Observation of Intense Terahertz Radiation from a Laser-Produced Relativistic Plasma Generated on Metal and Plastic Solid Targets

Mun, Jungho; Yea, Kwon-hae; Jeong, Young Uk; Lee, Yong Woo; Ahn, Pil Dong; Lee, Kitae; Ho, Yong; Jin, Hyuk; Park, Seong Hee; Lee, Byung Cheol; Lee, Jun-Young

doi:10.3938/jkps.51.421

Cited by 3 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The electric eld of an electron plasma wave and terahertz wave can be represented as (Hassan et al 2012) \overrightarrow{E} p =\widehat{z}{E}_{p}expi({\omega }_{p}t-{k}_{p}z) (30) and \overrightarrow{E} t+ =\widehat{r}{E}_{t0+}expi({\omega }_{t+}t-{k}_{t+}z) (31) where {E}_{t0+} is amplitude of the right circular polarized THz eld, and \widehat{r}=\widehat{x}+i\widehat{y} (\widehat{x} and \widehat{y} are the unit vectors along the xand y-axis respectively).…”

Section: Evaluation Of the Effective Dielectric Constantmentioning

confidence: 99%

“…Hamster et al (1994) shown experimentally that plasmas produced by high intensity lasers generates coherent Thz radiation. Mun et al (2007) observed an intense Thz radiation from a relativistic plasma on metal and plastic targets irradiated with 10-TW, 30-fs laser pulses. Hussain et al (2014; proposed a scheme for the generation of Thz radiation by ponderomotive/relativistic self-focusing of a hollow Gaussian laser beam in a collissionless magnetized rippled density plasma.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Generation of Efficient Terahertz Radiation by Relativistic Self-Focusing of A Cosh-Gaussian Laser Beam in A Magnetized Plasma

Purohit¹,

Gaur²,

Kothiyal³

et al. 2021

Preprint

View full text Add to dashboard Cite

This paper presents a scheme for the generation of terahertz (THz) radiation by self-focusing of a cosh-Gaussian laser beam in the magnetized and rippled density plasma, when relativistic nonlinearity is operative. The strong coupling between self-focused laser beam and pre-existing density ripple produces nonlinear current that originates THz radiation. THz radiation is produced by the interaction of the cosh-Gaussian laser beam with electron plasma wave under the appropriate phase matching conditions. Expressions for the beamwidth parameter of cosh-Gaussian laser beam and the electric vector of the THz radiation have been obtained using higher-order paraxial theory and solved numerically. The self-focusing of the cosh-Gaussian laser beam and its effect on the generated THz amplitude have been studied for specific laser and plasma parameters. Numerical study has been performed on various values of the decentered parameter, incident laser intensity, magnetic field, and relative density. The results have also been compared with the paraxial region as well as the Gaussian profile of laser beam. Numerical results suggest that the self-focusing of the cosh-Gaussian laser beam and the amplitude of THz radiation increase in the extended paraxial region compared to the paraxial region. It is also observed that the focusing of the cosh-Gaussian laser beam in the magnetized plasma and the amplitude of the THz radiation increases at higher values of the decentered parameter.

show abstract

Section: Evaluation Of the Effective Dielectric Constantmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Generation of Efficient Terahertz Radiation by Relativistic Self-Focusing of A Cosh-Gaussian Laser Beam in A Magnetized Plasma

Purohit¹,

Gaur²,

Kothiyal³

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

Role of contrast of a relativistic femtosecond laser pulse interacting with solid and structured targets

Иванов¹,

Shulyapov²,

Gorlova³

et al. 2021

Quantum Electron.

View full text Add to dashboard Cite

We consider the effect of a pre-plasma layer inevitably present in experiments on the acceleration of electrons and ions during interaction of a relativistic femtosecond laser pulse with a dense plasma. The interaction regimes are identified in which the presence of such a layer can significantly increase the average and maximum energies of electrons. The regimes are discussed in which an artificial nanosecond prepulse makes it possible to produce a collimated electron beam with a high charge and an average energy of up to 10 ponderomotive energies in the direction of the reflected or incident laser beam. It is shown that the acceleration of ions, as a rule, requires an ultrahigh contrast of the laser pulse, since the parameters of the accelerated ion beams deteriorate significantly in the presence of preplasma or due to the evaporation of a thin-film target. The regimes of interaction of laser pulses with thick targets, in which heavy multiply charged ions can be accelerated by cleaning the surface with a prepulse, are also discussed. An essential part of the review is devoted to the interaction of radiation with micro- and nanostructured targets. Both the methods of their fabrication and the issues related to the interaction of a femtosecond laser pulse and its contrast with such structures are considered.

show abstract

Terahertz radiations on target materials irradiated by an ultra-intense laser pulse

Lee

Mun

Lee

et al. 2008

2008 33rd International Conference on Infrared, Millimeter and Terahertz Waves

View full text Add to dashboard Cite

Observation of Intense Terahertz Radiation from a Laser-Produced Relativistic Plasma Generated on Metal and Plastic Solid Targets

Cited by 3 publications

References 0 publications

Generation of Efficient Terahertz Radiation by Relativistic Self-Focusing of A Cosh-Gaussian Laser Beam in A Magnetized Plasma

Generation of Efficient Terahertz Radiation by Relativistic Self-Focusing of A Cosh-Gaussian Laser Beam in A Magnetized Plasma

Role of contrast of a relativistic femtosecond laser pulse interacting with solid and structured targets

Terahertz radiations on target materials irradiated by an ultra-intense laser pulse

Contact Info

Product

Resources

About