Nanoplasmonic lenses for bacteria sorting (Presentation Recording)

Xiangchao Zhu; Ahmet A. Yanik

doi:10.1117/12.2189027

5 October 2015 Nanoplasmonic lenses for bacteria sorting (Presentation Recording)

Xiangchao Zhu, Ahmet A. Yanik

Proceedings Volume 9550, Biosensing and Nanomedicine VIII; 95500L (2015) https://doi.org/10.1117/12.2189027
Event: SPIE Nanoscience + Engineering, 2015, San Diego, California, United States

Abstract

We demonstrate that patches of two dimensional arrays of circular plasmonic nanoholes patterned on gold-titanium thin film enables subwavelength focusing of visible light in far field region. Efficient coupling of the light with the excited surface plasmon at metal dielectric interface results in strong light transmission. As a result, surface plasmon plays an important role in the far field focusing behavior of the nanohole-aperture patches device. Furthermore, the focal length of the focused beam was found to be predominantly dependent on the overall size of the patch, which is in good agreement with that calculated by Rayleigh-Sommerfield integral formula. The focused light beam can be utilized to separate bio-particles in the dynamic range from 0.1 μm to 1 μm through mainly overcoming the drag force induced by fluid flow. In our proposed model, focused light generated by our plasmonic lenses will push the larger bio-particles in size back to the source of fluid flow and allow the smaller particles to move towards the central aperture of the patch. Such a new kind of plasmonic lenses open up possibility of sorting bacterium-like particles with plasmonic nanolenses, and also represent a promising tool in the field of virology.

Conference Presentation

Citation Download Citation

Xiangchao Zhu and Ahmet A. Yanik "Nanoplasmonic lenses for bacteria sorting (Presentation Recording)", Proc. SPIE 9550, Biosensing and Nanomedicine VIII, 95500L (5 October 2015); https://doi.org/10.1117/12.2189027

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available