Third-order nonlinear optical properties of fluoro-containing polyimides embedded with H-shaped chromophores

Mu Qin; Changshun Wang; Fuli Zhao; Pengfei Zeng; Peng Cai; Mingfeng Fang; Guoyuan Lu

doi:10.1117/1.OE.54.5.057101

4 May 2015 Third-order nonlinear optical properties of fluoro-containing polyimides embedded with H-shaped chromophores

Mu Qin, Changshun Wang, Fuli Zhao, Pengfei Zeng, Peng Cai, Mingfeng Fang, Guoyuan Lu

Author Affiliations +

Optical Engineering, Vol. 54, Issue 5, 057101 (May 2015). https://doi.org/10.1117/1.OE.54.5.057101

Abstract

The third-order nonlinear optical (NLO) properties of a series of fluoro-containing polyimides embedded with H-shaped chromophores including two donor-π-acceptor units were investigated by employing the single-beam Z-scan technique in the femtosecond regime. A strong nonlinear refraction index n₂ on the order of 10−¹⁷ m²/W was acquired for the serial polymers at 810 nm laser pulses. The value of n₂ was larger than that of the polymers with a corresponding mono donor-π-acceptor unit under the same laser excitation and negligible nonlinear absorption was observed in the two series of polymers at femtosecond pulse irradiation. The mechanism for the NLO response is discussed in terms of the molecular structure and dipole moment. We conclude that fluoro-containing polyimide polymers, with stronger electron-withdrawing substituents, embedded within H-shaped chromophores yield a noticeable improvement in the nonlinear refraction index. The figures of merit were evaluated for their potential applications in all-optical switching.

Citation Download Citation

Mu Qin, Changshun Wang, Fuli Zhao, Pengfei Zeng, Peng Cai, Mingfeng Fang, and Guoyuan Lu "Third-order nonlinear optical properties of fluoro-containing polyimides embedded with H-shaped chromophores," Optical Engineering 54(5), 057101 (4 May 2015). https://doi.org/10.1117/1.OE.54.5.057101

Published: 4 May 2015

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available