Dynamics of semiconductor lasers with two-dimensional distributed feedback

Theoretical and experimental studies of highly selective planar two-dimensional Bragg structures based on dielectric waveguides in the terahertz frequency range

“…the two-dimensional grating in the x and z directions and The fields of TM-polarized eigenmodes of a 2D Bragg resonator [6,7] are defined as the sum of four partial wave fluxes C  are the complex amplitudes slowly varying on the wavelength scale, () fy is the function determining the wave structure in the direction normal to the waveguide surface, which coincides with one of the TM-modes of the indicated waveguide, y E is the y component of the electric field. In this case, the average waveguide thickness is selected so that a single mode propagates in the operatingfrequency range.…”

“…At the Bragg structure given by relation (2), each wave beam under Bragg resonance conditions is scattered in two mutually opposite directions, perpendicularly to the initial propagation direction. Mutual scattering of wave beams under these conditions is described by the equations [6]  …”

“…It should be noted that in lasers based on semiconductor active media, including semiconductor heterostructures [5], planar geometry is a consequence of the epitaxial-lithographic manufacturing technology. According to the theoretical analysis carried out in [6], the use of these structures makes it possible to synchronize the radiation from the active medium characterized by large Fresnel parameters in both transverse directions:…”

Narrowband Spontaneous Emission Amplification from a Conjugated Oligomer Thin Film

“…Among the several types of organic semiconductor materials, conjugated materials have been subjected to intensive research studies for many years [1][2][3][4][5][6][7][8][9]. There has been widespread interest in conjugated materials for applications in optoelectronic devices, such as chemical sensors [10], light-emitting diodes [4,7,9], solar cells [5,11,12], and laser optical media [2,6,[13][14][15][16][17]. Conjugated materials have appealing photophysical properties for the implementation of optical devices, namely, large stoke shift emission, excellent gain, strong absorption, high-quality factor, and the ability to produce tunable lasers [18][19][20].…”

Theoretical and experimental studies of dielectric two-dimensional Bragg structures for development of spatially-extended heterolasers

“…of the dielectric waveguide. According to the theoretical analysis carried out in [6], the use of these structures makes it possible to synchronize the radiation from the active medium characterized by large Fresnel parameters in both transverse directions.…”