NDLI: Femtosecond laser fabrication of waveguides and microchannels in polymers for optofluidic sensing

Content Provider	IEEE Xplore Digital Library
Author	Eaton, S.M. Pinazo, J.M. Suriano, R. Ramponi, R. Turri, S. Levi, M. Cerullo, G. Osellame, R.
Copyright Year	2009
Description	Author affiliation: Dipartimento di Fisica, Politecnico di Milano, IFN-CNR, ULTRAS-CNR-INFM, Milan, Italy (Eaton, S.M.; Ramponi, R.; Cerullo, G.; Osellame, R.) \|\| Dipartimento di Chimica, Materiali e Ingegneria Chimica, Politecnico di Milano, Milan, Italy (Pinazo, J.M.; Suriano, R.; Turri, S.; Levi, M.)
Abstract	Polymers are an excellent alternative to fused silica glass for optofluidics due to their low cost, flexibility and ease of processing. Femtosecond laser microfabrication is a very promising technology for producing waveguides and channels for optofluidics in dielectrics due to its nonlinear light-material interaction [1]. For waveguide formation, three modification regimes have been identified according to the repetition rate: single pulse (1–100 kHz), heat diffusion and accumulation (100 kHz-2 MHz) and heat accumulation (2–80 MHz) [2]. The moderate repetition rate regime has shown the greatest promise in achieving low waveguide loss and high refractive index change in glasses due to the unique balance between heat diffusion and buildup [2]. This regime is here applied to waveguide writing in poly(methyl methacrylate) (PMMA) for the first time, to improve upon the low [3] and negative [4] index changes previously reported with the single-pulse and heat buildup regimes, respectively. In addition, we report the femtosecond laser fabrication in PMMA of surface microchannels, the second building block for optofluidics, with the aim of developing an integrated optofluidic sensor.
Starting Page	1
Ending Page	1
File Size	892903
Page Count	1
File Format	PDF
ISBN	9781424440795
DOI	10.1109/CLEOE-EQEC.2009.5191548
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-06-14
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Waveguide transitions Optical device fabrication Microchannel Surface morphology Waveguide lasers Laser modes Polymers Ultrafast optics Optical waveguides Optical surface waves
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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