Exploiting aperiodic designs in nanophotonic devices

Details Exploiting aperiodic designs in nanophotonic devices Exploiting aperiodic designs in nanophotonic devices

Mar 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012rpph...75c6502m&link_type=abstract

Reports on Progress in Physics, Volume 75, Issue 3, pp. 036502 (2012).

Physics

Scientific paper

In this work we consider the role of aperiodic order—order without periodicity—in the design of different optical devices in one, two and three dimensions. To this end, we will first study devices based on aperiodic multilayered structures. In many instances the recourse to Fibonacci, Thue-Morse or fractal arrangements of layers results in improved optical properties compared with their periodic counterparts. On this basis, the possibility of constructing optical devices based on a modular design of the multilayered structure, where periodic and quasiperiodic subunits are properly mixed, is analyzed, illustrating how this additional degree of freedom enhances the optical performance in some specific applications. This line of thought can be naturally extended to aperiodic arrangements of optical elements, such as nanospheres or dielectric rods in the plane, as well as to three-dimensional photonic quasicrystals based on polymer materials. In this way, plentiful possibilities for new tailored materials naturally appear, generally following suitable optimization algorithms. Then, we present a detailed discussion on the physical properties supporting the preferential use of aperiodic devices in a number of optical applications, opening new avenues for technological innovation. Finally we suggest some related emerging topics that deserve some attention in the years to come.

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