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OSERC Seminar

Title:Meta-materials/structures applied to plasmonic electromagnetically-induced transparency 

Speaker:Y.P.Lee  Hanyang Univ., Korea 

Location:  Room 616, Physics Building

Time: 13:30-14:30, Tuesday, March 25, 2014

Abstract:
Compared to electromagnetically-induced transparency (EIT) in atom systems, plasmonic EIT (p-EIT) in metamaterials (MMs) has the advantages of room-temperature manipulability, large bandwidth, and the ability to integrate with nano-plasmonic circuits. We have studied the EIT-like effect by coupling between bright and quasi-dark eigenmodes in MMs. The simplicity of structure makes it more convenient for fabrication and miniaturization in the high-frequency regime. We also propose an active control of p-EIT in the MMs based on magnetic plasmon resonance (MPR). According to the picture of MPR-mediated EIT, we show that p-EIT can be achieved even in symmetric structures, when we consider the p-modes beyond the fundamental ones. The optical response is invariant, whereas the restrictions on size are partly relaxed, and thus the fabrication is much easier. Furthermore, the bright and the dark modes can be either coupled or uncoupled, depending on the angle of incidence in the symmetric structure. Another scheme exhibited a switchable classical EIT-like spectral response by changing the polarization angle of incident electromagnetic (EM) wave, so that the scheme can be applied to the EM-wave switching.