Improved transmission characteristics of moderate refractive index contrast photonic crystal slabs

Autor:	Manfred Eich, G. Böttger, C. Liguda, Markus A. Schmidt
Rok vydání:	2002
Předmět:	Materials science Physics and Astronomy (miscellaneous) business.industry Physics::Optics Optical power Optical field Slot-waveguide Optics Refractive index contrast Radiation mode business Refractive index Photonic crystal Leakage (electronics)
Zdroj:	Applied Physics Letters. 81:2517-2519
ISSN:	1077-3118 0003-6951
DOI:	10.1063/1.1511816
Popis:	Finite two-dimensional (2D)-photonic crystal slab waveguide structures from moderate refractive index materials have been investigated theoretically and results were compared with experimental data. 3D-finite difference time domain (3D-FDTD) simulations reveal a strong dependence of the transmission on the etching depth. For structures with etching depths less than the waveguide core thickness, both a substantial leakage of optical power to the substrate and a spatial mismatch of the transmitted field to the waveguide mode were found, leading to unsatisfactory transmissions. These losses occur mainly on the airband side of the spectrum where the optical field is concentrated in the holes. However, hole depths extending into the substrate by only 0.5 μm lead to an almost perfect mode match at transmission values exceeding 90%.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5c209dc81b470368650b3f459a0b6f06 https://doi.org/10.1063/1.1511816 Zobrazit plný text záznamu