Fully integrated optical system for lab-on-a-chip applications

Abstract

We present a lab-on-a-chip device featuring a microfluidic dye laser, wave-guides, microfluidic components and photo-detectors integrated on the chip. The microsystem is designed for wavelength selective absorption measurements in the visible range on a fluidic sample, which can be prepared/mixed on-chip. The laser structures, wave-guides and micro-fluidic handling system are defined in a single UV-lithography step on a 10 /spl mu/m thick SU-8 layer on top of the substrate. The SU-8 structures are sealed by a Borofloat glass lid, using polymethylmethacrylate (PMMA) adhesive bonding.