On the mechanism of generation of terahertz electromagnetic radiation upon irradiation of a nanostructured metal surface by femtosecond laser pulses

Gladun, A. D.; Leiman, V. G.; Arsenin, Aleksey V.

doi:10.1070/qe2007v037n12abeh013618

Cited by 4 publications

(2 citation statements)

References 5 publications

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“…Recently, the emission of coherent THz pulses, resulting from ultrafast laser illumination of plain and nano-structured gold (Au) surfaces, was reported by several groups [5][6][7][8][9][10][11][12][13]. Kadlec et al, who used an amplified Ti:sapphire laser to illuminate plain Au films of a few hundred nanometer thickness, observe that the emitted THz fluence depends on the square of the incident pump fluence [5].…”

Section: Introductionmentioning

confidence: 99%

Surface plasmon-enhanced terahertz emission from a hemicyanine self-assembled monolayer

Ramakrishnan¹,

Kumar²,

Planken³

et al. 2012

Opt. Express

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Abstract:Emission of terahertz radiation is observed when surface plasmons are excited on a thin film of gold, in the Kretschmann geometry. When a hemicyanine-terminated alkanethiol self-assembled monolayer of thickness 1.2 nm is deposited on the gold film, stronger terahertz emission is observed. Our experimental results confirm that enhanced terahertz emission is possible from planar gold surfaces when surface plasmons are excited.

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Section: Introductionmentioning

confidence: 99%

Surface plasmon-enhanced terahertz emission from a hemicyanine self-assembled monolayer

Ramakrishnan¹,

Kumar²,

Planken³

et al. 2012

Opt. Express

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“…Thus, nanostructured metallic films may be sources of radiation when they are irradiated by laser pulses [19,20]. Theoretical model for describing this effect has been proposed in [21]. Terahertz wave radiation may occur when magnons are excited by femtosecond laser pulses in anti-ferromagnets [22], or by infrared pulses in diluted magnetic semiconductors [23].…”

Section: Introductionmentioning

confidence: 99%

Radiation and Propagation of Waves in Magnetic Materials with Helicoidal Magnetic Structure

Bychkov¹,

Kuzmin²,

Шавров³

2016

Magnetic Materials

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In this chapter, we are shortly reviewing some problems of electromagnetic and acoustic wave propagation and radiation in the magnets with helicoidal spin structure. We show the band structure of the coupled wave spectrum in the materials. The band gap width depends on the spiral angle (or, equivalently, on external magnetic field value). Interaction of spin and electromagnetic waves leads to opening the gap in spinelectromagnetic dispersion. This gap leads to opacity window in reflection spectrum of spiral magnet plate. The opacity window closes at phase transition into collinear ferromagnetic state and reaches a maximum at simple spiral state. At the frequencies near band gap boundaries, the rotation of polarization plane of propagating electromagnetic wave is observed. Account of interaction of spin and electromagnetic waves with acoustic subsystem leads to opening the gap in spin-acoustic spectrum. This gap leads to some features in electromagnetic reflectance spectrum and to rotation of acoustic wave polarization plane, i.e. to acoustic Faraday effect. We also show the possibility of acoustic and electromagnetic wave radiation by helicoidal magnets at phase transition into collinear ferromagnetic state. Some features of electromagnetic waves generation by spiral magnets placed in homogeneous magnetic field with harmonical time-dependence are also discussed.

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Multiple and multifocal THz emission under external periodic electric field on laser irradiation of spherical and cylindrical nanoparticles

Malik,

Punia

2023

Opt Quant Electron

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On the mechanism of generation of terahertz electromagnetic radiation upon irradiation of a nanostructured metal surface by femtosecond laser pulses

Cited by 4 publications

References 5 publications

Surface plasmon-enhanced terahertz emission from a hemicyanine self-assembled monolayer

Surface plasmon-enhanced terahertz emission from a hemicyanine self-assembled monolayer

Radiation and Propagation of Waves in Magnetic Materials with Helicoidal Magnetic Structure

Multiple and multifocal THz emission under external periodic electric field on laser irradiation of spherical and cylindrical nanoparticles

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