Strong Modulations of Optical Reflectance in Tapered Core-Shell Nanowires

被引：11

作者：

Floris, Francesco ^{[1
]}

Fornasari, Lucia ^{[2
,3
]}

Bellani, Vittorio ^{[2
,3
]}

Marini, Andrea ^{[4
]}

Banfi, Francesco ^{[5
]}

Marabelli, Franco ^{[2
,3
]}

Beltram, Fabio ^{[6
,7
]}

Ercolani, Daniele ^{[6
,7
]}

Battiato, Sergio ^{[6
,7
]}

Sorba, Lucia ^{[6
,7
]}

Rossella, Francesco ^{[6
,7
]}

机构：

[1] Univ Coll Cork, Tyndall Natl Inst, Cork T12 R5CP, Ireland

[2] Univ Pavia, Dipartimento Fis, I-27100 Pavia, Italy

[3] INFN, I-27100 Pavia, Italy

[4] Univ Aquila, Dept Phys & Chem Sci, I-67100 Laquila, Italy

[5] Univ Claude Bernard Lyon 1, Univ Lyon, CNRS, Femto Nano Opt Grp,Inst Lumiere Matiere, F-69622 Villeurbanne, France

[6] CNR, Scuola Normale Super, NEST, I-56127 Pisa, Italy

[7] CNR, Ist Nanosci, I-56127 Pisa, Italy

来源：

MATERIALS | 2019年 / 12卷 / 21期

关键词：

core-shell; nanowires; semiconductors; optical reflectance; numerical simulations; METAMATERIALS; SCATTERING; GROWTH; STATES;

D O I：

10.3390/ma12213572

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页数：11

共 38 条

[1] Cao LY, 2009, NAT MATER, V8, P643, DOI [10.1038/NMAT2477, 10.1038/nmat2477]
[2] Effective Wavelength Scaling of and Damping in Plasmonic Helical Antennae
Caridad, Jose M.
McCloskey, David
Rossella, Francesco
Bellani, Vittorio
Donegan, John F.
Krstic, Vojislav
[J]. ACS PHOTONICS, 2015, 2 (06): : 675 - 679
[3] Spatially Localized Enhancement of Evanescent Coupling to Whispering-Gallery Modes at 1550 nm Due to Surface Plasmon Resonances of Au Nanowires
Dale, Elijah B.
Ganta, Deepak
Yu, Deok-Jin
Flanders, Bret N.
Wicksted, James P.
Rosenberger, Albert T.
[J]. IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS, 2011, 17 (04) : 979 - 984
[4] Crystal Phases in Hybrid Metal-Semiconductor Nanowire Devices
David, J.
Rossella, F.
Rocci, M.
Ercolani, D.
Sorba, L.
Beltram, F.
Gemmi, M.
Roddaro, S.
[J]. NANO LETTERS, 2017, 17 (04) : 2336 - 2341
[5] Optical characterization of alignment and effective refractive index in carbon nanotube films
de los Arcos, T.
Oelhafen, P.
Mathys, D.
[J]. NANOTECHNOLOGY, 2007, 18 (26)
[6] Conductometric Sensing with Individual InAs Nanowires
Demontis, Valeria
Rocci, Mirko
Donarelli, Maurizio
Maiti, Rishi
Zannier, Valentina
Beltram, Fabio
Sorba, Lucia
Roddaro, Stefano
Rossella, Francesco
Baratto, Camilla
[J]. SENSORS, 2019, 19 (13)
[7] Electromagnetic wave propagation in dense carbon nanotube arrays
Dragoman, D
Dragoman, M
[J]. JOURNAL OF APPLIED PHYSICS, 2006, 99 (07)
[8] Self-Assembled InAs Nanowires as Optical Reflectors
Floris, Francesco
Fornasari, Lucia
Marini, Andrea
Bellani, Vittorio
Banfi, Francesco
Roddaro, Stefano
Ercolani, Daniele
Rocci, Mirko
Beltram, Fabio
Cecchini, Marco
Sorba, Lucia
Rossella, Francesco
[J]. NANOMATERIALS, 2017, 7 (11):
[9] Light Trapping in Silicon Nanowire Solar Cells
Garnett, Erik
Yang, Peidong
[J]. NANO LETTERS, 2010, 10 (03) : 1082 - 1087
[10] Ultrafast Laser Pulses to Detect and Generate Fast Thermomechanical Transients in Matter
Giannetti, Claudio
Banfi, Francesco
Nardi, Damiano
Ferrini, Gabriele
Parmigiani, Fulvio
[J]. IEEE PHOTONICS JOURNAL, 2009, 1 (01): : 21 - 32

← 1 2 3 4 →