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.

Third-Harmonic Generation in Special Parabolic Quantum Wells

2013 ◽  
Vol 760-762 ◽  
pp. 392-396
Author(s):  
You Bin Yu
Keyword(s):  
Quantum Well ◽  
Density Matrix ◽  
Quantum Wells ◽  
Harmonic Generation ◽  
Third Harmonic Generation ◽  
Third Harmonic ◽  
The Third ◽  
Compact Density ◽  
Asymmetric Quantum ◽  
Parabolic Quantum Wells

Third-harmonic generation in a special asymmetric quantum well is investigated. The third-harmonic generation coefficient is carried out by applying compact-density-matrix method. The numerical results are presented for a GaAs/AlGaAs asymmetric quantum well. The very large third-harmonic generation coefficient is obtained in this quantum well. Moreover, the third-harmonic generation coefficient dependents on the quantum well parameters are investigated, respectively.

THIRD-HARMONIC GENERATION OF WURTZITEGaN-BASED COUPLING QUANTUM WELLS WITH STRONG BUILT-IN ELECTRIC FIELDS

2007 ◽  
Vol 21 (27) ◽  
pp. 1837-1845 ◽  
Author(s):  
LI ZHANG
Keyword(s):  
Quantum Well ◽  
Density Matrix ◽  
Quantum Wells ◽  
Electric Fields ◽  
Harmonic Generation ◽  
Structural Parameters ◽  
Third Harmonic Generation ◽  
Matrix Approach ◽  
Third Harmonic ◽  
The Third

Based on the density matrix approach and iterative treatment, the third-harmonic generation (THG) susceptibility of a wurtzite nitride coupling quantum well (CQW) with strong built-in electric fields have been theoretically investigated. The band non-parabolicity effect of nitride heterostructures has been taken into account. A typical wurtzite AlGaN/GaN CQW are chosen to perform numerical calculations. The result shows that, the THG coefficients sensitively depend on the structural parameters of the CQW system. Moreover, a strong THG process can be realized in the nitride CQW by choosing a group of appropriate structural parameters and doped fraction.

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 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.

Enhancement of the third harmonic generation during interaction of several beams

2018 ◽  
Author(s):  
D.V. Mokrousova ◽  
G.E. Rizaev ◽  
A.V. Shalova ◽  
D.E. Shipilo ◽  
N.A. Panov ◽  
...  
Keyword(s):  
Harmonic Generation ◽  
Third Harmonic Generation ◽  
Third Harmonic ◽  
The Third
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