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Safari E, Salmani Shik S, Majles Ara M H, Zakerhamidi M S. Investigation of the Optical Bistability in the MNA polymeric thin films. ICOP & ICPET _ INPC _ ICOFS 2014; 20 :1637-1640
URL: http://opsi.ir/article-1-47-en.html
URL: http://opsi.ir/article-1-47-en.html
Ebrahim Safari *1 
, Somayeh Salmani Shik1 , Mohammad Hossein Majles Ara2 , Mohammad Sadegh Zakerhamidi1
, Somayeh Salmani Shik1 , Mohammad Hossein Majles Ara2 , Mohammad Sadegh Zakerhamidi1
1- University of Tabriz
2- Kharazmi University
2- Kharazmi University
Abstract: (7732 Views)
In this paper, the Optical Bistability (OB) of 2-Methyl-4-Nitroaniline (MNA) doped with PMMA polymer thin films on Mach-Zehnder interferometer with applied external feedback are investigated in five thicknesses. The measurements were performed at 532 nm using a NdYAG CW laser with irradiation of 300 mW. A hysteresis loop due to optical bistability obtained because of charge transfer in benzene ring. It is demonstrated that the gain of optical bistability improved with using external feedback for thinner samples. But in higher thicknesses, the local thermal effect decrease the gain and has negative effect on OB.
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