scholarly journals Highly efficient terahertz radiation from a thin foil irradiated by a high-contrast laser pulse

2016 ◽  
Vol 94 (3) ◽  
Author(s):  
Z. Jin ◽  
H. B. Zhuo ◽  
T. Nakazawa ◽  
J. H. Shin ◽  
S. Wakamatsu ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Terahertz Radiation ◽  
Thin Foil ◽  
High Contrast ◽  
Highly Efficient

Electron energy transport in the thin foil driven by high contrast high intensity laser pulse

2012 ◽  
Author(s):  
T. Tanimoto ◽  
M. Nishiuchi ◽  
Y. Mishima ◽  
K. Kikuyama ◽  
T. Morioka ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Electron Energy ◽  
High Intensity ◽  
Energy Transport ◽  
Thin Foil ◽  
High Contrast ◽  
High Intensity Laser ◽  
Intensity Laser

scholarly journals Optically Switchable MeV Ion/Electron Accelerator

2021 ◽  
Vol 11 (12) ◽  
pp. 5424
Author(s):  
Itamar Cohen ◽  
Yonatan Gershuni ◽  
Michal Elkind ◽  
Guy Azouz ◽  
Assaf Levanon ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Electron Accelerator ◽  
Energy Charge ◽  
Thin Foil ◽  
Main Pulse ◽  
Experimental Characterization ◽  
Particle Beams ◽  
Laser Accelerators

The versatility of laser accelerators in generating particle beams of various types is often promoted as a key applicative advantage. These multiple types of particles, however, are generated on vastly different irradiation setups, so that switching from one type to another involves substantial mechanical changes. In this letter, we report on a laser-based accelerator that generates beams of either multi-MeV electrons or ions from the same thin-foil irradiation setup. Switching from generation of ions to electrons is achieved by introducing an auxiliary laser pulse, which pre-explodes the foil tens of ns before irradiation by the main pulse. We present an experimental characterization of the emitted beams in terms of energy, charge, divergence, and repeatability, and conclude with several examples of prospective applications for industry and research.

scholarly journals Equation-of-state studies using a 10-Hz Nd:YAG laser oscillator

2003 ◽  
Vol 21 (4) ◽  
pp. 615-626 ◽  
Author(s):  
M. SHUKLA ◽  
A. UPADHYAY ◽  
V.K. SENECHA ◽  
P. KHARE ◽  
S. BANDYAOPADHYAY ◽  
...  
Keyword(s):  
Equation Of State ◽  
Laser Pulse ◽  
Beam Quality ◽  
Impedance Matching ◽  
Laser System ◽  
Control Unit ◽  
Aluminum Foil ◽  
Single Laser Pulse ◽  
High Contrast ◽  
Single Laser

A commercial mode locked cavity dumped Nd:YAG dye laser operating at 10 Hz repetition rate is modified to produce a high contrast (>5000:1) single laser pulse while maintaining the energy stability and high beam quality. A trigger generator biases the cavity dumping photodiode, which is triggered externally by a pulse from the microprocessor-based control unit controlling a ∼2 J/200 ps laser chain. In the laser chain, the high contrast (>5000:1) is achieved by an external pulse selector based on single Pockel's cell to select a single laser pulse of high contrast, which is a prerequisite for experimental study of the equation of state. Laser-induced shock velocity measurement in thin aluminum, gold on aluminum, and copper on aluminum foil targets using this modified laser system are also presented. The equation of state of Al, Au, and Cu obtained using an impedance matching technique are in agreement with the reported results of SESAME and simulation results.

scholarly journals Highly efficient polarization control using subwavelength high contrast transmitarrays

2015 ◽  
Author(s):  
Amir Arbabi ◽  
Yu Horie ◽  
Mahmood Bagheri ◽  
Andrei Faraon
Keyword(s):  
High Contrast ◽  
Polarization Control ◽  
Highly Efficient

scholarly journals Tunable, high peak power terahertz radiation from optical rectification of a short modulated laser pulse

2006 ◽  
Vol 14 (15) ◽  
pp. 6813 ◽  
Author(s):  
Daniel F. Gordon ◽  
Antonio Ting ◽  
Ilya Alexeev ◽  
Richard Fischer ◽  
Phillip Sprangle ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Terahertz Radiation ◽  
Peak Power ◽  
High Peak ◽  
Optical Rectification ◽  
High Peak Power

scholarly journals Linear and nonlinear absolute phase effects in interactions of ulrashort laser pulses with a metal nano-layer or with a thin plasma layer

2007 ◽  
Vol 25 (3) ◽  
pp. 379-390 ◽  
Author(s):  
S. Varró
Keyword(s):  
Laser Pulse ◽  
Phase Difference ◽  
Plasma Layer ◽  
Thin Foil ◽  
Laser Pulses ◽  
Thomson Scattering ◽  
Carrier Envelope Phase ◽  
Absolute Phase ◽  
High Intensity Laser ◽  
Order Of Magnitude

It has been shown that in the scattered radiation, generated by an ultrashort laser pulse impinging on a metal nano-layer, non-oscillatory wakefields appears with a definite sign. The magnitude of these wakefields is proportional to the incoming field strength, and the definite sign of them is governed by the cosine of the carrier-envelope phase difference of the incoming pulse. When we let such a Wakefield excite the electrons of a secondary target (say an electron beam, a metal surface or a gas jet), we can obtain 100 percent modulation in the electron signal in a given direction. This scheme can serve as a basis for the construction of a robust linear carrier-envelope phase difference meter. At relativistic laser intensities, the target is considered as a plasma layer in vacuum produced from a thin foil by a prepulse, which is followed by the main high-intensity laser pulse. The nonlinearities stemming from the relativistic kinematics lead to the appearance of higher-order harmonics in the scattered spectra. In general, the harmonic peaks are downshifted due to the presence of an intensity-dependent factor. This phenomenon is analogous to the famous intensity-dependent frequency shift in the nonlinear Thomson scattering on a single electron. In our analysis, an attention has also been paid to the role of the carrier-envelope phase difference of the incoming few-cycle laser pulse. It is also shown that the spectrum has a long tail where the heights of the peaks vary practically within one order of magnitude forming a quasi-continuum. Fourier synthesizing the components from this plateau region attosecond pulses has obtained.

scholarly journals Generation of a strong reverse shock wave in the interaction of a high-contrast high-intensity femtosecond laser pulse with a silicon target

2019 ◽  
Vol 114 (25) ◽  
pp. 254103
Author(s):  
Kamalesh Jana ◽  
Amit D. Lad ◽  
Moniruzzaman Shaikh ◽  
V. Rakesh Kumar ◽  
Deep Sarkar ◽  
...  
Keyword(s):  
Shock Wave ◽  
Laser Pulse ◽  
Femtosecond Laser ◽  
Femtosecond Laser Pulse ◽  
High Intensity ◽  
High Contrast ◽  
Reverse Shock ◽  
Silicon Target

High-contrast, high-intensity laser pulse generation using a nonlinear preamplifier in a Ti:sapphire laser system

2008 ◽  
Vol 33 (7) ◽  
pp. 645 ◽  
Author(s):  
Hiromitsu Kiriyama ◽  
Michiaki Mori ◽  
Yoshiki Nakai ◽  
Takuya Shimomura ◽  
Manabu Tanoue ◽  
...  
Keyword(s):  
Laser Pulse ◽  
High Intensity ◽  
Laser System ◽  
Pulse Generation ◽  
High Contrast ◽  
Ti:Sapphire Laser ◽  
High Intensity Laser ◽  
Intensity Laser
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