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High nonlinear behavior of optical reflectivity in surface plasmon resonance structures which contain amorphous As2S3 thin films
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Paper Abstract

The amorphous films show many physical properties which differ from the crystalline state. One of these is the optical transparency photoinduced by light with photon energies higher than optical bandgap. The phenomenon is especially large in amorphous chalcogenide films. However, the changes of optical constants are too small for optoelectronic applications. In this paper we consider structure were the amorphous As2S3 film is placed in a structure which forms a surface plasmon resonance structure. The reflected light is coupled with waveguide modes. The experimental studies show that high nonlinear changes may be achieved for the light intensity of 10- 12 mW when the incident angle is close to resonance. For some film thicknesses the SPR resonance was achieved with prism made from BK7 glass, which is important opportunity for applications.

Paper Details

Date Published: 31 December 2018
PDF: 6 pages
Proc. SPIE 10977, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies IX, 1097708 (31 December 2018); doi: 10.1117/12.2323625
Show Author Affiliations
Aurelian A. Popescu, National Institute of Research and Development for Optoelectronics (Romania)
Dan Savastru, National Institute of Research and Development for Optoelectronics (Romania)
Mihai Stafe, Univ. Politehnica of Bucharest (Romania)
Niculae N. Puscas, Univ. Politehnica of Bucharest (Romania)


Published in SPIE Proceedings Vol. 10977:
Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies IX
Marian Vladescu; Razvan D. Tamas; Ionica Cristea, Editor(s)

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