Waveguides surfaces, patterning

Horvath, R. Cottier, K., Imageless microscopy of surface patterns using optical waveguides, Appl. Phys. B 2008, 91, 319 327... 

Fig. 9 Planar-waveguide photonic crystals by a periodic pattern of AuNPs on the waveguide surface, (a) Experimental scheme for a spectral transmission experiment under 0° geometry through the AuNP pattern and the waveguide stmcture. (b) Experimental scheme of a spectral transmission experiment applying waveguide modes...

For a SAW waveguide modulator, an interdigitated, single periodic pattern of metal fingers are deposited directly onto the waveguide surface, as shown in (Fig. 3.14), where the transducer has a design... 

Near Field Radiation Pattern—Distribution of the irradiance over an emitting surface in other words, over the cross section of an optical waveguide. 

Structuring of polymer films attracts considerable attention, and various radiation sources have been employed to crosslink selectively suitable polymers for, e.g., waveguide fabrication [99], Incompatible polymer blends have been forced into certain demixing morphologies along pre-patterned surfaces [55], Persistent structures could be formed by laser radiation in various nonabsorbing polymer solutions, such as polyisoprene in n-hexane [57, 58],... 

A photoresist pattern was deposited on a nonlinear diazo dye film and then oxygen etched to form a line of nonlinear and linear sections with a 32 pm QPM period. The upper surface was then planarized with a UV cured resin. A raised QPM +/0 channel waveguide was then formed with three more processing steps [104]. Despite the complexity of the fabrication, losses were below 3 dB cm 1 at 1.59 pm and a maximum SHG figure of merit of 4x10 % W 1 cm 2 was obtained [105,106]. 

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