id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-004995-5jmjejbp	Hunt, Hamish C.	Optofluidic integration for microanalysis	2007-09-11		.txt	text/plain	17310	797	42	Integration of waveguides from which light emerges into a microfluidic channel is an attractive advance upon the use of external lenses or the hybrid integration of individual optical fibres to realise dual-beam traps, in terms of robustness, alignment and potential for mass production. Detection and analysis of chemical and biochemical species in microfluidic systems is challenging due to short optical path-lengths, small sample volumes, and the need to analyse individual particles or molecules. This section reviews optical detection schemes for chemical analysis in microfluidic systems, divided according to the principal optical phenomena employed: scattering, absorption, refractive index, fluorescence, Raman spectroscopy, and thermal lensing. Kamei and Wada (2006) built upon earlier work (Kamei et al 2005) demonstrating microfluidic separation of biomolecules, and realised a detection platform shown in Fig. 11 , which included a 2 mm diameter half-ball lens for fluorescence collection, a microstructured interference filter deposited directly on a pin photodiode, and an aperture through the centre of the detector and filter via which excitation light from a 488 nm frequency-doubled VCSEL was introduced.	./cache/cord-004995-5jmjejbp.txt	./txt/cord-004995-5jmjejbp.txt