Physics

Prof. Achanta Venu Gopal
TIFR - Mumbai

Surface plasmon polariton (SPP) mediated local field enhancement and enhanced transmission are of interest to modulate the optical properties of materials and to control light-matter interaction. Metamaterials that are dispersion engineered plasmonic crystals (periodic sub-wavelength structures) offer discrete resonances and we demonstrated several applications [1-5]. For broadband applications, plasmonic quasicrystals (PlQCs) offer several advantages over plasmonic crystals [6-8]. There is also growing interest in all-dielectric metamaterials as an alternative to lossy plasmonic metamaterials.

In this talk, I will present plasmonic and all-dielectric metasurfaces in the form of quasiperiodic airhole arrays. I will also present a new class of optical material that conforms to reflectionless potential [9].