Cathodoluminescence microscopy and spectroscopy of GaN epilayers microstructured using surface charge lithography

DÍAZ-GUERRA, C.; PIQUERAS, J.; VOLCIUC, O.; POPA, V.; TIGINYANU, I. M.

dc.contributor.author	DÍAZ-GUERRA, C.
dc.contributor.author	PIQUERAS, J.
dc.contributor.author	VOLCIUC, O.
dc.contributor.author	POPA, V.
dc.contributor.author	TIGINYANU, I. M.
dc.date.accessioned	2020-10-20T11:56:17Z
dc.date.available	2020-10-20T11:56:17Z
dc.date.issued	2006
dc.identifier.citation	DIAZ-GUERRA, C., PIQUERAS, J. VOLCIUC, O. et al. Cathodoluminescence microscopy and spectroscopy of GaN epilayers microstructured using surface charge lithography. In: Journal of Applied Physics. 2006, V. 100, Iss. 2, pp. 023509. ISSN ‎0021-8979 (print); 1089-7550 (web).	en_US
dc.identifier.uri	https://doi.org/10.1063/1.2214210
dc.identifier.uri	http://repository.utm.md/handle/5014/10850
dc.description	Access full text - https://doi.org/10.1063/1.2214210	en_US
dc.description.abstract	Cathodoluminescence (CL) microscopy and spectroscopy have been used to investigate the optical properties of GaN microstructures patterned by Ar+ ion irradiation and subsequent photoelectrochemical (PEC) etching. Monochromatic CL images and CL spectra reveal an enhancement of several defect-related emission bands in a 10 μm wide area around each microstructure. In addition, columnar nanostructures and nanoetch pits were found in the PEC etched areas. CL emission of the nanocolumns is dominated by free electron to acceptor transitions, while excitonic luminescence prevails in the rest of the etched GaN layers. Investigation of the sidewalls of the microstructures reveals that a CL emission band centered at about 3.41 eV, attributed to excitons bound to structural defects, is effectively suppressed after PEC etching only in the observed nanocolumns.	en_US
dc.language.iso	en	en_US
dc.publisher	American Institute of Physics	en_US
dc.rights	Attribution-NonCommercial-NoDerivs 3.0 United States	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/us/	*
dc.subject	сathodoluminescence microscopy	en_US
dc.subject	spectroscopy	en_US
dc.subject	microstructures	en_US
dc.subject	nanocolumns	en_US
dc.title	Cathodoluminescence microscopy and spectroscopy of GaN epilayers microstructured using surface charge lithography	en_US
dc.type	Article	en_US