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Strong modulations of optical reflectance in tapered core-shell nanowires
- Source :
- Materials, Materials, MDPI, 2019, 12 (21), pp.3572. ⟨10.3390/ma12213572⟩, Materials, Vol 12, Iss 21, p 3572 (2019), Volume 12, Issue 21, Materials (Basel) 12 (2019). doi:10.3390/ma12213572, info:cnr-pdr/source/autori:Floris F.; Fornasari L.; Bellani V.; Marini A.; Banfi F.; Marabelli F.; Beltram F.; Ercolani D.; Battiato S.; Sorba L.; Rossella F./titolo:Strong modulations of optical reflectance in tapered core-shell nanowires/doi:10.3390%2Fma12213572/rivista:Materials (Basel)/anno:2019/pagina_da:/pagina_a:/intervallo_pagine:/volume:12
- Publication Year :
- 2019
-
Abstract
- Random assemblies of vertically aligned core&ndash<br />shell GaAs&ndash<br />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&ndash<br />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&ndash<br />V semiconductors can operate as optical metamirrors, with potential for sensing applications.
- Subjects :
- Core-shell
Nanowires
Numerical simulations
Optical reflectance
Semiconductors
Nanostructure
Materials science
Shell (structure)
Nanowire
Physics::Optics
Tapering
02 engineering and technology
Numerical simulation
core–shell
01 natural sciences
lcsh:Technology
Article
Settore FIS/03 - Fisica della Materia
Condensed Matter::Materials Science
[SPI]Engineering Sciences [physics]
0103 physical sciences
[CHIM]Chemical Sciences
General Materials Science
Specular reflection
010306 general physics
lcsh:Microscopy
lcsh:QC120-168.85
[PHYS]Physics [physics]
lcsh:QH201-278.5
business.industry
lcsh:T
Heterojunction
021001 nanoscience & nanotechnology
Condensed Matter::Mesoscopic Systems and Quantum Hall Effect
core-shell
nanowires
semiconductors
optical reflectance
numerical simulations
Core (optical fiber)
Semiconductor
lcsh:TA1-2040
Optoelectronics
lcsh:Descriptive and experimental mechanics
lcsh:Electrical engineering. Electronics. Nuclear engineering
0210 nano-technology
business
lcsh:Engineering (General). Civil engineering (General)
lcsh:TK1-9971
Subjects
Details
- Language :
- English
- ISSN :
- 19961944
- Database :
- OpenAIRE
- Journal :
- Materials, Materials, MDPI, 2019, 12 (21), pp.3572. ⟨10.3390/ma12213572⟩, Materials, Vol 12, Iss 21, p 3572 (2019), Volume 12, Issue 21, Materials (Basel) 12 (2019). doi:10.3390/ma12213572, info:cnr-pdr/source/autori:Floris F.; Fornasari L.; Bellani V.; Marini A.; Banfi F.; Marabelli F.; Beltram F.; Ercolani D.; Battiato S.; Sorba L.; Rossella F./titolo:Strong modulations of optical reflectance in tapered core-shell nanowires/doi:10.3390%2Fma12213572/rivista:Materials (Basel)/anno:2019/pagina_da:/pagina_a:/intervallo_pagine:/volume:12
- Accession number :
- edsair.doi.dedup.....ad43162d0dcccbac633f175bafe555df