By Ki Young Kim
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Extra info for Advances in Optical and Photonic Devices
Blue GaN surface-emitting lasers are notoriously difficult to fabricate and we give a couple of recent examples of GaN surface-emitting laser work: First, a photonic crystal based surface emitting laser was developed Japanese researchers where their photonic crystal structure consists of a 2 dimensional array of airholes. Their result is however far from practical applications. , 2008) A Taiwanese group also reported GaN hybrid VCSEL laser work where they used n type crack- free AlN/GaN DBR and Ta2O5/SiO2 dielectric DBR.
100, 033901 (2008) Yoon, J. H. , Single mode photonic quantum ring laser fabricated in hyperboloid drum shape, J. Appl. Phys. 103, 053103 (2008) 3 A Tunable Semiconductor Lased Based on Etched Slots Suitable for Monolithic Integration D. C. Byrne, W. H. Guo, Q. Lu and J. F. Donegan School of Physics, Trinity College Dublin Ireland 1. Introduction Widely tunable semiconductor lasers will play a critical part in future technologies. Tunable lasers are rapidly replacing fixed wavelength lasers in dense wavelength division multiplexing DWDM optical communications.
PQR light sources for display We now discuss the properties of the PQR technology applicable for the next generation display. Light-emitting diodes (LEDs) display has become a multi-million dollar industry, and it is growing. LEDs are under intensive development worldwide for advanced display applications (Schubert, 2003) However, high- power LEDs being bulk devices faces problems like the notorious LED extraction factor associated with internal heating problems, large concentration of impurity scatters, and low modulation frequencies less than MHz ranges.
Advances in Optical and Photonic Devices by Ki Young Kim