Modeling and numerical simulation of the optical intensity distribution in double-heterostructure semiconductor lasers

2001 ◽  
Author(s):  
Ladislav Kuna ◽  
Frantisek Uherek
Keyword(s):  
Numerical Simulation ◽  
Semiconductor Lasers ◽  
Intensity Distribution ◽  
Optical Intensity ◽  
Double Heterostructure

scholarly journals New schemes of compact modal LC modulators for control of light spatial structure

2018 ◽  
Vol 190 ◽  
pp. 03006
Author(s):  
Svetlana Kotova ◽  
Alexandra Mayorova ◽  
Sergey Samagin
Keyword(s):  
Numerical Simulation ◽  
Spatial Structure ◽  
Intensity Distribution ◽  
Single Molecules ◽  
Transverse Plane ◽  
Phase Delay ◽  
Light Fields ◽  
Light Passing ◽  
Vortex Field ◽  
Contact Electrodes

The results of numerical simulation of new schemes of compact modal LC spatial modulators are presented. Special configurations of contact electrodes and predetermined values of applied voltages provide the jump in the profile of phase delay of light passing through the modulator or reflecting from it. This leads to the appearance of a vortex field. Ring-shaped light fields and light fields with intensity distribution in the form of two maxima, which rotate in the transverse plane during propagation were obtained. These devices may be valuable for use in the spectroscopy of single molecules.

Numerical simulation of modal gain in electrically pumped organic semiconductor lasers

2004 ◽  
Author(s):  
Christof Pflumm ◽  
Christian Karnutsch ◽  
Martina Gerken ◽  
Uli Lemmer
Keyword(s):  
Numerical Simulation ◽  
Semiconductor Lasers ◽  
Organic Semiconductor ◽  
Modal Gain ◽  
Electrically Pumped

scholarly journals Generation of Optical Vortices by Linear Phase Ramps

2012 ◽  
Vol 2012 ◽  
pp. 1-6
Author(s):  
Sunil Vyas
Keyword(s):  
Numerical Simulation ◽  
Intensity Distribution ◽  
Spatial Light Modulator ◽  
Phase Mask ◽  
Computational Techniques ◽  
Optical Vortices ◽  
Vortex Generation ◽  
Linear Phase ◽  
Light Modulator ◽  
Phase Discontinuity

Generation of optical vortices using linear phase ramps is experimentally demonstrated. When two regions of a wavefront have opposite phase gradients then along the line of phase discontinuity vortices can be generated. It is shown that vortices can evolve during propagation even with the unequal magnitude of tilt in the two regions of the wavefront. The number of vortices and their location depend upon the magnitude of tilt. vortex generation is experimentally realized by encoding phase mask on spatial light modulator and their presence is detected interferometrically. Numerical simulation has been performed to calculate the diffracted intensity distribution from the phase mask, and presence of vortices in the diffracted field is detected by computational techniques.

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