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On-chip GaN-based dual-color micro-LED arrays and their application in visible light communication

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Academic year: 2019

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Figure

Fig. 1. Atomic force microscopy image of the PSS (a) before and (b) after SU-8 coating;(g) green micro-LEDs individually driven at the current density of 318 A/cmplan-view optical micrograph of the blue-green micro-LED array (c) before and (d) aftertransfe
Fig. 2. (a), (b), and (c) Violet, green, and blue micro-LEDs current density-voltage curve,Violet, green, and blue micro-LEDs -6 dB electrical modulation bandwidth as a function ofcurrent density-optical power curve, and electroluminescence spectra, respectively; (d)the current density.
Fig. 3. (a) Blue-green micro-LED array CIE1931 coordinates on the CIE1931 color spacechromaticity diagram and photographs of the device at different biases; (b) blue-violetmicro-LED array CIE1931 color coordinates at different biases; (c) electroluminescencespectra from the blue-green and blue-violet array at different integrated area ratios ofblue-green and blue-violet, respectively.
Fig. 4. Schematic drawing of the experimental set-ups in wavelength division multiplexingdata transmission experiments: (a) set-up 1 (WDM1); (b) set-up 2 (WDM2)
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