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Coupling Analysis of GaAs-Based Microdisk Lasers With Different External Claddings

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5 Author(s)
Liu, Danyu ; Dept. of Electron. Mater. Eng., Australian Nat. Univ., Canberra, ACT, Australia ; Hattori, H.T. ; Fu, Lan ; Tan, H.H.
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In this paper, we analyze the coupling of light from a GaAs microdisk laser into a waveguide. Starting from an air cladding, we examine several configurations to couple light into the waveguide with different cladding structures aimed to foster light coupling into the waveguide: photonic crystal and metallic (plasmonic cladding). In these coupling schemes, we tried to optimize the coupling of the emitted light into the waveguide, while maintaining a reasonable quality factor to allow the lasing operation of the device. We show that a plasmonic layer, introduced beside the waveguide can lead to a significant improvement in the coupling efficiency, reaching an efficiency close to 80%.

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Lightwave Technology, Journal of  (Volume:27 ,  Issue: 22 )