Possibilities of manipulating the Rabi frequency and luminescence rate from degenerate-level systems as well as the velocity of self-induced transparency of multi-level media are studied using a unitary transformation. The Rabi frequency and luminescence rate of an electronic system whose ground level is degenerate and coupled to a resonant mode are found to depend on the level of the degeneracy. The velocity of multi-mode optical solitons in a multi-level medium is found to be influenced by the number of propagating resonant pulses. Physical realizations of relevant systems are proposed.
We report on the transport properties of single ZnO nanowires measured as a function of the length/square of radius ratio via transmission line method. The specific contact resistance of the FIB Pt contacts to the ZnO nanowires is determined as low as 1.1×10-5 Ωcm2. The resistivity of the ZnO nanowires is measured to be 2.2×10-2 Ωcm. ZnO nanowire-based UV photodetectors contacted by the FIB-Pt with the photoconductive gain as high as ~108 have been fabricated and characterized.
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