Shape-Dependent Terahertz Radiation Generation Through Nanoparticles

Sharma, Dinkar; Singh, Divya; Malik, Hitendra K.

doi:10.1007/s11468-019-01017-5

Cited by 25 publications

(22 citation statements)

References 37 publications

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“…Since the mixture of SNPs and CNPs is considered in host Ar gas, the total macroscopic density of nanoparticles is expressed as (Sharma et al 2020 ) Where and represents the densities of SNPs and CNPs, respectively. Particle anisotropy is an important factor that leads to self-assembly of NPs in a specific shape.…”

Section: Physical Model and Thz Field Calculationmentioning

confidence: 99%

“…2 ). Previously (Sharma et al 2020 ), THz field generation has reported from mixture of nanoparticles where they used same resonance condition for spherical and cylindrical nanoparticles (with same plasma frequency of electron dynamics) that is inappropriate to consider for the estimation of THz field. We consider different plasmon resonance conditions for different shapes of the nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

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Laser intensity profile based terahertz field enhancement from a mixture of nano-particles embedded in a gas

et al. 2022

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Nano-particle embedded system plays an importance in developing of future terahertz (THz) radiation source for real-world applications. The laser interactions with nanoparticle embedded system can produce a wide range of THz radiation due to plasma oscillations excitation. We investigate THz field generation from the laser-beat wave interaction with a mixture of spherical and cylindrical graphite nanoparticles in argon gas. Different laser intensity distributions such as Gaussian, cosh-Gaussian, flat-top and ring shape laser pulses have been studied in this work. The relevant plasmon resonance conditions with appropriate symmetry of spherical nanoparticles and cylindrical nanoparticles are discussed. THz field is enhanced upto the order of when the laser intensity redistributes along the polarization direction for a ring shape field envelope.

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Section: Physical Model and Thz Field Calculationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Laser intensity profile based terahertz field enhancement from a mixture of nano-particles embedded in a gas

et al. 2022

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“…Particle anisotropy is an important factor that leads to self-assembly of NPs in a specific shape. Experimentally, wet chemical methods have been used widely for production of spherical and cylindrical metal nanoparticles (Sharma et al, 2020;Guerrero-Martínez, 2011). The factors Here, we are assuming that charges are distributed evenly around the nanoparticles and the modulated density of CNPs and SNPs can be written as…”

Section: Physical Model and Thz Field Calculationmentioning

confidence: 99%

Laser Intensity Profile Based Terahertz Field Enhancement from a Mixture of Nano-Particles Embedded in a Gas

Varshney

Singh

Kundu

et al. 2021

Preprint

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Nano-particle embedded system plays an importance in developing of future terahertz (THz) radiation source for real-world applications. The laser interactions with nanoparticle embedded system can produce a wide range of THz radiation due to plasma oscillations excitation. We investigate THz field generation from the laser-beat wave interaction with a mixture of spherical and cylindrical graphite nanoparticles (NPs) in argon gas. Different laser intensity distributions such as Gaussian, cosh-Gaussian, flat-top and ring shape laser pulses have been studied in this work. The relevant plasmon resonance conditions with appropriate symmetry of spherical nanoparticles (SNPs) and cylindrical nanoparticles (CNPs) are discussed. THz field is enhanced upto the order of when the laser intensity redistributes along the polarization direction for a ring shape field envelope.

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“…Nakajima [17] has reviewed the progress of laser driven electron beam and radiation sources and mentioned their various applications. If we focus on the very recent research, we find remarkable work on THz radiation using crystals [18], metal-dielectric layers [19], medium containing nanoparticles [20] and ferromagnetic heterostructures [21]. In optical rectification technique, this has been experimentally shown that the emitted THz radiation depends on the crystal orientation and excitation polarization in the case of BaGa 4 Se 7 crystal [18].…”

Section: Introductionmentioning

confidence: 99%

“…The oblique incidence of a femtosecond laser on W/CoFeB/Pt trilayer heterostructures has shown to scale up the stable THz emission if one uses the remnant magnetization and this can have application in Spintronic Terahertz Emission Microscopy (STEM) in view of its high performance [21]. On the other hand, it has been shown that the emitted THz radiation can be tuned with respect to its power and focus by manipulating the shape and orientation of nanoparticles embedded in a gaseous medium [20].…”

Section: Introductionmentioning

confidence: 99%

Strong Terahertz radiation generation via wakefield in collisional plasma

Malik

Singh

Kumar³

2020

Journal of Taibah University for Science

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The present calculations show that the application of an external magnetic field can generate additional component of the wakefield suitable for Terahertz (THz) radiation generation in a collisional plasma. Based on the approach of perturbation technique under quasi-static approximation, a study is made on the field of emitted radiation pulses from the wakefield when the super-Gaussian laser beams are used. The field of the radiation becomes stronger when stronger magnetic field is applied and the same is the case for the lasers of higher index.

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Shape-Dependent Terahertz Radiation Generation Through Nanoparticles

Cited by 25 publications

References 37 publications

Laser intensity profile based terahertz field enhancement from a mixture of nano-particles embedded in a gas

Laser intensity profile based terahertz field enhancement from a mixture of nano-particles embedded in a gas

Laser Intensity Profile Based Terahertz Field Enhancement from a Mixture of Nano-Particles Embedded in a Gas

Strong Terahertz radiation generation via wakefield in collisional plasma

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