Open AccessInvestigation of the Possibility to Use Ge p-i-n Photodiodes in Infrared SPR Sensors
Author(s) -
Artem Fedorenko,
Glib Dorozinsky,
Hanna Dorozinska,
Natalia Kachur,
В. П. Маслов
Publication year - 2021
Publication title -
european journal of applied physics
Language(s) - English
Resource type - Journals
ISSN - 2684-4451
DOI - 10.24018/ejphysics.2021.3.4.95
Subject(s) - photodiode , surface plasmon resonance , infrared , refractometer , materials science , optoelectronics , wavelength , surface plasmon , sensitivity (control systems) , optics , dynamic range , plasmon , refractive index , nanotechnology , physics , engineering , electronic engineering , nanoparticle
Considered in this work are the possibility and advantages of applying a Ge photodiode to measure the surface plasmon resonance (SPR) in the near infrared range (IR). The investigations were performed using the prototype of IR SPR refractometer that operates with two fixed wavelengths (1310 and 1552 nm) for excitation of surface plasmons in a thin gold film in the Kretschmann optical scheme. The obtained results of experiments enabled us to draw the conclusion that application of the Ge photodiode in the SPR sensor at the wavelength 1.5 µm allows increasing the sensitivity and response magnitude as well as widening the dynamic range of this sensor device.