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The photoelectric properties and physical mechanism of AlGaN-based deep ultraviolet light emitting diodes (DUV-LEDs) with the superlattice p-type doping layer (PSL) are studied numerically and compared with the Al-composition (50%) conventional p-type layer AlGaN-based DUV-LEDs. The extraordinary design of DUV-LEDs with varied barrier PSL has been investigated by the advanced physical model of semiconductor...
In order to improve the performance of AlGaN-based deep ultraviolet light-emitting diodes (UV LEDs), the optical and physical properties of AlGaN-based deep UV LEDs with a p-type and thickened last quantum barrier (LQB) are studied numerically. The output power–current performance curves, internal quantum efficiency, electroluminescence intensity, energy band diagrams, distributions of carrier concentrations,...
We design a new type of channel add/drop filter based on photonic crystal ring resonator (PCRR). The dropping efficiency and quality factor of the new type filter are simulated by finite-difference time-domain (FDTD) method. Comparing to the traditional quasi-square-ring PCRR, the new type filter has higher quality factor, and close to 100% dropping efficiency.
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