Nanophotonic Modulator Using Electromagnetically Induced Transparency

摘要

This report contains three sections. The first addresses the features of Electromagnetically Induced Transparency (bElT) and discusses particular features pertinent to this project including its associated extraordinary dispersion. The second addresses the design of resonant waveguide microring circuits to enhance the optical field inside the cavity according to the finesse, and to control the onset of ST (an nonlinear optical effect) by modulation of microring parameters - the refractive index of the ring or of the inter-ring coupling region. The third describes experimental work in which the active atomic species, praseodymium, has been introduced into the surface layer of a barium titanate crystal, an electra-optic material. Preliminary spectroscopy of praseodymium at cryogenic temperature, requisite for introducing the ElT effects, indicates the direction of continuing work.