Integrated photonic filters based on SiC multilayer structures

• Published in: Applied surface science Vol. 275; pp. 185 - 192
• Main Authors: Vieira, M.A., Vieira, M., Louro, P., Silva, V., Fantoni, A.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 15-06-2013; Elsevier
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Numerical and electrical simulations; Optical active filters; Optical sensors; Optoelectronic model; Physics; SiC heterostructures; SiC heterostructures; Optoelectronic model; Optical sensors; Numerical and electrical simulations; Optical active filters; Optical filters; Multilayers; Silicon carbide; Inorganic compounds; Digital simulation; Heterostructures
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2013.01.020

► Tunable WDM converters based on SiC multilayer photonic active filters are analyzed. ► Integrated active long,- and short-pass wavelength filters into capacitive band-pass filters. ► The photonic device combines the demultiplexing operation with the simultaneous photodetection and self amplification of an optical signal. ► The wavelength background and irradiation side control the filter characteristics. ► A numerical simulation and a two building-blocks active circuit are presented.
Combined tunable WDM converters based on SiC multilayer photonic active filters are analyzed. The operation combines the properties of active long-pass and short-pass wavelength filter sections into a capacitive active band-pass filter.
The sensor element is a multilayered heterostructure produced by PE-CVD. The configuration includes two stacked SiC p–i–n structures sandwiched between two transparent contacts. Transfer function characteristics are studied both theoretically and experimentally.
Results show that optical bias activated photonic device combines the demultiplexing operation with the simultaneous photodetection and self amplification of an optical signal acting the device as an integrated photonic filter in the visible range. Depending on the wavelength of the external background and irradiation side, the device acts either as a short- or a long-pass band filter or as a band-stop filter. The output waveform presents a nonlinear amplitude-dependent response to the wavelengths of the input channels. A numerical simulation and a two building-blocks active circuit are presented and give insight into the physics of the device.