Poly(dimethylsiloxane) Waveguides Integrated with Microfluidics for Absorbance Measurement

Author

Kee, J.S. ; Poenar, D.P. ; Neuzil, P. ; Yobas, L.

Author_Institution

A*STAR, Nanyang Technol. Univ., Singapore

fYear

2008

fDate

8-11 Dec. 2008

Firstpage

1

Lastpage

4

Abstract

The monolithic integration of poly(dimethylsiloxane) (PDMS) waveguides with microfluidics is presented. Silicone oil is added in PDMS precursor to tune the refractive index of waveguides with air as the side and top cladding layer. Curved and straight waveguides are characterized for their insertion loss mainly due to propagation, radiation, and transition. For the integrated system, real-time absorbance measurement of fluorescein streams yields a linear response 250 muM and with a limit of detection <50 muM. The amount of stray light has been reduced with the 90deg curved waveguide configuration and shows a two-fold increase of sensitivity in the absorbance measurement as compared with straight waveguides configuration.

Keywords

bioMEMS; integrated optics; lab-on-a-chip; micro-optomechanical devices; optical losses; refractive index; PDMS precursor; curved waveguide configuration; fluorescein stream; lab-on-a-chip optical detection; microfluidics; poly(dimethylsiloxane) waveguide integrated system; real-time absorbance measurement; refractive index; straight waveguide configuration; waveguide insertion loss; Insertion loss; Microfluidics; Monolithic integrated circuits; Optical propagation; Petroleum; Propagation losses; Real time systems; Refractive index; Stray light; Waveguide transitions;

fLanguage

English

Publisher

ieee

Conference_Titel

PhotonicsGlobal@Singapore, 2008. IPGC 2008. IEEE

Conference_Location

Singapore

Print_ISBN

978-1-4244-3901-0

Electronic_ISBN

978-1-4244-2906-6

Type

conf

DOI

10.1109/IPGC.2008.4781396

Filename

4781396