Open AccessNear-infrared lateral photovoltaic effect of β-FeSi2 films on SrTiO3 substrate
Author(s) -
Juan Wang,
Ruohanyang Leng,
Shangkun Chang,
Dailin Li,
Hao Ni
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.016521
Subject(s) - materials science , substrate (aquarium) , thin film , optoelectronics , silicon , optics , infrared , laser , pulsed laser deposition , photovoltaic system , nanotechnology , oceanography , physics , geology , ecology , biology
β-FeSi 2 is of interest for Si-based optoelectronic applications in the past decades. We fabricated β-FeSi 2 thin films on the SrTiO 3 single crystal by KrF-pulsed laser deposition to open a new view of integrating β-FeSi 2 with non-silicon functional materials. After investigating the lateral photovoltaic effect of β-FeSi 2 /SrTiO 3 under the illumination of the 808 nm and 1064 nm steady lasers, we found that the position detection sensitivity can reach 2.68 mVmW -1 mm -1 and 2.24 mVmW -1 mm -1 , respectively. The low degree of nonlinearities of position-sensitive and power-sensitive characteristics provide a promising application of SrTiO 3 -based β-FeSi 2 thin films on position-sensitive detection devices.