Thursday, August 23, 2012

1208.4522 (Damian P. San Roman Alerigi et al.)

Generation of J0-Bessel-Gauss Beam by an heterogeneous refractive index

Damian P. San Roman Alerigi, Tien K. Ng, Ahmed Benslimane, Yaping Zhang, Mohammad Alsunaidi, Boon S. Ooi
In this paper, we present the theoretical studies of a refractive index map to implement a Gauss to J0-Bessel-Gauss convertor. We theoretically demonstrate the viability of such device by solving the inverse electromagnetic problem. The computed conversion e?ficiency is 90%. The theoretical results, obtained from the beam conversion efi?ciency, self-regeneration, and propagation through an opaque obstruction; demonstrate that a 2D graded index map of the refractive index can be used to transform a Gauss beam into a J0-Bessel-Gauss beam. To the best of our knowledge, this is the ?rst demonstration of such beam transformation by means of a 2D index-mapping which is fully integrable in silicon photonics based planar lightwave circuits (PLC). The concept device is signi?cant for the eventual development of a new array of technologies, such as micro optical tweezers, optical traps, beam reshaping and non-linear beam diode lasers.
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