Ulster University Logo

Ulster Institutional Repository

Leaky Waveguide Devices as Simple Sensitive Optical Detectors for use in μTAS Applications.

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Goddard, NJ, Mohr, S, Singh, K, Holmes, R, Joyce, K, Hulme, JP, Bounaria, AF and Fielden, PR (2000) Leaky Waveguide Devices as Simple Sensitive Optical Detectors for use in μTAS Applications. Proceedings of the MicroTech 2000 Conference, 1 . pp. 27-3. [Journal article]

[img]
Preview
PDF (MicroTECH 2000 - SM) - Accepted Version
273Kb

Abstract

Leaky Waveguide Devices (LWD) are a class of optical waveguide where light is partially confined by reflection mechanisms other than total internal reflection (TIR). Since TIR is not used, the restriction that the waveguide must have a higher refractive index than the surrounding medium can be relaxed. It is then possible to provide lossy waveguiding in channels containing aqueous solutions. Since these reflection mechanisms always provide less than 100% reflectivity, light is gradually lost from the waveguide either by absorption or by radiative loss. Although this means that LWD cannot by used for long-distance light transmission, the typical propagation distances of a few millimetres to a few centimetres is sufficient for most μTAS sensing applications. A novel laminar-flow waveguide cytometer is described which uses Leaky Wave propagation to excite fluorescence.

Item Type:Journal article
Faculties and Schools:Faculty of Computing & Engineering
Faculty of Computing & Engineering > School of Engineering
Research Institutes and Groups:Engineering Research Institute > Nanotechnology & Integrated BioEngineering Centre (NIBEC)
ID Code:940
Deposited By:Dr Richard Holmes
Deposited On:23 Nov 2009 13:45
Last Modified:18 Aug 2011 11:46

Repository Staff Only: item control page