T-shaped plasmonic array as a narrow-band thermal emitter or biosensor

C.-M. Wang, Y.-C. Chang, M.N. Abbas, M.-H. Shih, Din-ping Tsai

Research output: Journal article publicationJournal articleAcademic researchpeer-review

51 Citations (Scopus)

Abstract

A T-shaped plasmonic array is proposed for application as an effective thermal emitter or biosensor. The reflection and thermal radiation properties of a T-shaped array are investigated theoretically. The angular dependent reflectance spectrum shows a clear resonant dip at 0.36eV for full polar angles. No other significant localized resonant mode is found in the investigated spectral range from 0.12eV to 0.64eV. According to the Kirchhoff s law, the thermal radiation of the proposed structure can lead to a sharp peak at 3.5 ?m with low sideband emission. We have also found that the T-shaped structure filled with organic material such as PMMA with different thicknesses (10 nm -50 nm) can lead to significant shift of the resonance wavelength. Thus, the T-shaped structure can also be used as a good sensor for organic materials. © 2009 Optical Society of America.
Original languageEnglish
Pages (from-to)13526-13531
Number of pages6
JournalOptics Express
Volume17
Issue number16
DOIs
Publication statusPublished - 3 Aug 2009
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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