Applications of Photonic Crystals

R. Hahn, P. Feisst, A. Lambrecht, A., Application of photonic crystals for gas detection and sensing, In Photonic Crystals Busch, K., Ed. Wiley VCH Verlag, Weinheim, Germany, 2004, 238 246... 

Other potential applications of photonic crystals include crystals with rows of holes to guide radiation around sharp bends (something that cannot be attained with conventional optical fibres), nanoscopic lasers formed from thin films, ultrawhite pigment formed from a regular array of submicron titanium dioxide particles, radio frequency reflectors for magnetic resonance imaging (MRI) and LEDs. 

The application of photonic crystals (PhCs) is a new direction in gas sensor design (Lambrecht et al. 2007 Siinner et al. 2008 Srivastava et al. 2011 Zhao et al. 2011). The first concept of PhCs was proposed by Yablonovitch (1987) and John (1987) in 1987. Essentially, PhCs contain regularly repeating internal regions of high and low dielectric constant. In particular, as shown in Fig. 6.1, PhCs can consist of periodic arrangements of dielectric materials with different refractive indexes, which can be divided into ID PhCs, 2D PhCs, and 3D PhCs according to the structures. 

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