Structured coherent optical beams including optical vortices, hollow Gaussian beam, and Airy beam have found wide range of applications in variety of fields in science and technology. All existing techniques used to date to generate such beams suffer from different limitations including lower output power and restricted wavelength coverage. On the other hand, interactions of such beams with nonlinear media are mostly unexplored. We have been involved in the study of nonlinear interaction of optical beams with different spatial structures. Here, we discuss our recent results on nonlinear generation of various structured laser beams including optical vortices, perfect vortices, Airy beam, and hollow Gaussian beam and some of their applications
G. K. Samanta, Aadhi A., N. Apurv Chaitanya, and Jabir M. V., "Nonlinear frequency conversion of structured beams and Airy beam optical parametric oscillator," Proc. SPIE 10088, Nonlinear Frequency Generation and Conversion: Materials and Devices XVI, 1008813 (Presented at SPIE LASE: February 02, 2017; Published: 20 February 2017); https://doi.org/10.1117/12.2254969.
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Study of self-shadowing effect as a simple means to realize nanostructured thin films and layers with special attentions to birefringent obliquely deposited thin films and photo-luminescent porous silicon