie,C. Williams,T. Y. Hsiang,Philippe M. Fauchet,Roman Sobolewski,S.H. Moffat,Robert A. Hughes,John S. Preston,Frank A. Hegmann +9 more
TL;DR: In this paper, the femtosecond time-resolved measurements on the photoresponse of an epitaxial YBa2Cu3O7−x (YBCO) thin-film photodetector, patterned into a microbridge geometry, were reported.