Enhanced Terahertz Radiation Generation of Photoconductive Antennas Based on Manganese Ferrite Nanoparticles

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2017_srep_lai_enhanced.pdf (1.14 MB)
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URI: http://hdl.handle.net/10347/19759
E-ISSN: 2045-2322
DOI: 10.1038/srep46261

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2017

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Springer Nature
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This paper presents a significant effect of manganese ferrite nanoparticles (MnFe2O4 NPs) on the increase of the surface photoconductivity of semiconductors. Herein, the optical characterization of photo-excited carriers of silicon coated with MnFe2O4 NPs was studied by using THz time-domain spectroscopy (THz-TDs). We observed that silicon coated with MnFe2O4 NPs provided a significantly enhanced attenuation of THz radiation in comparison with bare silicon substrates under laser irradiation. The experimental results were assessed in the context of a surface band structure model of semiconductors. In addition, photoconductive antennas coated with MnFe2O4 NPs significantly improved the efficiency of THz radiation generation and signal to noise ratio of the THz signal. This work demonstrates that coating with MnFe2O4 NPs could improve the overall performance of THz systems, and MnFe2O4 NPs could be further used for the implementation of novel optical devices

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Lai, W., Mazin Abdulmunem, O., del Pino, P., Pelaz, B., Parak, W., Zhang, Q., & Zhang, H. (2017). Enhanced Terahertz Radiation Generation of Photoconductive Antennas Based on Manganese Ferrite Nanoparticles. Scientific Reports, 7(1). doi: 10.1038/srep46261

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Q.Z. acknowledges a fellowship from the Chinese Scholarship Council. Part of the project was funded by the European Commission (grant Future NanoNeeds to WJP). Financial support from MINECO (MAT2015–74381-JIN to B.P., RYC-2014–16962 to P.dP.), the Consellería de Cultura, Educación e Ordenación Universitaria (Centro singular de investigación de Galicia accreditation 2016–2019, ED431G/09), and the European Regional Development Fund (ERDF) is gratefully acknowledged

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© The Author(s) 2017. This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
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