Third-harmonic generation in cylindrical parabolic quantum wires with static magnetic fields

2008 ◽  
Vol 403 (1) ◽  
pp. 37-43 ◽  
Author(s):  
Guanghui Wang ◽  
Qi Guo
Keyword(s):  
Magnetic Fields ◽  
Harmonic Generation ◽  
Quantum Wires ◽  
Third Harmonic Generation ◽  
Static Magnetic Fields ◽  
Third Harmonic

ELECTRON–PHONON INTERACTION EFFECTS ON THIRD-HARMONIC GENERATION IN CYLINDRICAL QUANTUM WIRES

2004 ◽  
Vol 18 (01) ◽  
pp. 53-61 ◽  
Author(s):  
YOU-BIN YU ◽  
KANG-XIAN GUO
Keyword(s):  
Iterative Method ◽  
Harmonic Generation ◽  
Quantum Wires ◽  
Third Harmonic Generation ◽  
Matrix Approach ◽  
Phonon Interaction ◽  
Third Harmonic ◽  
Electron Phonon Interaction ◽  
The Third ◽  
Compact Density

The influence of electron–phonon interaction on third-harmonic generation in cylindrical quantum wires are investigated. The third-harmonic generation coefficient is obtained using compact-density-matrix approach and iterative method, and the numerical results are presented for GaAs cylindrical quantum wires. The results show that the third-harmonic generation coefficient is greatly enhanced after taking into consideration the influence of electron–phonon interaction. It is about thirty times larger than that obtained by just considering electron states when electron–phonon resonance is met.

scholarly journals Effect of an Inverse Parabolic Confining Electric Potential on Third Harmonic Generation in Cylindrical Quantum Wires

2018 ◽  
Author(s):  
Moletlanyi Tshipa
Keyword(s):  
Photon Energy ◽  
Harmonic Generation ◽  
Quantum Wires ◽  
Third Harmonic Generation ◽  
Wave Functions ◽  
Third Harmonic ◽  
The Third ◽  
Mass Approximation ◽  
Quantum Numbers ◽  
Parabolic Potential

A theoretical investigation of the effect of an inverse parabolic potential on third harmonic generation in cylindrical quantum wires is presented. The wave functions are obtained as solutions to Schrödinger equation solved within the effective mass approximation. It turns out that peaks of the third harmonic generation susceptibility (THGS) associated with nanowires of small radii occur at larger photon energies as compared to those associated with quantum wires of larger radii. The inverse parabolic potential red-shifts peaks of the THGS, and suppresses the amplitude of the THGS. THGS associated with higher radial quantum numbers is diminished in magnitude and blue-shifted, as a function of the photon energy. As a function of the inverse parabolic potential, the THGS still characterized by peaks, and the peaks shift to lower values of the potential as the photon energy increases.

scholarly journals Prospective THz Gyrotrons for High-Field Magneto-Resonance Spectroscopy

2018 ◽  
Vol 195 ◽  
pp. 01003
Author(s):  
V.L. Bratman ◽  
A.E. Fedotov ◽  
Yu.K. Kalynov ◽  
V.N. Manuilov
Keyword(s):  
Magnetic Fields ◽  
Harmonic Generation ◽  
High Field ◽  
Low Voltage ◽  
High Harmonic ◽  
Third Harmonic Generation ◽  
Resonance Spectroscopy ◽  
Magnetron Injection Gun ◽  
Third Harmonic ◽  
Large Orbit Gyrotron

A high-harmonic Large Orbit Gyrotron and a low-voltage gyrotrino placed inside a spectrometer cryomagnet enable greatly simplify terahertz systems for magneto-resonance spectrometers. Large Orbit Gyrotrons provide a powerful third-harmonic generation at frequencies of 1 THz and 0.394 THz in pulsed and CW regimes, respectively, at significantly lower magnetic fields than conventional gyrotrons. According to simulations the gyrotrino with the voltage of 1.5 kV and frequency of 0.264 THz can generate a power of tens of watts; a possibility to operate at such a low voltage is demonstrated in the existing gyrotron with three-electrode magnetron-injection gun.

scholarly journals Effect of an Inverse Parabolic Confining Electric Potential on Third Harmonic Generation in Cylindrical Quantum Wires

2018 ◽  
Vol 1 (3) ◽  
Author(s):  
Moletlanyi Tshipa
Keyword(s):  
Photon Energy ◽  
Harmonic Generation ◽  
Quantum Wires ◽  
Third Harmonic Generation ◽  
Wave Functions ◽  
Third Harmonic ◽  
The Third ◽  
Mass Approximation ◽  
Quantum Numbers ◽  
Parabolic Potential

A theoretical investigation of the effect of an inverse parabolic potential on third harmonic generation in cylindrical quantum wires is presented. The wave functions are obtained as solutions to Schrödinger equation solved within the effective mass approximation. It turns out that peaks of the third harmonic generation susceptibility (THGS) associated with nanowires of small radii occur at larger photon energies as compared to those associated with quantum wires of larger radii. The inverse parabolic potential red-shifts peaks of the THGS, and suppresses the amplitude of the THGS. THGS associated with higher radial quantum numbers is diminished in magnitude and blue-shifted, as a function of the photon energy. As a function of the inverse parabolic potential, the THGS still characterized by peaks, and the peaks shift to lower values of the potential as the photon energy increases.

scholarly journals Effect of an Inverse Parabolic Confining Electric Potential on Third Harmonic Generation in Cylindrical Quantum Wires

2019 ◽  
Vol 2 (1) ◽  
Author(s):  
Moletlanyi Tshipa
Keyword(s):  
Photon Energy ◽  
Harmonic Generation ◽  
Quantum Wires ◽  
Third Harmonic Generation ◽  
Wave Functions ◽  
Third Harmonic ◽  
The Third ◽  
Mass Approximation ◽  
Quantum Numbers ◽  
Parabolic Potential

A theoretical investigation of the effect of an inverse parabolic potential on third harmonic generation in cylindrical quantum wires is presented. The wave functions are obtained as solutions to Schrödinger equation solved within the effective mass approximation. It turns out that peaks of the third harmonic generation susceptibility (THGS) associated with nanowires of small radii occur at larger photon energies as compared to those associated with quantum wires of larger radii. The inverse parabolic potential red-shifts peaks of the THGS, and suppresses the amplitude of the THGS. THGS associated with higher radial quantum numbers is diminished in magnitude and blue-shifted, as a function of the photon energy. As a function of the inverse parabolic potential, the THGS still characterized by peaks, and the peaks shift to lower values of the potential as the photon energy increases.

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

Materials ◽  
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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