Next Article in Journal
Measuring Accurate Body Parameters of Dressed Humans with Large-Scale Motion Using a Kinect Sensor
Previous Article in Journal
Fluidic Automation of Nitrate and Nitrite Bioassays in Whole Blood by Dissolvable-Film Based Centrifugo-Pneumatic Actuation
Sensors 2013, 13(9), 11350-11361; doi:10.3390/s130911350
Article

Narrow and Deep Fano Resonances in a Rod and Concentric Square Ring-Disk Nanostructures

, * ,
,
,
,
 and
Received: 5 August 2013; in revised form: 20 August 2013 / Accepted: 20 August 2013 / Published: 26 August 2013
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [567 KB, uploaded 21 June 2014]   |   Browse Figures
Abstract: Localized surface plasmon resonances (LSPRs) in metallic nanostructures have been studied intensely in the last decade. Fano interference is an important way to decrease the resonance linewidth and enhance the spectral detection resolution, but realizing a Fano lineshape with both a narrow linewidth and high spectral contrast-ratio is still challenging. Here we propose a metallic nanostructure consisting of a concentric square ring-disk (CSRD) nanostructure and an outside nanorod. Fano linewidth and spectral contrast ratio can be actively manipulated by adjusting the gap between the nanorod and CSRD, and by adjusting the gap between the ring and disk in CSRD. When the gap size in CSRD is reduced to 5 nm, the quadrupolar Fano linewidth is of 0.025 eV, with a contrast ratio of 80%, and the figure of merit reaches 15.
Keywords: Fano resonance; plasmonic nanostructures; optical sensor; Fano linewidth spectral contrast ratio; figure of merit Fano resonance; plasmonic nanostructures; optical sensor; Fano linewidth spectral contrast ratio; figure of merit
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Export to BibTeX |
EndNote


MDPI and ACS Style

Huo, Y.; Jia, T.; Zhang, Y.; Zhao, H.; Zhang, S.; Feng, D.; Sun, Z. Narrow and Deep Fano Resonances in a Rod and Concentric Square Ring-Disk Nanostructures. Sensors 2013, 13, 11350-11361.

AMA Style

Huo Y, Jia T, Zhang Y, Zhao H, Zhang S, Feng D, Sun Z. Narrow and Deep Fano Resonances in a Rod and Concentric Square Ring-Disk Nanostructures. Sensors. 2013; 13(9):11350-11361.

Chicago/Turabian Style

Huo, Yanyan; Jia, Tianqing; Zhang, Yi; Zhao, Hua; Zhang, Shian; Feng, Donghai; Sun, Zhenrong. 2013. "Narrow and Deep Fano Resonances in a Rod and Concentric Square Ring-Disk Nanostructures." Sensors 13, no. 9: 11350-11361.


Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert