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Progress In Electromagnetics Research
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BROADBAND NANOANTENNAS FOR PLASMON ENHANCED FLUORESCENCE AND RAMAN SPECTROSCOPIES

By Z. Yong, S. Zhang, Y. Dong, and S. He

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Abstract:
We propose a novel design of broadband plasmonic nanoantenna that is suitable for fluorescence and Raman enhancement. The structure consists of a gold nanoring and bowties at the center. We numerically investigate the near field and far field performance by employing the finite-difference time-domain method. High Purcell enhancement and large SERS are demonstrated in a record wide spectral bandwidth of 700 nm based on a single emitter-antenna configuration. Moreover, unlike a traditional antenna design, the proposed nanoantenna has low heat generation and high field enhancement at the gap simultaneously, when operating off resonance.

Citation:
Z. Yong, S. Zhang, Y. Dong, and S. He, "Broadband Nanoantennas for Plasmon Enhanced Fluorescence and Raman Spectroscopies," Progress In Electromagnetics Research, Vol. 153, 123-131, 2015.
doi:10.2528/PIER15092402
http://www.jpier.org/PIER/pier.php?paper=15092402

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