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|Title:||Optical waveguide mode control by nanoslit-enhanced terahertz field|
|Authors:||Novitsky, Andrey V.|
Jepsen, Peter Uhd
Lavrinenko, Andrei V.
|Citation:||September 15, 2012 / Vol. 37, No. 18 / OPTICS LETTERS|
|Abstract:||The scheme is based on an optimization of the overlap between the optical waveguide mode and the THz field, with the THz field strength enhanced by the presence of a metallic nanoslit surrounding the waveguide. We find an optimum balance between the optical mode attenuation and Kerr-induced change in the propagation constant. The criterion for a π∕2-cumulative phase shift, for instance for application in a Mach–Zehnder interferometer configuration, requires 10 kV∕cm THz field, which in turn is estimated to result in a nonlinear change of the refractive index in the waveguide of 0.001. Our simulations prove that it is quite reasonable to observe the effect experimentally.|
|Appears in Collections:||Кафедра теоретической физики и астрофизики|
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