Fabrication of High Performance Microlenses for an Integrated Capillary Channel Electrochromatograph with Fluorescence Detection

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We describe the microfabrication of an extremely compact optical system as a key element in an integrated capillary channel electrochromatograph with fluorescence detection. The optical system consists of a vertical cavity surface-emitting laser (VCSEL), two high performance microlenses and a commercial photodetector. The microlenses are multilevel diffractive optics patterned by electron beam lithography and etched by reactive ion etching in fused silica. The design uses substrate-mode propagation within the fused silica substrate. Two generations of optical subsystems are described. The first generation design has a 6 mm optical length and is integrated directly onto the capillary channel-containing substrate. The second ... continued below

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14 p.

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Wendt, J.R.; Warren, M.E.; Sweatt, W.C.; Bailey, C.G.; Matzke, C.M.; Arnold, D.W. et al. July 7, 1999.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM, and Livermore, CA (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

We describe the microfabrication of an extremely compact optical system as a key element in an integrated capillary channel electrochromatograph with fluorescence detection. The optical system consists of a vertical cavity surface-emitting laser (VCSEL), two high performance microlenses and a commercial photodetector. The microlenses are multilevel diffractive optics patterned by electron beam lithography and etched by reactive ion etching in fused silica. The design uses substrate-mode propagation within the fused silica substrate. Two generations of optical subsystems are described. The first generation design has a 6 mm optical length and is integrated directly onto the capillary channel-containing substrate. The second generation design separates the optical system onto its own substrate module and the optical path length is further compressed to 3.5 mm. The first generation design has been tested using direct fluorescence detection with a 750 nm VCSEL pumping a 10{sup {minus}4}M solution of CY-7 dye. The observed signal-to-noise ratio of better than 100:1 demonstrates that the background signal from scattered pump light is low despite the compact size of the optical system and is adequate for system sensitivity requirements.

Physical Description

14 p.

Notes

OSTI as DE00008793

Medium: P; Size: 14 pages

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  • Journal Name: Journal of Vacuum Science & Technology B; Other Information: Submitted to Journal of Vacuum Science & Technology B

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  • Report No.: SAND99-1732J
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 8793
  • Archival Resource Key: ark:/67531/metadc792227

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  • July 7, 1999

Added to The UNT Digital Library

  • Dec. 19, 2015, 7:14 p.m.

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  • April 7, 2017, 2:08 p.m.

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Wendt, J.R.; Warren, M.E.; Sweatt, W.C.; Bailey, C.G.; Matzke, C.M.; Arnold, D.W. et al. Fabrication of High Performance Microlenses for an Integrated Capillary Channel Electrochromatograph with Fluorescence Detection, article, July 7, 1999; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc792227/: accessed July 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.