Silicon photonic wire biosensor array for multiplexed real-time and label-free molecular detection

被引:152
作者
Densmore, A. [1 ]
Vachon, M. [1 ]
Xu, D. -X. [1 ]
Janz, S. [1 ]
Ma, R. [1 ]
Li, Y. -H. [2 ]
Lopinski, G. [2 ]
Delage, A. [1 ]
Lapointe, J. [1 ]
Luebbert, C. C. [3 ]
Liu, Q. Y. [3 ]
Cheben, P. [1 ]
Schmid, J. H. [1 ]
机构
[1] Natl Res Council Canada, Inst Microstruct Sci, Ottawa, ON K1A 0R6, Canada
[2] Natl Res Council Canada, Steacie Inst Mol Sci, Ottawa, ON K1A 0R6, Canada
[3] Natl Res Council Canada, Inst Biol Sci, Ottawa, ON K1A 0R6, Canada
关键词
HIGH-SENSITIVITY; RESONATOR; SENSORS;
D O I
10.1364/OL.34.003598
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We demonstrate a silicon photonic wire waveguide biosensor array chip for the simultaneous monitoring of different molecular binding reactions. The chip is compatible with automated commercial spotting tools and contains a monolithically integrated microfluidic channel for sample delivery. Each array sensor element is a 1.8-mm-long spiral waveguide folded within a 130 mu m diameter spot and is incorporated in a balanced Mach-Zehnder interferometer with a near temperature independent response. The sensors are arranged in a 400 mu m spacing grid pattern and are addressed through cascaded 1 x 2 optical power splitters using light from a single input fiber. We demonstrate the real-time monitoring of antibody-antigen reactions using complementary and mismatched immunoglobulin G receptor-analyte pairs and bovine serum albumin. The measured level of detection for each sensor element corresponds to a surface coverage of less than 0.3 pg/mm(2). (C) 2009 Optical Society of America
引用
收藏
页码:3598 / 3600
页数:3
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