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Efficient transmission of crossing dielectric slot waveguides
Runzhou Su1, Donghua Tang, Weiqiang Ding
1Physics Department, Northeast Forestry University, Harbin, China.
Abstract:
Transmission properties of two crossing dielectric slot waveguides (Si-Air-Si) are investigated using the finite difference in time domain method. Results show that the low transmission of this system mainly results from the reflection and radiation loss rather than the crosstalk. Using a simple method of filling up the crossing slots locally, the reflection, radiation losses and crosstalk are all greatly suppressed. With moderate parameters in this paper, the transmission efficient increases from 35.0% to more than 97% in a wide range of wavelength around 1.55 mm. The results and method presented in this paper may be very useful in the application of slot waveguide in micro and nano photonics.
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