META Conference, META'12

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Coupling of Surface Plasmon with GaAs/AlGaAs Quantum Well Emission by Gold Nanoparticle Arrays
hongwei Gao, Ning Xiang, Jun Lu, Kar Hoo Tung, Soo Jin Chua, Jinghua Teng

Last modified: 2012-01-05


Abstract: Coupling of localized surface plasmon resonance with Quantum Well (QW) emission was investigated via a period gold nanoparticle arrays on GaAs/AlGaAs QW.Gold nanoparticle arrays were fabricated by laser interference lithography. Plasmonic resonance wavelength was tuned by ajusting the size and shape of gold nanoparticles. Coupling effect was characterized by photoluminence.



    The enhancement of electron-hole recombination rate in a semiconductor quantum well (QW) through the coupling between the dipoles in the QW and the surface plasmons generated by metallic structure has the potential to play important role in future optical devices [1-3]. Coupling of surface plasmon with QW emission by the compact structure of gold grating on the AlGaAs/GaAs QW has been reported [4].   Two-dimensional nanoparticle arrays would generate localized surface plasmon providing better confinement of light than that of one-dimensional gratings at the resonant wavelength.  We will demonstrate the coupling of localized surface plasmon and GaAs/AlGaAs QW emission by covering the QW sample with gold nanoparticle arrays. Gold nanoparticle arrays are fabricated by laser interference lithography (LIL). Plasmonic resonance frequency is tuned by adjusting the diameter and the shape of gold nanoparticles to match the QW emission. The coupling effect on QW emission is characterized by photoluminescence (PL). Simulation and experimental results will be compared and discussed.



Localized surface plasmon; quantum well; coupling