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

[11] Influence of wetting state on optical reflectance spectra of Si nanopillar arrays[J]. Gwon, Minji;Kim, Sujung;Li, Jiaqi;Xu, Xiumei;Kim, Sun-Kyung;Lee, Eunsongyi;Kim, Dong-Wook;Chen, Chang. JOURNAL OF APPLIED PHYSICS, 2015(21)
[12] Gate-Tunable Conducting Oxide Metasurfaces[J]. Huang, Yao-Wei;Lee, Ho Wai Howard;Sokhoyan, Ruzan;Pala, Ragip A.;Thyagarajan, Krishnan;Han, Seunghoon;Tsai, Din Ping;Atwater, Harry A. NANO LETTERS, 2016(09)
[13] Engineering photonic density of states using metamaterials[J]. Jacob, Z.;Kim, J. -Y.;Naik, G. V.;Boltasseva, A.;Narimanov, E. E.;Shalaev, V. M. APPLIED PHYSICS B-LASERS AND OPTICS, 2010(01)
[14] Generating optical orbital angular momentum at visible wavelengths using a plasmonic metasurface[J]. Karimi, Ebrahim;Schulz, Sebastian A.;De Leon, Israel;Qassim, Hammam;Upham, Jeremy;Boyd, Robert W. LIGHT-SCIENCE & APPLICATIONS, 2014
[15] Kauranen M, 2012, NAT PHOTONICS, V6, P737, DOI [10.1038/nphoton.2012.244, 10.1038/NPHOTON.2012.244]
[16] Applications, techniques, and microfluidic interfacing for nanoscale biosensing[J]. Kim, Jungkyu;Junkin, Michael;Kim, Deok-Ho;Kwon, Seunglee;Shin, Young Shik;Wong, Pak Kin;Gale, Bruce K. MICROFLUIDICS AND NANOFLUIDICS, 2009(02)
[17] Topological Transitions in Metamaterials[J]. Krishnamoorthy, Harish N. S.;Jacob, Zubin;Narimanov, Evgenii;Kretzschmar, Ilona;Menon, Vinod M. SCIENCE, 2012(6078)
[18] Lemoult F, 2013, NAT PHYS, V9, P55, DOI [10.1038/nphys2480, 10.1038/NPHYS2480]
[19] Tailored optical polarization in nanostructured metamaterials[J]. Mendoza, Bernardo S.;Luis Mochan, W. PHYSICAL REVIEW B, 2016(19)
[20] Giant optical birefringence in ensembles of semiconductor nanowires[J]. Muskens, O. L.;Borgstrom, M. T.;Bakkers, E. P. A. M.;Rivas, J. Gomez. APPLIED PHYSICS LETTERS, 2006(23)

← 1 2 3 4 →