Details

Autor(en) / Beteiligte

• Zhao, Tao
• Hu, Min
• Zhong, Renbin
• Liu, Diwei
• Wu, Zhenhua
• Gong, Sen
• Liu, Shenggang

Titel

Broadband terahertz frequency comb generation from guided mode resonance excited by fast electrons

Ist Teil von

• 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2019, p.1-2

Ort / Verlag

IEEE

Erscheinungsjahr

2019

Quelle

IEEE Xplore

Beschreibungen/Notizen

• A physical mechanism of generating tunable terahertz (THz) frequency combs (FCs) with ultra-broad bandwidth of >4 THz and high repetition rate above 20 GHz is presented. An analytical model and diffraction theory demonstrate that the equidistant comb modes are generated from the resonance between the modes of a dielectric waveguide and diffraction waves from a grating adjacent to the waveguide excited by fast electrons. Furthermore, a frequency metrology of the THz FC is developed, and demonstrated to be capable of performing high-precision measurements. This mechanism provides a new way to generate THz FCs with broad bandwidth and large frequency spacing.