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論文

Room temperature quantum emission from cubic silicon carbide nanoparticles

Castelletto, S.*; Johnson, B. C.*; Zachreson, C.*; Beke, D.*; Balogh, I.*; 大島 武; Aharonovich, I.*; Gali, A.*

ACS Nano, 8(8), p.7938 - 7947, 2014/08

Single Photon Sources (SPSs) in cubic (3C) Silicon Carbide (SiC) Nano Particles (NPs) were investigated. As a result, photo luminescence (PL) with broad emission at wavelength ranges between 600 and 800 nm was observed from 3C-SiC NPs at room temperature. The second order photon auto-correlation measurements revealed that defect with the PL characteristic is SPSs. The intensity and stability of the PL increased when samples were irradiated with electrons and subsequently annealed at 500 $$^{circ}$$C. From PL measurements at low temperature and theoretical analysis using spin-polarized density functional theory, the defect can be identified as carbon-antisite carbon-vacancy pair (C$$_{Si}$$V$$_{C}$$).

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