In this paper we demonstrate an add/drop filter based on SiC technology. Tailoring of the channel bandwidth and wavelength is experimentally demonstrated. The concept is extended to implement a 1 by 4 wavelength division multiplexer with channel separation in the visible range. The device consists of a p-i'(a-SiC:H)-n/p-i(a-Si:H)-n heterostructure. Several monochromatic pulsed lights, separately or in a polychromatic mixture illuminated the device. Independent tuning of each channel is performed by steady state violet bias superimposed either from the front and back sides. Results show that, front background enhances the light-to-dark sensitivity of the long and medium wavelength channels and quench strongly the others. Back violet background has the opposite behaviour. This nonlinearity provides the possibility for selective removal or addition of wavelengths. An optoelectronic model is presented and explains the light filtering properties of the add/drop filter, under different optical bias conditions.
|Journal||IOP Conference Series: Materials Science and Engineering|
|Publication status||Published - 2014|
|Event||Symposium G on Alternative Approaches of SiC and Related Wide Bandgap Materials in Light Emitting and Solar Cell Applications, Held at the EMRS 2013 Spring Meeting - Strasbourg, France|
Duration: 27 May 2013 → 31 May 2013