Nanoengineering of a Negative-Index Binary-Staircase Lens for the Optics Regime

Details Nanoengineering of a Negative-Index Binary-Staircase Lens for the Optics Regime Nanoengineering of a Negative-Index Binary-Staircase Lens for the Optics Regime

2008-06-03

arxiv.org/abs/0806.0615v1

Appl. Phys. Lett. 92, 243122 (2008).

Physics

Optics

4 pages, 4 figures

Scientific paper

10.1063/1.2942383

We show that a binary-staircase optical element can be engineered to exhibit an effective negative index of refraction, thereby expanding the range of optical properties theoretically available for future optoelectronic devices. The mechanism for achieving a negative-index lens is based on exploiting the periodicity of the surface corrugation. By designing and nanofabricating a plano-concave binary-staircase lens in the InP/InGaAsP platform, we have experimentally demonstrated at 1.55 microns that such negative-index concave lenses can focus plane waves. The beam propagation in the lens was studied experimentally and was in excellent agreement with the three-dimensional finite-difference time-domain numerical simulations.

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