Terahertz radiation generation driven by beating of chirped laser pulses in single-walled carbon nanotubes by applying tapered magnetic field

Ghayemmoniri, Z.; Siahmazgi, R. Nemati; Jafari, S.

doi:10.1140/epjd/s10053-023-00612-w

Cited by 7 publications

(3 citation statements)

References 32 publications

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“…Vij et al [24] employed plane-polarized lasers to explore THz radiation using vertically aligned anharmonic carbon nanotubes (CNTs) in a wiggler magnetic field. Ghayemmoniri et al [25] used chirped laser pulses along with a tapered magnetic field to analyse the THz radiation generation from single-walled CNTs. Kumar et al [26,27] employed anharmonic CNTs to study THz radiation in electric and magnetic fields.…”

Section: Introductionmentioning

confidence: 99%

“…The CNTs embedded on metallic surfaces act as a nano-antenna in the proposed study. Similarly, Kumar et al [26] proposed THz radiation through an array of magnetized anharmonic CNTs, while Ghayemmoniri et al [25] investigated THz generation in the presence of an external tapered magnetic field using CNTs. Srivastav and Panwar [46] investigated THz surface magnetoplasmons over an n-type semiconductor with an electron beam in the presence of an external magnetic field by resonant Cherenkov interaction.…”

Section: Introductionmentioning

confidence: 99%

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Magnetic field enhanced terahertz generation from shape-dependent metallic nanoparticles

Simon,

Chauhan

2024

J. Opt.

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This communication deals with the analytical study of terahertz (THz) generation via frequency-difference mechanism using two circularly symmetric Gaussian laser beams with slightly different frequencies ω1 and ω2 and wave vectors k1 and k2 simultaneously propagating through a mixture of spatially corrugated noble-metal nanoparticles. The mixture, consisting of spherical and cylindrical nanoparticles, is placed in a host medium under the influence of an externally applied static magnetic field. The two co-propagating laser beams impart a nonlinear ponderomotive force on electrons of the nanoparticles, causing them to experience nonlinear oscillatory velocity. Further, the consequent nonlinear current density excites terahertz radiation at the beat frequency (=ω1 - ω2). Magnetic field inﬂuences the surface plasmon resonance condition associated with electrons of the nanoparticles due to enhancement in ponderomotive nonlinearities, thereby causing an increment in the amplitude of generated THz field. It is observed that the generated THz radiation has a strong dependence on the shape and size of the nanoparticles in addition to the magnetic field strength. Cylindrical nanoparticles provide greater THz amplitude than spherical nanoparticles due to additional resonance modes, and combining both kinds of nanostructures further enhance the amplitude. THz radiations play an important role in biomedical and pharmaceutical fields, communications, security and THz spectroscopy.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Magnetic field enhanced terahertz generation from shape-dependent metallic nanoparticles

Simon,

Chauhan

2024

J. Opt.

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show abstract

“…The carbon nanotubes embedded on metallic surface acts nano-antenna in the proposed study. Similarly, Kumar et al [16] proposed THz radiation through an array of magnetized anharmonic CNTs while Ghayemmoniri et al [36] investigated THz generation in the presence of an external tapered magnetic field using CNTs. Srivastav and Panwar [37] investigated terahertz (THz) surface magnetoplasmons over n-type semiconductor by an electron beam in the presence of an external magnetic field by resonant Cherenkov interaction.…”

Section: Introductionmentioning

confidence: 99%

Excitation of tunable terahertz radiation from a mixture of nanoparticles in static magnetic field

Simon,

Chauhan

2023

Preprint

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This communication deals with the analytical study of terahertz (THz) generation via beat-wave mechanism of two circularly symmetric Gaussian laser beams with frequencies \({\omega }_{1}\) and \({\omega }_{2}\) and wave vectors \({\overrightarrow{k}}_{1}\) and \({\overrightarrow{k}}_{2}\)simultaneously propagating through a mixture of spatially corrugated noble-metal nanoparticles (NPs). The mixture, consisting of spherical and cylindrical nanoparticles, is placed in argon gas under the influence of a static magnetic field. The two co-propagating laser beams impart a nonlinear ponderomotive force on electrons of the NPs, causing them to experience nonlinear oscillatory velocity. Further, the consequent nonlinear current density excites terahertz radiation at the beat frequency \(\omega (={\omega }_{1}-{\omega }_{2})\). Magnetic field influences the surface plasmon resonance condition associated with electrons of the nanoparticles due to enhancement in ponderomotive nonlinearities, thereby causing an increment in the amplitude of generated THz field. It is observed that the generated THz radiation has a strong dependence on the shape and size of the NPs in addition to the magnetic field strength. Cylindrical nanoparticles provide greater THz amplitude than spherical nanoparticles due to additional resonance modes, and combining both kinds of nanostructures further enhance the amplitude. THz radiations play an important role in biomedical and pharmaceutical fields, communications, security and THz spectroscopy.

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Anomalous absorption of p-polarised laser on metallic surface ingrained with noble-metal nanotubes in the presence of external magnetic field

Simon

Chauhan

2023

Opt Quant Electron

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Terahertz radiation generation driven by beating of chirped laser pulses in single-walled carbon nanotubes by applying tapered magnetic field

Cited by 7 publications

References 32 publications

Magnetic field enhanced terahertz generation from shape-dependent metallic nanoparticles

Magnetic field enhanced terahertz generation from shape-dependent metallic nanoparticles

Excitation of tunable terahertz radiation from a mixture of nanoparticles in static magnetic field

Anomalous absorption of p-polarised laser on metallic surface ingrained with noble-metal nanotubes in the presence of external magnetic field

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