Abstract
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 planoconcave binary-staircase lens in the InP/InGaAsP platform, we have experimentally demonstrated at 1.55 μm 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.
Keywords
finite difference time-domain analysis, microlenses, nanotechnology, refractive index
Subject Categories
Nanophotonics, Lenses
Disciplines
Nanoscience and Nanotechnology | Optics
Publisher
American Institute of Physics
Publication Date
2008
Rights Information
Copyright 2008
Rights Holder
American Institute of Physics
Permanent URL
Recommended Citation
Casse, Bernard Didier F.; Banyal, Ravinder K.; Lu, W. T.; Huang, Y. J.; Selvarasah, Selvapraba; Dokmeci, Mehmet R.; and Sridhar, Srinivas, "Nanoengineering of a negative-index binary-staircase lens for the optics regime" (2008). Center for High-Rate Nanomanufacturing Publications. Paper 3. http://hdl.handle.net/2047/d20000887
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Additional Files
figure1.zip (42 kB)Figure 1 - high resolution image
figure2.zip (1512 kB)
Figure 2- high resolution image
figure3.zip (1347 kB)
Figure 3 - high resolution image
figure4.zip (1719 kB)
Figure 4 - high resolution image
Notes
Originally published in Applied Physics Letters, v.92 no.24 (2008). doi:10.1063/1.2942383