New Optical Propeties of Nanoholes and Their Applications
Many interesting properties of nanoholes in metal films have been already discovered. However this geometry is very rich and one can expect a lot of new interesting effects there. In my talk I will discuss several new optical effects related with nanoapertures in metal film placed on planar metamaterials (Fig.1).
I will start with discussion of new mechanisms of extraordinary transmission provided by an optical Tamm state which is formed between metal film and planar metamaterials.
Fig.1. Transmission through nanoholes array as a function of wavelength and aperture diameter (left panel) and asymmetry of transmission of light illuminating our perforated film from top ( Tup) and bottom (Tdown) (right panel).
We have shown that total transmission due to optical Tamm states can be as large as 800% and even more (Fig.1, left panel). Then I will discuss nonreciprocal effects which are due to absorption in metal film rather than magnetic field. Here I will show that perforated metal film together with planar metamaterial can provide giant asymmetry in light transmission without any magnetic effects (Fig.1, right panel).
Then I will discuss molecule fluorescence near nanoapertures. Here I will present new analytical and numerical results, which allow to understand clearly this complicated phenomenon. In final part of my talk I will discuss how optical fields near nanoaperture can be used for control of atom dynamics (atom nano-optics).
I would like to thank the Russian Foundation for Basic Research (grants 14-02-00290 and 15-52-52006), the Presidium of the Russian Academy of Sciences, the Russian Quantum Center and the Skolkovo foundation for financial support of this work.
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