Waveguide grating

Several techniques can be employed to couple an optical beam propagating in free space into a thin-film optical waveguide. Grating coupling and prism coupling (Fig. 15.4) are briefly outlined here, since these methods are applied in actual reverse waveguide and MCLW configurations, respectively. 

Figure 2. Schematic layout of an arrayed waveguide grating spectrometer/demultiplexer.

Key words sUicon-on-insulator (SOI), sub-wavelength waveguide grating, grating mirror, finite-difference time-domain (FDTD), numerical simulations, CMOS... 

Highly Efficient Broad-band Waveguide Grating Coupler... 

Figure 3. Coupler efficiency for a waveguide grating with (a) and without (b) the subwavelength grating mirror.

T. W. Ang, G. T. Reed, A. Vonsovici, A. G. R. Evans, P. R. Routley, and M. R. Josey, Effects of grating heights on highly efficient Unibond SOI waveguide grating coupler, IEEE Photon. Tech. Lett. 12, 59-61 (2000). 

Figure 15.29. Arrayed waveguide grating multiplexer with a thin polyimide half-waveplate.

Therefore, various detection principles are applicable to measure the adsorption of a thin layer on a waveguide grating (Fig. 10). This layer may consist of a gas... 

Keywords Microarray DNA microarray Carbohydrate microarray Protein microarray Antibody microarray G protein-coupled receptor microarray Cellular microarray Optical biosensor Resonant waveguide grating biosensor Surface plasmon resonance Dynamic mass redistribution... 

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