Organic-based plasmonic emitters for sensing applications

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

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)1383-1388
Number of pages6
JournalApplied Optics
Volume52
Issue number7
DOIs
Publication statusPublished - 2013 Mar 1

Fingerprint

Refractive index
emitters
Wavelength
Fluorophores
Light emission
Biosensors
Glucose
Energy gap
gratings
refractivity
Air
Metals
bioinstrumentation
glucose
wavelengths
light emission
Costs
sensitivity
air
metals

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

Cite this

Chiu, N. F., Huang, T. Y., Kuo, C. C., Lin, C. W., & Lee, J. H. (2013). Organic-based plasmonic emitters for sensing applications. Applied Optics, 52(7), 1383-1388. https://doi.org/10.1364/AO.52.001383

Organic-based plasmonic emitters for sensing applications. / Chiu, Nan Fu; Huang, Teng Yi; Kuo, Chun Chuan; Lin, Chii Wann; Lee, Jiun Haw.

In: Applied Optics, Vol. 52, No. 7, 01.03.2013, p. 1383-1388.

Research output: Contribution to journalArticle

Chiu, NF, Huang, TY, Kuo, CC, Lin, CW & Lee, JH 2013, 'Organic-based plasmonic emitters for sensing applications', Applied Optics, vol. 52, no. 7, pp. 1383-1388. https://doi.org/10.1364/AO.52.001383
Chiu, Nan Fu ; Huang, Teng Yi ; Kuo, Chun Chuan ; Lin, Chii Wann ; Lee, Jiun Haw. / Organic-based plasmonic emitters for sensing applications. In: Applied Optics. 2013 ; Vol. 52, No. 7. pp. 1383-1388.
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