Management of light and scattering in InP NWs by dielectric polymer shell

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2020-09-18
Major/Subject
Mcode
Degree programme
Language
en
Pages
Series
Nanotechnology
Abstract
Understanding and management of light is of great importance for nanoscale devices. This report demonstrates enhanced absorption, photoluminescence and scattering in InP nanowires when coated with dielectric polymer shell. The shells increase absorption and emission by a factor of ~2 and photoluminescence by a factor of ~4. A thorough optical characterization is provided, including reflectance, transmission, luminescence and scattering to incident and transmitted directions. From this characterization, we derive the distribution of absorbed light within the structure (InP nanowires, Au seed particles and the substrate). Additionally, reflectance, transmission and emission are shown to become increasingly diffuse with the dielectric shells. The results are thought to provide better understanding in light-matter interaction in nanostructures, as well as to provide valuable tools for light and scattering management in nanoscale optoelectronics.
Description
Keywords
absorptance, dielectric shell, diffuse, emission, light distribution, light trapping, nanowire, NW, photoluminescence, scattering, specular, transmittance
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Citation
Haggren , T , Anttu , N , Mäntynen , H , Tossi , C , Kim , M , Khayrudinov , V & Lipsanen , H 2020 , ' Management of light and scattering in InP NWs by dielectric polymer shell ' , Nanotechnology , vol. 31 , no. 38 , 384003 . https://doi.org/10.1088/1361-6528/ab9aec