Ultrafast Frequency-Shift Dynamics at Temporal Boundary Induced by Structural-Dispersion Switching of Waveguides

Autor:	Julien Madéo, Fumiaki Miyamaru, Yu Matsubara, Toshihiro Nakanishi, Yosuke Nakata, Joel Pérez-Urquizo, Chihiro Mizuo, Keshav M. Dani, Yusuke Goto, Kakeru Hasebe, Shintaro Nagase
Rok vydání:	2021
Předmět:	Materials science Terahertz radiation business.industry Energy conversion efficiency Physics::Optics General Physics and Astronomy Pulse (physics) law.invention Optical pumping Optics law Dispersion (optics) Time domain business Waveguide Ultrashort pulse
Zdroj:	Physical Review Letters. 127
ISSN:	1079-7114 0031-9007
Popis:	We experimentally demonstrate the observation of a frequency-shift dynamics at a temporal boundary in the terahertz (THz) region relying on a scheme that controls the structural dispersion of a metal-semiconductor waveguide. Ultrafast structural-dispersion switching is achieved within a subpicosecond timescale by illuminating a waveguide surface with an optical pump pulse during the propagation of a THz pulse in the waveguide. Owing to the relatively high conversion efficiency, up to 23%, under the condition that the frequency shift is sufficiently larger than the bandwidth of the incident pulse, the rapid variation of the THz frequency around the temporal boundary is directly observed in the time domain.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d25f4a12161a7473d28bf97349d9f103 https://doi.org/10.1103/physrevlett.127.053902 Zobrazit plný text záznamu