Nonspecular Reflective Optics
Abstract
Geometrically decorated twodimensional (2D) discrete surfaces can be more effective than conventional smooth reflectors in managing wave radiation. Constructive nonspecular wave scattering permits the scattering angle to be other than twice that of incidence and can result in gross violations of the law of reflection. Hence significant fraction of the phase space becomes accessible. A wide range of novel reflective behaviors ensues; including the phenomenon of negative reflection were energy transport remains on the same side of the normal. Also, at a critical incidence coherent superposition can force both the transmitted and reflected waves to graze the scattering surface thus synergistically reinforcing the diffractive process in a behavior reminiscent of critical internal reflection of ray optics. We experimentally demonstrate the concept with measurements on a onedimensionally periodic system (grating) where the scattering angle is shown to be an inverse circular function of a function that depends on the diffractive index and the two angles. Excellent agreement is found between experimental data and theory.
 Publication:

arXiv eprints
 Pub Date:
 December 2008
 DOI:
 10.48550/arXiv.0901.0140
 arXiv:
 arXiv:0901.0140
 Bibcode:
 2009arXiv0901.0140D
 Keywords:

 Physics  Optics;
 Physics  Instrumentation and Detectors
 EPrint:
 15 pages including 6 figures