期刊
PHYSICAL REVIEW LETTERS
卷 114, 期 19, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.114.197401
关键词
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资金
- French State through the National Agency for Research [ANR-10-EQPX-50]
- French General Directorate for Armament
- Labex NanoSaclay under the name BioCL
- European Union [n312483]
We have measured the second order correlation function [g((2))(tau)] of the cathodoluminescence intensity resulting from the excitation by fast electrons of defect centers in wide band-gap semiconductor nanocrystals of diamond and hexagonal boron nitride. We show that the cathodoluminescence second order correlation function g((2))(tau) of multiple defect centers is dominated by a large, nanosecond zero-delay bunching (g((2))(0) > 30), in stark contrast to their flat photoluminescence g((2))(tau) function. We have developed a model showing that this bunching can be attributed to the synchronized emission from several defect centers excited by the same electron through the deexcitation of a bulk plasmon into few electron-hole pairs.
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