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Cathodoluminescence in Ultrafast Electron Microscopy

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Title
Cathodoluminescence in Ultrafast Electron Microscopy
Author(s)
Ye-Jin Kim; Oh-Hoon Kwon
Publication Date
2021-12-28
Journal
ACS Nano, v.15, no.12, pp.19480 - 19489
Publisher
American Chemical Society
Abstract
Implementing the modern technologies of light-emitting devices, light harvesting, and quantum information processing requires the understanding of the structure-function relations at spatial scales below the optical diffraction limit and time scales of energy and information flows. Here, we distinctively combine cathodoluminescence (CL) with ultrafast electron microscopy (UEM), termed CL-UEM, because CL and UEM synergetically afford the required spectral and spatiotemporal sensitivities, respectively. For color centers in nanodiamonds, we demonstrate the measurement of CL lifetime with a local sensitivity of 50 nm and a time resolution of 100 ps. It is revealed that the emitting states of the color centers can be populated through charge transfer among the color centers across diamond lattices upon high-energy electron beam excitation. The technical advance achieved in this study will facilitate the specific control over energy conversion at nanoscales, relevant to quantum dots and single-photon sources.
URI
https://pr.ibs.re.kr/handle/8788114/11003
DOI
10.1021/acsnano.1c06260
ISSN
1936-0851
Appears in Collections:
Center for Soft and Living Matter(첨단연성물질 연구단) > 1. Journal Papers (저널논문)
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