Study of Multi-stacked InAs Quantum Dot Infrared Photodetectors Grown by Metal Organic Chemical Vapor Deposition

We report the surface distribution of metal (Ag, Au) nanoparticles grown on polaritypatterned ferroelectric substrates by photochemical reaction. Single crystal periodically polarity-patterned LiNbO 3 (PPLN) was used as a ferroelectric substrate. The nanoparticles were grown by ultra-violet (UV) light exposure of the PPLN in the aqueous solutions including metas. The surface distribution of the grown nanoparticles were measured by atomic force microscopy and identification of the orientation of the polarity of the ferroelectric surface was performed by piezoelectric force microscopy. The Ag-and Au-nanoparticles grown on +z polarity regions are larger and denser than that on -z polarity regions. In particlur, the largest and denser Ag-nanoparticles were grwon on the polarity boundary regions of the PPLN while Au-nanoparticles were not specifically grown on the boundary regions. Thus, we found that the size and position of metal nanoparticles grown on ferroelectric surfaces can be controlled by UV-exposure time and polarity pattern structures. Also, we discuss the difference of the surface distribution of the metal nano-particles depending on the polarity of the ferroelectric surfaces in terms of surface band structures, reduced work fucntion, and inhomogeneous electric field distribution.

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Optical Characteristics of Multi-Stacked InAs/InAlGaAs Quantum Dots

오재원¹,

권세라²,

류미이³

et al. 2011

Journal of the Korean Vacuum Society

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Study of Multi-stacked InAs Quantum Dot Infrared Photodetectors Grown by Metal Organic Chemical Vapor Deposition

Cited by 4 publications

References 13 publications

Effect of Growth Temperature on the Luminescence Properties of InP/GaP Short-Period Superlattice Structures

Effect of Growth Temperature on the Luminescence Properties of InP/GaP Short-Period Superlattice Structures

Growth of Metal Nano-Particles on Polarity Patterned Ferroelectrics by Photochemical Reaction

Optical Characteristics of Multi-Stacked InAs/InAlGaAs Quantum Dots

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