Fohrmann, Lena SimoneLena SimoneFohrmannPetrov, AlexanderAlexanderPetrovSommer, GerritGerritSommerKrauss, Thomas F.Thomas F.KraussEich, ManfredManfredEich2020-02-242020-02-242016-04-18Proceedings of SPIE - The International Society for Optical Engineering (9885): 98850X-1-98850X-6 (2016)978-1-5106-1246-4978-1-5106-1245-7http://hdl.handle.net/11420/5003We present a concept of a silicon slab based 2D integrating cell where photonic crystal (PhC) reflectors are used in order to confine light in a two-dimensional area to acquire a long propagation length. The evanescent field of the guided wave can be used for sensing applications. We use FDTD simulations to investigate the dependence of the reflectivity of photonic crystal mirrors with a hexagonal lattice. The reflectivity in ΓM direction demonstrates reduced vertical losses compared to the ΓK direction and can be further improved by adiabatically tapering the hole radii of the photonic crystal. A small hexagonal 2D integrating cell was studied with PhC boundaries oriented in ΓM and ΓK direction. It is shown that average reflectivities of 99% can be obtained in a rectangular 2D cell with optimized reflector design, limited only by residual vertical scattering losses at the PhC boundary. This reflectivity is already comparable to the best metallic reflectors.enintegrated opticsphotonic crystalsensingsilicon photonicsTechnikConference Paper10.1117/12.2227849Gerace, DarioDarioGeraceLozano, GabrielGabrielLozanoMonat, ChristelleChristelleMonatRomanov, Sergei G.Sergei G.RomanovConference Paper