Fractal complementary bowtie aperture for confining and enhancing optical magnetic field

Y. Yang; H. T. Dai; X. W. Sun

doi:10.1117/12.907362

22 February 2012 Fractal complementary bowtie aperture for confining and enhancing optical magnetic field

Y. Yang, H. T. Dai, X. W. Sun

Proceedings Volume 8269, Photonic and Phononic Properties of Engineered Nanostructures II; 826927 (2012) https://doi.org/10.1117/12.907362
Event: SPIE OPTO, 2012, San Francisco, California, United States

Abstract

A new kind of bowtie related structures, Sierpinski complementary bowtie aperture (SCBA), is proposed for enhancing and confining optical magnetic field. The magnetic field enhancement factor can be improved with the presence of the fractal. Numerical simulation shows that higher iteration of the SCBA is responsible for the variation of the resonant wavelengths. The magnetic field distributions illustrated 10nm above the output plane prove the magnetic intensity is confined in the sub-wavelength scale. Further investigation demonstrates current can be enhanced in the center of the apertures while electric fields are found to be easier to concentrate at the tiny fractal structures. Magnetic intensity distributions at several resonant points in the spectrum of the third-iteration SCBA are also plotted and the longer wavelength region in near infrared is found to be unsuited for confining magnetic field in SCBA due to weak interaction with the fractals.

Citation Download Citation

Y. Yang, H. T. Dai, and X. W. Sun "Fractal complementary bowtie aperture for confining and enhancing optical magnetic field", Proc. SPIE 8269, Photonic and Phononic Properties of Engineered Nanostructures II, 826927 (22 February 2012); https://doi.org/10.1117/12.907362

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