Interaction of powerful laser radiation with the surfaces of semiconductors and metals: nonlinear optical effects and nonlinear optical diagnostics

Akhmanov, S. A.; Emel’yanov, V. I.; Koroteev, N. I.; Семиногов, В. Н.

doi:10.1070/pu1985v028n12abeh003986

Cited by 217 publications

(86 citation statements)

References 109 publications

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“…Further, THG allows studies of hidden symmetries, which are modified by phase transitions or broken by external fields via the interplay of high-order nonlinearities. 34 Recent experimental studies of SHG in EuTe and EuSe, 19,20 and THG in EuTe, 21 have shown that a ferromagnetic component of the magnetic structure and a magnetic-fieldinduced magnetization are responsible for the magneticfield-induced nonlinearities. In the ED approximation the magnetic-field-induced (IED) nonlinear polarization P IED i (3ω) can be written as…”

Section: Crystallographic and Magnetic-field-induced Contributiomentioning

confidence: 99%

Optical third harmonic generation in the magnetic semiconductor EuSe

et al. 2012

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Third harmonic generation (THG) has been studied in europium selenide EuSe in the vicinity of the band gap at 2.1-2.6 eV and at higher energies up to 3.7 eV. EuSe is a magnetic semiconductor crystalizing in centrosymmetric structure of rock-salt type with the point group m3m. For this symmetry the crystallographic and magnetic-fieldinduced THG nonlinearities are allowed in the electric-dipole approximation. Using temperature, magnetic field, and rotational anisotropy measurements, the crystallographic and magnetic-field-induced contributions to THG were unambiguously separated. Strong resonant magnetic-field-induced THG signals were measured at energies in the range of 2.1-2.6 eV and 3.1-3.6 eV for which we assign to transitions from 4f 7 to 4f 6 5d 1 bands, namely involving 5d(t 2g ) and 5d(e g ) states.

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Section: Crystallographic and Magnetic-field-induced Contributiomentioning

confidence: 99%

Optical third harmonic generation in the magnetic semiconductor EuSe

et al. 2012

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“…It may be interference between the incident light and light scattered from surface inhomogeneities [4,5,8,9]. Interference of incident light with induced surface plasmon-polariton waves is also possible [6,7,10]. Thus, initial surface roughness possessing the amplitude comparable with the light wavelength is necessary in both cases.…”

Section: Introductionmentioning

confidence: 99%

“…Laser induced periodic surface structuring can be used in preparation of diffractive elements [1], active surfaces for enhanced Raman scattering [2], incandescent light sources with improved brightness [3]. According to existing concepts, surface structuring is a result of interrelation between optical, thermal and dynamic electronic processes occurring on the interface during laser irradiation [4][5][6][7]. Engaging of different branches of materials science and desire to obtain nanostructures with suitable properties stimulate scientific interest to these laser-structured surfaces.…”

Section: Introductionmentioning

confidence: 99%

“…Such feedback is provided by the temperature difference in the maxima and minima of the interference pattern during the formation of grating. This temperature distribution initiates processes responsible for deepening the relief profile: deformation of surface, melting and evaporation of surface material, possibly, capillary waves on the molten surface or surface acoustic waves [6,7,10]. Sometimes, formation of several overlapping relief structures occurs [5][6][7][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

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Optical properties of the Ti surface structured by femtosecond laser beam

Dolgov¹

2011

Semicond. Phys. Quantum Electron. Optoelectron.

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Abstract. Wavelength-scaled periodic ripples formed on the Ti surface under the action of femtosecond laser irradiation have been investigated. The ripples were oriented in parallel to the incident light polarization. After initial formation of ripples, the following laser induced chemical transformation of metallic Ti into dielectric compound was established using the Raman scattering data. Weak Wood's anomaly in the spectra on light diffracted by the structured Ti surface testifies the minor plasmonic activity.

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“…Further, involvement of high-order nonlinearities into THG allows one to study hidden symmetries modified by phase transitions or external field symmetry breaking. 15 The numerous THG studies have covered gases, plasmas, liquids, liquid crystals, solids, photonic crystals, and metamaterials. Some examples of the THG in magnetically ordered materials can be found in Refs.…”

Section: Introductionmentioning

confidence: 99%

Optical third-harmonic spectroscopy of the magnetic semiconductor EuTe

et al. 2010

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EuTe possesses the centrosymmetric crystal structure m3m of rocksalt type in which the second-harmonic generation is forbidden in electric dipole approximation but the third-harmonic generation ͑THG͒ is allowed. We studied the THG spectra of this material and observed several resonances in the vicinity of the band gap at 2.2-2.5 eV and at higher energies up to 4 eV, which are related to four-photon THG processes. The observed resonances are assigned to specific combinations of electronic transitions between the ground 4f 7 state at the top of the valence band and excited 4f 6 5d 1 states of Eu 2+ ions, which form the lowest energy conduction band. Temperature, magnetic field, and rotational anisotropy studies allowed us to distinguish crystallographic and magnetic-field-induced contributions to the THG. A strong modification of THG intensity for the 2.4 eV band and suppression of the THG for the 3.15 eV band was observed in applied magnetic field. Two main features of the THG spectra were assigned to 5d͑t 2g ͒ and 5d͑e g ͒ subbands at 2.4 eV and 3.15 eV, respectively. A microscopic quantum-mechanical model of the THG response was developed and its conclusions are in qualitative agreement with the experimental results.

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Interaction of powerful laser radiation with the surfaces of semiconductors and metals: nonlinear optical effects and nonlinear optical diagnostics

Cited by 217 publications

References 109 publications

Optical third harmonic generation in the magnetic semiconductor EuSe

Optical third harmonic generation in the magnetic semiconductor EuSe

Optical properties of the Ti surface structured by femtosecond laser beam

Optical third-harmonic spectroscopy of the magnetic semiconductor EuTe

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