Strain effect on the third-harmonic generation of a two-dimensional GaAs quantum dot in the presence of magnetic field and spin–orbit interaction

AbstractThe combined effects of filamentation and magnetic field on the third-harmonic generation of electromagnetic beams have been investigated considering extended paraxial rays in magneto plasma. The analysis is done using eikonal method in which eikonal and other relevant quantities are extended up to fourth power of r. The time scale of laser beam is chosen such that the relativistic mass variation of electron becomes dominated source of nonlinearity in refractive index. The expression for coupling between ultra-intense laser beam and electron plasma wave due to relativistic nonlinearity has been deduced. Interaction of the seed plasma wave with the incident filamented laser beam excites the plasma wave and generates third harmonics. The expressions for plasma wave power and third-harmonic power have been derived. The effect of the magnetic field on the power of plasma wave and the third-harmonic power has been carried out. The role of magnetic field has been found to decrease the power of plasma wave and so as the power of third harmonic. Our results can be helpful for various laser plasma diagnostics experiments in which magnetic field present externally or generated spontaneously in the high-power laser–plasma interaction.

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Third harmonic generation in quantum dot with Rashba spin orbit interaction

The European Physical Journal B ◽

10.1140/epjb/e2014-40922-x ◽

2014 ◽

Vol 87 (3) ◽

Cited By ~ 14

Author(s):

Manoj Kumar ◽

Sukirti Gumber ◽

Siddhartha Lahon ◽

Pradip Kumar Jha ◽

Man Mohan

Keyword(s):

Quantum Dot ◽

Harmonic Generation ◽

Third Harmonic Generation ◽

Orbit Interaction ◽

Spin Orbit ◽

Spin Orbit Interaction ◽

Third Harmonic ◽

Rashba Spin

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Ultrafast Third-Order Nonlinear Optical Response Excited by fs Laser Pulses at 1550 nm in GaN Crystals

Materials ◽

10.3390/ma14123194 ◽

2021 ◽

Vol 14 (12) ◽

pp. 3194

Author(s):

Adrian Petris ◽

Petronela Gheorghe ◽

Tudor Braniste ◽

Ion Tiginyanu

Keyword(s):

Harmonic Generation ◽

Nonlinear Optical ◽

Laser Pulses ◽

Third Harmonic Generation ◽

High Repetition Rate ◽

Third Order ◽

Third Harmonic ◽

The Third ◽

High Repetition ◽

Gan Crystal

The ultrafast third-order optical nonlinearity of c-plane GaN crystal, excited by ultrashort (fs) high-repetition-rate laser pulses at 1550 nm, wavelength important for optical communications, is investigated for the first time by optical third-harmonic generation in non-phase-matching conditions. As the thermo-optic effect that can arise in the sample by cumulative thermal effects induced by high-repetition-rate laser pulses cannot be responsible for the third-harmonic generation, the ultrafast nonlinear optical effect of solely electronic origin is the only one involved in this process. The third-order nonlinear optical susceptibility of GaN crystal responsible for the third-harmonic generation process, an important indicative parameter for the potential use of this material in ultrafast photonic functionalities, is determined.

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