Second harmonic generation by crossed surface plasma waves over a metallic surface

We have tested the possibility of using monomolecular layers of bacteriorhodopsin (BR) for the synthesis of highly sensitive and highly selective sensors based on second harmonic generation and surface plasma waves. We have used various methods to study the optical and nonlinear optical properties of Langmuir-Blodgett films of BR in order to clarify the extent to which specific properties of BR molecules are retained during their transfer from the surface of water to a solid substrate. We show that the second harmonic generation method is efficient for analyzing the molecular orientation and quality of Langmuir-Blodgett films. The experimental nonlinear optical susceptibility of second order BR molecules is 3.4 · 10-11m/V. The relative change in the resonant wave vector is (3.6 ± 0.1)·10-2at an excitation light wavelength of 630 nm. We have obtained a BR spectrum with the effective excitation by incident radiation of surface plasma waves. On the basis of these studies, we have proposed new schemes of biosensors operating on the basis of second harmonic generation and surface plasma resonance caused by fundamental frequency reflection from BR monomolecular layers. This scheme was tested for a model device and demonstrated the possibility of obtaining sensitivities of the order of 1011molecules/cm3.

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Second Harmonic Generation Induced by Surface Plasma Wave on Metallic Surface in the Presence of Wiggler Magnetic Field

10.21203/rs.3.rs-589730/v1 ◽

2021 ◽

Author(s):

Harleen Kaur Dua ◽

Niti Kant ◽

Vishal Thakur

Keyword(s):

Magnetic Field ◽

Second Harmonic Generation ◽

Plasma Wave ◽

Harmonic Generation ◽

Second Harmonic ◽

Attenuated Total Reflection ◽

Metallic Surface ◽

Surface Plasma ◽

Semiconductor Interface ◽

Wiggler Magnetic Field

Abstract Under the influence of wiggler magnetic field, the phenomenon of second harmonic generation at the metal-semiconductor interface, induced by surface plasma wave (SPW) has been investigated. Metals like Cu, Ag and Al, each with a thin layer of n-InSb over it, are considered for our study. Laser light is incident on metal layered on glass prism in attenuated total reflection Kretschmann configuration (ATR) which generates SPW. The SPW further interacts nonlinearly with the electrons of n-type semiconductor layered over the metal, leading to second harmonic generation (SHG). The presence of an external wiggler magnetic field makes the process resonant and helps in phase matching. Relatively more enhancement in the amplitude of the second harmonic is observed for Cu-InSb as compared to Ag-InSb and Al-InSb. Numerical analysis shows that the enhancement in the amplitude of SHG increases with the wiggler magnetic field.

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Second harmonic generation and its interaction with relativistic plasma waves driven by forward Raman instability in underdense plasmas

Physics of Plasmas ◽

10.1063/1.872201 ◽

1997 ◽

Vol 4 (4) ◽

pp. 1127-1131 ◽

Cited By ~ 52

Author(s):

V. Malka ◽

A. Modena ◽

Z. Najmudin ◽

A. E. Dangor ◽

C. E. Clayton ◽

...

Keyword(s):

Second Harmonic Generation ◽

Harmonic Generation ◽

Second Harmonic ◽

Plasma Waves ◽

Relativistic Plasma ◽

Underdense Plasmas

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Second Harmonic Generation of a Laser on a Rippled Metallic Surface

Physica Scripta ◽

10.1238/physica.regular.060a00562 ◽

1999 ◽

Vol 60 (6) ◽

pp. 562-563

Author(s):

J Parashar ◽

R Bharuthram

Keyword(s):

Second Harmonic Generation ◽

Harmonic Generation ◽

Second Harmonic ◽

Metallic Surface

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Second-Harmonic Generation from a Magnetic Buried Interface Enhanced by an Interplay of Surface Plasma Resonances

ACS Photonics ◽

10.1021/ph500382u ◽

2015 ◽

Vol 2 (1) ◽

pp. 20-26 ◽

Cited By ~ 16

Author(s):

Ilya Razdolski ◽

Sergii Parchenko ◽

Andrzej Stupakiewicz ◽

Sergey Semin ◽

Alexander Stognij ◽

...

Keyword(s):

Second Harmonic Generation ◽

Harmonic Generation ◽

Second Harmonic ◽

Surface Plasma

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Parametric excitation of surface plasma waves over a metallic surface by laser in an external magnetic field

Laser and Particle Beams ◽

10.1017/s0263034617000933 ◽

2018 ◽

Vol 36 (1) ◽

pp. 92-97

Author(s):

Prashant Chauhan ◽

Deepika Goel ◽

Anshu Varshney ◽

D. B. Singh ◽

Vivek Sajal

Keyword(s):

Magnetic Field ◽

Growth Rate ◽

Space Charge ◽

Ponderomotive Force ◽

Laser Energy ◽

Incidence Angle ◽

Plasma Waves ◽

Metallic Surface ◽

Surface Plasma ◽

Surface Plasma Waves

AbstractEffects of external static magnetic field (applied in$\hat y$-direction) on resonant excitation of surface plasma waves (SPW) have been investigated over the metal free space interface. The high power laser$({\rm \omega} _0,\;\vec k_{0z})$is incident over the metal surface and exerts a ponderomotive force on the metal electrons in the skin layer. The ponderomotive force disturbs the quasi-neutrality of plasma which results into the excitation of space charge field at the frequency 2ω0. The electron density perturbation at frequency 2ω0driven by self-consistent space charge potential couples with the oscillatory velocity due to the seed SPW$({\rm \omega}, \;\vec k_z)$and produces nonlinear current to drive another counter propagating SPW$({\rm \omega} _1,\;\vec k_{1z})$at the phase matching conditions of frequency ω = ω1− 2ω0and wavenumber$\vec k_z = \vec k_{1z} - 2\vec k{}_{0z}$(by feedback mechanism). The parametric process becomes resonant at 2ω0≈ ωpand the maximum growth rate is achieved for an incidence angle of laser θ = 40°. The growth rate of the process reduces to half on increasing the magnetic field from 0.49 to 2.45 MG. The present study may be significant to the laser absorption experiments where surface rippling can strongly affect the laser energy absorption.

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