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Enhanced light emission from an organic photonic crystal with a nanocavity
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View: Figures


Image of FIG. 1.
FIG. 1.

(a) Cross section and top view of an organic PC on a membrane. (b) The molecular structures of and DCM2 used as active materials of the PC. (c) SEM images of a fabricated PC with a nanocavity consisting of a missing air hole in a triangular lattice; the lattice constant and the radius of the air hole are 320 and , respectively.

Image of FIG. 2.
FIG. 2.

The dispersion relation of a 2D PC consisting of an organic/ membrane with air holes. Structural parameters are , , , and . The band gap for the TE-like mode is obtained in the range from .

Image of FIG. 3.
FIG. 3.

(a) PL spectra from different areas; , , and represent the nanocavity area in the PC pattern (, ), the PC pattern area near the nanocavity, and unpatterned area, respectively. (b) PL spectra of PCs with values of . The spectral peak shifts to longer wavelength with .

Image of FIG. 4.
FIG. 4.

(a) PL spectra of PCs with four reduced air holes, which have radii in the range from . The lattice constant and the radius of the regular hole are 340 and , respectively. The dotted line shows the band edge obtained from PWE calculation of a PC with and . (b) SEM images of the fabricated PCs with the modified nanocavities corresponding to the measured PL spectra.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Enhanced light emission from an organic photonic crystal with a nanocavity