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We demonstrate a compact silicon-on-insulator wavelength division multiplexer. The device supports 21 channels, has 1 nm channel spacing and less than -10 dB crosstalk.
We investigate the use of gratings on porous silicon structures for sensing applications. Examples of two classes of systems are studied: grating-coupled waveguide biosensors, and diffraction-based biosensors.
A silicon waveguide evanescent field molecular sensor interrogated by reflection from a surface grating is demonstrated. The sensor is probed by a beam of light incident at thetas = 45deg through the backside of the silicon-on-insulator (SOI) wafer. The reflected power shows a strong resonant feature near lambda = 1532 nm, arising from resonant coupling of incident beam, guided mode, and the reflected...
We propose to use plasmonic modes in a periodic metal-insulator-metal configuration with metallic gratings to enhance emission from silicon nanocrystals. The modification of emission with a change in grating periodicity is experimentally demonstrated.
An integrated pressure/flow sensor using a direct UV written planar Bragg grating situated inside a flexible diaphragm of thickness 200 mum has been fabricated. The diaphragm is created by etching away the underlying silicon support.
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