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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