Simultaneous mapping of cathodoluminescence spectra and backscatter diffraction patterns in a scanning electron microscope

Edwards, Paul R., Gunasekar, Naresh, Mckendry, Jonathan J. D., Xie, Enyuan, Gu, Erdan, Dawson, Martin D. and Martin, Robert W. 2024. Simultaneous mapping of cathodoluminescence spectra and backscatter diffraction patterns in a scanning electron microscope. Nanotechnology 35 , 39. 10.1088/1361-6528/ad5dba

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Abstract

Electron backscatter diffraction and cathodoluminescence are complementary scanning electron microscopy modes widely used in the characterisation of semiconductor films, respectively revealing the strain state of a crystalline material and the effect of this strain on the light emission from the sample. Conflicting beam, sample and detector geometries have meant it is not generally possible to acquire the two signals together during the same scan. Here, we present a method of achieving this simultaneous acquisition, by collecting the light emission through a transparent sample substrate. We apply this combination of techniques to investigate the strain field and resultant emission wavelength variation in a deep-ultraviolet micro-LED. For such compatible samples, this approach has the benefits of avoiding image alignment issues and minimising beam damage effects.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Publisher:	IOP Publishing
ISSN:	0957-4484
Date of First Compliant Deposit:	4 July 2024
Date of Acceptance:	2 July 2024
Last Modified:	12 Jul 2024 08:30
URI:	https://orca.cardiff.ac.uk/id/eprint/170271

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