title: Enhanced Terahertz Radiation Generation of Photoconductive Antennas Based on Manganese Ferrite Nanoparticles.
abstract: This paper presents a significant effect of manganese ferrite nanoparticles (MnFe2O4NPs) on the increase of the surface photoconductivity of semiconductors. Herein, the optical characterization of photo-excited carriers of silicon coated with MnFe2O4NPs was studied by using THz time-domain spectroscopy (THz-TDs). We observed that silicon coated with MnFe2O4NPs 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 MnFe2O4NPs significantly improved the efficiency of THz radiation generation and signal to noise ratio of the THz signal. This work demonstrates that coating with MnFe2O4NPs could improve the overall performance of THz systems, and MnFe2O4NPs could be further used for the implementation of novel optical devices.
authors.affiliation: Academy of Photoelectric Technology, HeFei University of Technology, HeFei, 230009, China.|Faculty of Physics, Philipps-Universität Marburg, Renthof 7, Marburg, 35032, Germany.
authors.forename: Weien
authors.initials: W
authors.lastname: Lai
authors.affiliation: Faculty of Physics, Philipps-Universität Marburg, Renthof 7, Marburg, 35032, Germany.
authors.forename: Oday
authors.initials: O
authors.lastname: Mazin Abdulmunem
authors.affiliation: Centro Singular de Investigación en Química Biológica e Materiales Moleculares (CiQUS), and Departamento de Física de Partículas, Universidade de Santiago de Compostela, Santiago de Compostela, 15782, Spain.
authors.forename: Pablo
authors.initials: P
authors.lastname: Del Pino
authors.affiliation: Centro Singular de Investigación en Química Biológica e Materiales Moleculares (CiQUS), and Departamento de Física de Partículas, Universidade de Santiago de Compostela, Santiago de Compostela, 15782, Spain.
authors.forename: Beatriz
authors.initials: B
authors.lastname: Pelaz
authors.affiliation: Faculty of Physics, Philipps-Universität Marburg, Renthof 7, Marburg, 35032, Germany.|Institute of Nano Biomedicine and Engineering, Key Laboratory for Thin Film and Microfabrication Technology of the Ministry of Education, Department of Instrument Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, 800 Dongchuan RD, Shanghai, 200240, China.
authors.forename: Wolfgang J
authors.initials: WJ
authors.lastname: Parak
authors.affiliation: Faculty of Physics, Philipps-Universität Marburg, Renthof 7, Marburg, 35032, Germany.|Institute of Nano Biomedicine and Engineering, Key Laboratory for Thin Film and Microfabrication Technology of the Ministry of Education, Department of Instrument Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, 800 Dongchuan RD, Shanghai, 200240, China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Electronic Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, China.
authors.forename: Huaiwu
authors.initials: H
authors.lastname: Zhang