Strong Modulations of Optical Reflectance in Tapered Core-Shell Nanowires.
core–shell
nanowires
numerical simulations
optical reflectance
semiconductors
Journal
Materials (Basel, Switzerland)
ISSN: 1996-1944
Titre abrégé: Materials (Basel)
Pays: Switzerland
ID NLM: 101555929
Informations de publication
Date de publication:
31 Oct 2019
31 Oct 2019
Historique:
received:
29
08
2019
revised:
21
10
2019
accepted:
28
10
2019
entrez:
6
11
2019
pubmed:
7
11
2019
medline:
7
11
2019
Statut:
epublish
Résumé
Random assemblies of vertically aligned core-shell GaAs-AlGaAs nanowires displayed an optical response dominated by strong oscillations of the reflected light as a function of the incident angle. In particular, angle-resolved specular reflectance measurements showed the occurrence of periodic modulations in the polarization-resolved spectra of reflected light for a surprisingly wide range of incident angles. Numerical simulations allowed for identifying the geometrical features of the core-shell nanowires leading to the observed oscillatory effects in terms of core and shell thickness as well as the tapering of the nanostructure. The present results indicate that randomly displaced ensembles of nanoscale heterostructures made of III-V semiconductors can operate as optical metamirrors, with potential for sensing applications.
Identifiants
pubmed: 31683526
pii: ma12213572
doi: 10.3390/ma12213572
pmc: PMC6862277
pii:
doi:
Types de publication
Journal Article
Langues
eng
Subventions
Organisme : Spanish Ministry of Economy and Competitiveness
ID : MAT2016-75955-C2-2-R
Organisme : Ministero dell'Istruzione, dell'Università e della Ricerca
ID : PRIN 2017, "Photonic Extreme Learning Machine: from neuromorphic computing to universal optical interpolant, strain gauge sensor and cancer morphodynamic monitor (PELM)"
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