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Start Over Author "Kim, Geun-Ju" Topic silicon
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2. Enhancement of terahertz radiation in a Smith–Purcell backward-wave oscillator by an inverse wet-etched grating

Author

Kim, Jung-Il, Jeon, Seok-Gy, Kim, Geun-Ju, and Kim, Jaehong

Subjects
*SMITH-Purcell effect, *BACKWARD-wave tubes, *SILICON, *ELECTRON beams, *ELECTRIC fields, *NUMERICAL solutions to partial differential equations, *FREQUENCIES of oscillating systems
Abstract

Abstract: A terahertz (THz) Smith–Purcell (SP) backward-wave oscillator with an inverse wet-etched grating based on silicon has been proposed to enhance radiation intensity. This grating strengthens the interactions between an electron beam and the evanescent wave due to the adjacent surface structure between gratings that improves the magnitude of the electric field up to 1.7 times compared to the conventional rectangular gratings. A two-dimensional particle-in-cell (PIC) simulation shows that the radiated power is increased up to 2.3 times higher at the radiated frequency of 0.66 THz for an electron-beam energy of 30 keV. [ABSTRACT FROM AUTHOR]

Published
2011
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