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A vertically integrated CMOS microsystem for time-resolved fluorescence analysis

Rae, B.R. and Yang, J and Mckendry, Jonathan and Gong, Zheng and Renshaw, D. and Girkin, J.M. and Gu, Erdan and Dawson, Martin and Henderson, R.K. (2010) A vertically integrated CMOS microsystem for time-resolved fluorescence analysis. IEEE Transactions on Biomedical Engineering, 4 (6). pp. 437-444. ISSN 0018-9294

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Abstract

We describe a two-chip micro-scale time-resolved fluorescence analyzer integrating excitation, detection, and filtering. A new 8×8 array of drivers realized in standard low-voltage 0.35-μm complementary metal-oxide semiconductor is bump-bonded to AlInGaN blue micro-pixellated light-emitting diodes (micro-LEDs). The array is capable of producing sample excitation pulses with a width of 777 ps (FWHM), enabling short lifetime fluorophores to be investigated. The fluorescence emission is detected by a second, vertically-opposed 16 × 4 array of single-photon avalanche diodes (SPADs) fabricated in 0.35-μm high-voltage CMOS technology with in-pixel time-gated photon counting circuitry. Captured chip data are transferred to a PC for further processing, including histogramming, lifetime extraction, calibration and background/noise compensation. This constitutes the smallest reported solid-state microsystem for fluorescence decay analysis, replacing lasers, photomultiplier tubes, bulk optics, and discrete electronics. The system is demonstrated with measurements of fluorescent colloidal quantum dot and Rhodamine samples.

Item type: Article
ID code: 36072
Keywords: single-photon avalanche diodes , biophotonics, GaN micro light emitting diodes, biosensors, complementary metal oxide semiconductor , CMOS, integrated circuits, fluorescence, fluorescence lifetime, Physics, Biomedical Engineering
Subjects: Science > Physics
Department: Faculty of Science > Institute of Photonics
Related URLs:
    Depositing user: Pure Administrator
    Date Deposited: 22 Nov 2011 16:21
    Last modified: 28 Mar 2014 05:47
    URI: http://strathprints.strath.ac.uk/id/eprint/36072

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