Optical bistability of azo dye-doped PMMA polymer

被引：12
|
作者：
Salmani, S. [1 ]
Safari, E. [1 ]
Ara, M. H. Majles [2 ]
Zakerhamidi, M. S. [3 ]
机构：
[1] Univ Tabriz, Dept Phys, Tabriz, Iran
[2] Kharazmi Univ, Dept Phys, Photon Lab, Tehran, Iran
[3] Univ Tabriz, Res Inst Appl Phys & Astron, Tabriz, Iran
来源：
OPTICAL MATERIALS | 2013年 / 35卷 / 09期
关键词：
Optical bistability; Thin film; Mach-Zehnder; External feedback;
D O I：
10.1016/j.optmat.2013.04.002
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this paper, the optical bistability (OB) in three DR1-doped PMMA polymer samples with different thicknesses is experimentally investigated. The measurements are performed in the presence and absence of external feedback in a Mach-Zehnder interferometer nonlinear-ring-cavity. A CW Nd:YAG laser (lambda = 532 nm) with 300 mW power is used to interact with the thin polymer films. The results show a hysteresis loop due to optical bistability, indicating that increase of feedback (by 20%) results in OB-index increase. So, increasing the external feedback improved the OB-gain. Cis-Trans isomerization and local thermal effect are responsible for OB-hysteresis loop observation. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：1619 / 1622
页数：4
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