| Autor: |
Johnson, S. G., Povinelli, M. L., Soljačić, M., Karalis, A., Jacobs, S., Joannopoulos, J. D. |
| Předmět: |
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| Zdroj: |
Applied Physics B: Lasers & Optics; Jul2005 Part 2, Vol. 81 Issue 2/3, p283-293, 11p |
| Abstrakt: |
We present predicted relative scattering losses from sidewall roughness in a strip waveguide compared to an identical waveguide surrounded by a photonic crystal with a complete or incomplete gap in both 2d and 3d. To do so, we develop a new semi-analytical extension of the classic “volume-current method” (Green’s functions with a Born approximation), correcting a longstanding limitation of such methods to low-index contrast systems (the classic method may be off by an order of magnitude in high-contrast systems). The resulting loss predictions show that even incomplete gap structures such as photonic-crystal slabs should, with proper design, be able to reduce losses by a factor of two compared to an identical strip waveguide; however, incautious design can lead to increased losses in the photonic-crystal system, a phenomena that we explain in terms of the band structure of the unperturbed crystal. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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