Photonic crystal-enhanced fluorescence through the extraction of dually polarized modes

Yu An Wu, Po Tsung Wu, Cheng-Sheng Huang*

*Corresponding author for this work

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

In this Letter, we demonstrate that fluorescence detection by using surface-bound fluorescent molecules can be enhanced by coupling the fluorescence emission with dually polarized resonant modes of a photonic crystal (PC) substrate. The PC was fabricated through nanoreplica molding by using a plastic substrate. It was designed such that the transverse magnetic (TM)- and transverse electric (TE)-polarized resonance coincided at a specific combination of the incident angle and the illumination wavelength. During excitation, the nonpolarized emission from cyanine-5 was simultaneously coupled with the TE and TM resonant modes and reradiated into the detection instrument, increasing the fluorescence collection efficiency and thus, enhancing the fluorescence detection.

Original languageEnglish
Pages (from-to)733-735
Number of pages3
JournalOptics Letters
Volume40
Issue number5
DOIs
StatePublished - 1 Mar 2015

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