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Proceedings Article

Porous silicon waveguide with integrated grating coupler for DNA sensing

[+] Author Affiliations
Xing Wei, Christopher Kang, Guoguang Rong, Sharon M. Weiss

Vanderbilt Univ. (United States)

Scott T. Retterer

Oak Ridge National Lab. (United States)

Proc. SPIE 7167, Frontiers in Pathogen Detection: From Nanosensors to Systems, 71670C (February 1, 2009); doi:10.1117/12.809239
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From Conference Volume 7167

  • Frontiers in Pathogen Detection: From Nanosensors to Systems
  • Baltimore, Maryland, USA | April 23, 2012

abstract

A porous silicon waveguide with integrated grating coupler is demonstrated as a new platform for portable detection of chemical and biological molecules. The two-layer porous silicon waveguide is formed by electrochemical etching and a photoresist grating is fabricated directly on the waveguide core by means of electron beam lithography. Angle-resolved reflectance measurements reveal distinct peaks corresponding to the guided mode. A 0.420° reflectance shift was observed upon 16-base DNA hybridization, which was more than a factor of 5 larger than the observed reflectance shift after exposure to a mismatched DNA sequence.© (2009) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Xing Wei ; Christopher Kang ; Guoguang Rong ; Scott T. Retterer and Sharon M. Weiss
"Porous silicon waveguide with integrated grating coupler for DNA sensing", Proc. SPIE 7167, Frontiers in Pathogen Detection: From Nanosensors to Systems, 71670C (February 1, 2009); doi:10.1117/12.809239; http://dx.doi.org/10.1117/12.809239


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