Organic-based plasmonic emitters for sensing applications

Nan Fu Chiu*, Teng Yi Huang, Chun Chuan Kuo, Chii Wann Lin, Jiun Haw Lee


研究成果: 雜誌貢獻期刊論文同行評審

8 引文 斯高帕斯(Scopus)


Plasmonic emissions generated by excitation of an organic layer on a metal grating structure are demonstrated. The emissions correspond to the resonant condition of surface plasmon (SP) modes on the Alq3/Au interface, and the grating structure is coupled to the Au/air interface to provide light emissions. Experimental variations in pitch to control plasmonic bandgap obtained highly directional plasmonic emissions with enhanced intensity. This method is readily applicable for detecting refractive index changes by using SP-coupled fluorophores to obtain emissions of varying wavelengths and viewing angles. The calculations showed that the wavelength of the plasmonic emitter changed from 480 to 680 nm at certain viewing angles, while the concentration of contacting glucose increased from 10% to 40%. Accordingly, a device with a pitch size of 500 nm had a sensitivity of δθe/δn = 37.76° and δn = 1.681 × 10-4 RIU (refractive index unit). Therefore, the proposed approach has potential applications in low-cost, disposable, point-of-care biosensors.

頁(從 - 到)1383-1388
期刊Applied Optics
出版狀態已發佈 - 2013 3月 1

ASJC Scopus subject areas

  • 原子與分子物理與光學
  • 工程(雜項)
  • 電氣與電子工程


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