Physics – Optics
Scientific paper
2011-11-18
Physics
Optics
7 pages, 6 figures
Scientific paper
We exploit the versatility provided by metal--dielectric composites to demonstrate controllable coherent perfect absorption (CPA) in a slab of heterogeneous medium. The slab is illuminated by coherent light from both sides, at the same angle of incidence and the conditions required for CPA are investigated as a function of the different geometrical parameters. The simultaneous realization of CPA at two distinct frequencies is also shown. Finally, our calculations clearly elucidate the role of absorption as a necessary prerequisite for CPA.
Agarwal Girish S.
Dutta-Gupta Shourya
Gupta Santanu D.
Martin Olivier J. F.
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