NAPAC2016 - List of Authors (Miao, C.M.)

Paper	Title	Page
TUA4CO04	Simulation of High-Power Tunable THz Generation in Corrugated Plasma Waveguides	460
	C.M. Miao, T.M. Antonsen UMD, College Park, Maryland, USA J. Palastro NRL, Washington,, USA
	Intense, short laser pulses propagating through inhomogeneous plasmas generate terahertz (THz) radiation. We consider the excitation of THz radiation by the interaction between an ultra short laser pulse and a miniature plasma waveguide. Such corrugated plasma waveguides support electromagnetic (EM) channel modes with subluminal phase velocities, thus allowing the phasing matching between the generated THz modes and the ponderomotive potential associated with laser pulse, making significant THz generation possible. Full format PIC simulations and theoretical analysis are conducted to investigate this slow wave phase matching mechanism. We find the generated THz is characterized by lateral emission and a coherent, narrow band spectrum. A range of realistic laser pulse and plasma profile parameters are considered with the goal of increasing the conversion efficiency of optical energy to THz radiation. As an example, a fixed driver pulse (1.66 J) with spot size of 15 μ m and pulse duration of 50 fs excites approximately 83.7 μ J of THz radiation in a 500-μ m-long corrugated waveguide with on axis average density of 10¹⁸ cm^-3.
	Slides TUA4CO04 [3.569 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-TUA4CO04
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Paper

Title

Page

Simulation of High-Power Tunable THz Generation in Corrugated Plasma Waveguides

460

C.M. Miao, T.M. Antonsen
UMD, College Park, Maryland, USA
J. Palastro
NRL, Washington,, USA

Intense, short laser pulses propagating through inhomogeneous plasmas generate terahertz (THz) radiation. We consider the excitation of THz radiation by the interaction between an ultra short laser pulse and a miniature plasma waveguide. Such corrugated plasma waveguides support electromagnetic (EM) channel modes with subluminal phase velocities, thus allowing the phasing matching between the generated THz modes and the ponderomotive potential associated with laser pulse, making significant THz generation possible. Full format PIC simulations and theoretical analysis are conducted to investigate this slow wave phase matching mechanism. We find the generated THz is characterized by lateral emission and a coherent, narrow band spectrum. A range of realistic laser pulse and plasma profile parameters are considered with the goal of increasing the conversion efficiency of optical energy to THz radiation. As an example, a fixed driver pulse (1.66 J) with spot size of 15 μ m and pulse duration of 50 fs excites approximately 83.7 μ J of THz radiation in a 500-μ m-long corrugated waveguide with on axis average density of 10¹⁸ cm^-3.

Slides TUA4CO04 [3.569 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-TUA4CO04

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)