Printable metallic nanoparticle-induced surface plasmonic resonance enhancement on infrared
photodetector under femtosecond laser frequency comb illumination

Guiru Gu¹, Thitikorn Kemsri^2†, Boyang Xiang², Cheryl Schnitzer³ and Xuejun Lu^2
1Department of Physics & Astronomy, Stonehill College, 320 Washington Street, Easton, MA 02357, USA
²Department of Electrical and Computer Engineering, University of Massachusetts Lowell, One University Avenue, Lowell, MA 01854, USA
³Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA 02357, USA
Dedicated to Prof D V G L N Rao

In this paper, we report surface plasmonic enhancement of printable metallic nanoparticles on a GaAs p-i-n photodetector under a femtosecond (fs) laser frequency comb illumination at the central wavelength of 850-nm. The detection speed of the GaAs p-i-n photodetector is increased from 2.3 GHz to 3.4 GHz. The plasmonic enhancement of the nanoparticles is compared to that of the nano-disk optical antenna array fabricated using the electron-beam (E-beam) photolithography technique. Compared to the E-beam photolithography-made nano-disk optical antennas, the printable nanoparticle approach offers a cost-effective plasmonic enhancement method with a significantly simplified fabrication process and high throughput. © Anita Publications. All rights reserved.
Keywords: Printable nanoparticles, Surface plasmonic enhancement, Optical antennas, Simultaneous enhancement of photodetection bandwidth and sensitivity.

Peer Review Information
Method: Single- anonymous; Screened for Plagiarism? Yes
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