banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Directional light extraction enhancement from GaN-based film-transferred photonic crystal light-emitting diodes
Rent this article for
View: Figures


Image of FIG. 1.
FIG. 1.

(a) The top-view SEM image of PhCs on FTLED with the lattice constant and the diameter of air holes fabricated with the holography lithography. Inset: the cross-section TEM image shows the PhC depth . (b) The optical micrography showing the blue light distribution across the die operated at low injection current 5 mA. (c) Schematic diagram of the GaN FTLED structure with PhC.

Image of FIG. 2.
FIG. 2.

Free photon band structure calculated with for the TE modes. The red thick lines indicate the collinear coupled modes. The red dash lines indicated the noncollinear coupled bands. The air lines are shown in gray dashed lines. The boxes indicate the experiment regions observed with , 350, and 400 nm.

Image of FIG. 3.
FIG. 3.

(a) Light output power-current curve characteristic of GaN FTLED with PhC and without PhC. The far-field pattern shows the different direction (b) and (c) with PhC at driving current of 50 mA.

Image of FIG. 4.
FIG. 4.

The map of intensity of the extracted light at a fixed wavelength . The wavelength was kept at a constant corresponding to (a) , (b) , and (c) , respectively. Inset: the tittles show Bragg’s diffraction theory fitting with effective refractive index (cyan X of direction, green O of direction, and blue ◻ of direction). The top view of 3D far-field pattern shows three different value (d) 290 nm, (e) 350 nm, and (f) 400 nm, respectively.

Image of FIG. 5.
FIG. 5.

Light enhancement recorded at various output collection angle for GaN PhC FTLEDs with three different .


Article metrics loading...


Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Directional light extraction enhancement from GaN-based film-transferred photonic crystal light-emitting diodes