Polarization Direction Of Incident Wave Research Articles

Electric field effect on anisotropic nonlinear optical properties of GaN/AlN quantum dots with multitype-tunable shape

A new investigation on anisotropic nonlinear optical properties of GaN/AlN quantum dots with multitype-tunable shape under electric field have been performed in the effective mass approximation. By means of the finite difference method, the results show that continuously graded elliptic-like quantum dots have higher polarization stability on nonlinear coefficients. The enhancement and abort of the second-harmonic generation, the optical rectification and third-harmonic generation coefficients strongly depend on the asymmetry of quantum dots, the electric field strength and direction, and polarization direction of incident wave.

Resonator with orthogonally polarized dual wavelength output based on layered anisotropic metamaterials

The transmission properties of a resonator based on one air layer sandwiched by two-layered anisotropic metamaterials with different negative-permittivity tensors are studied through analytical analysis and numerical calculations. The resonator has orthogonally polarized dual wavelength output. The difference of the two wavelengths can be adjusted through changing the permittivity tensors, and the ratio of the intensities of the two orthogonally polarized waves can also be adjusted through changing the polarization direction of incident wave. The study results may find applications in the design of laser resonator.