Photonic-crystal membranes for optical detection of single nano-particles, designed for biosensor application | Zendy

Jon Olav Grepstad | Zendy; Peter Kaspar | Zendy; Olav Solgaard | Zendy; Ib-Rune Johansen | Zendy; Aasmund Sudbø | Zendy

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Photonic-crystal membranes for optical detection of single nano-particles, designed for biosensor application

Author(s) -

Jon Olav Grepstad,

Peter Kaspar,

Olav Solgaard,

Ib-Rune Johansen,

Aasmund Sudbø

Publication year - 2012

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.20.007954

Subject(s) - optics , materials science , microscope , photonic crystal , optical microscope , nano , membrane , biosensor , microscopy , planar , photonics , optoelectronics , diffraction , nanotechnology , scanning electron microscope , physics , chemistry , biochemistry , computer graphics (images) , computer science , composite material

A sensor designed to detect bio-molecules is presented. The sensor exploits a planar 2D photonic crystal (PC) membrane with sub-micron thickness and through holes, to induce high optical fields that allow detection of nano-particles smaller than the diffraction limit of an optical microscope. We report on our design and fabrication of a PC membrane with a nano-particle trapped inside. We have also designed and built an imaging system where an optical microscope and a CCD camera are used to take images of the PC membrane. Results show how the trapped nano-particle appears as a bright spot in the image. In a first experimental realization of the imaging system, single particles with a radius of 75 nm can be detected.

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