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Self-filtering multilayer S-waveguides with absorption and radiation losses

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5 Author(s)
Cherny, V. ; University of California, Berkeley, Berkeley, CA, USA ; Juravlev, G. ; Kirpa, A. ; Rylov, I.
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This paper investigates guided and leaky modes in four-layer waveguides with sixteen different index cross sections, including theS-shaped refractive index distribution. TheS-form waveguides may result from introduced absorption losses in the outer layer or quasi-single-mode operation with absorption losses of higher-order unwanted modes. Also, the higher value of outer layer index as compared with the core can produce quasi-single-mode operation with radiation losses of higher-order unwanted leaky modes.

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Quantum Electronics, IEEE Journal of  (Volume:15 ,  Issue: 12 )