Birefringent porous silicon membranes for optical sensing

Optical sensing nanostructures for porous silicon rugate filters

Porous silicon rugate filters [PSRFs] and combination PSRFs [C-PSRFs] are emerging as interesting sensing materials due to their specific nanostructures and superior optical properties. In this work, we present a systematic study of the PSRF fabrication and its nanostructure/optical characterization. Various PSRF chips were produced with resonance peaks that are adjustable from visible region t...

Porous Silicon Integrated Photonic Devices for Biochemical Optical Sensing

In the last few years, great efforts have been spent in the development of integrated microsystems, devices of few square centimeters in size including microsensors, microfluidic components, reaction chambers, detectors, and so on. More than a simple ensemble of devices, this is a new research field that combines the properties and characteristics of different materials to find innovative and a...

Optical DNA Sensing Based on Resonant Porous Silicon Structures

Porous silicon is a suitable host material for biosensing applications due to its high surface area to volume ratio, which enables substantial infiltration of biomolecules. Resonant waveguides can be fabricated from porous silicon based on a two layer porous silicon structure. Light is coupled into the waveguide only at a particular angle of incidence. Biomolecular binding inside the pores indu...

Terahertz transmission through p + porous silicon membranes

A Microsystem Based on Porous Silicon-Glass Anodic Bonding for Gas and Liquid Optical Sensing

We have recently presented an integrated silicon-glass opto-chemical sensor for lab-on-chip applications, based on porous silicon and anodic bonding technologies. In this work, we have optically characterized the sensor response on exposure to vapors of several organic compounds by means of reflectivity measurements. The interaction between the porous silicon, which acts as transducer layer, an...