Title :
Frequency selective Bragg filters based on (Mg,Zn) (S,Se) waveguides for the visible spectral range
Author :
Eisert, D. ; Bacher, G. ; Forchel, A. ; Leonardi, K. ; Hommel, D.
Author_Institution :
Tech. Phys., Wurzburg Univ., Germany
Abstract :
Bragg grating transmission filters were fabricated on ZnMgSSe-ZnSSe-ZnMgSSe planar optical waveguide structures using a high resolution electron-beam lithographic process. Varying the grating geometry, the filter characteristics like resonance wavelength, modulation contrast, and stopband width can be adjusted. For example, for a L=600-μm-long grating with a period of /spl Lambda/=120 nm, we achieve 16% residual transmission and a spectral width of 4 /spl Aring/ for the designed resonance wavelength of 603 mm. The experimental data can be explained quantitatively with a transfer matrix calculation assuming a coupling coefficient of 40 cm/sup -1/.
Keywords :
II-VI semiconductors; diffraction gratings; electron beam lithography; magnesium compounds; optical communication equipment; optical fabrication; optical planar waveguides; optical waveguide filters; zinc compounds; (Mg,Zn) (S,Se) waveguides; 120 nm; 600 mum; 603 nm; Bragg grating transmission filter fabrication; ZnMgSSe-ZnSSe-ZnMgSSe; ZnMgSSe-ZnSSe-ZnMgSSe planar optical waveguide structures; coupling coefficient; designed resonance wavelength; filter characteristics; frequency selective Bragg filters; grating geometry; high resolution electron-beam lithographic process; long grating; modulation contrast; residual transmission; resonance wavelength; spectral width; stopband width; transfer matrix calculation; visible spectral range; Bragg gratings; Frequency; Geometrical optics; Optical filters; Optical modulation; Optical planar waveguides; Optical waveguides; Planar waveguides; Resonance; Transmission line matrix methods;
Journal_Title :
Photonics Technology Letters, IEEE
