2023年8月7日，Wiley旗下top期刊《Advanced Materials》在线发表了云南师范大学物理与电子信息学院LIU Taili与香港城市大学曾世荣（Sai Wing TSANG）教授、罗敬东教授、任广禹（Alex K-Y. Jen）教授合作发表的最新研究成果《Push-pull heptamethines near the cyanine limit exhibiting large quadratic electro-optic effect》。Weilong Chen为第一作者，刘泰立（LIU Taili)博士为共同第一作者，现为云南师范大学物理与电子信息学院教师。通讯作者为香港城市大学Sai Wing TSANG教授、罗敬东教授、Alex K-Y. Jen教授。

全文链接：https://onlinelibrary.wiley.com/doi/10.1002/adma.202306089

Advanced Materials - 2023 - Chen.pdf

Abstract:Harnessing  the  quadratic  electro-optic  (QEO)  of  near-infrared  polymethine  chromophores over  broad  telecom  wavelength  bands  is  a  subject  of  immense  potential  but  remains  largely  under-investigated. Herein we report a series of push-pull heptamethines containing the tricyanofuran (TCF) acceptors  and  indoline  or  benzo[e]indoline  donors.  These  dipolar  chromophores  can  attain  a  highly delocalized “cyanine-like” electronic ground state in solvents spanning a wide range of polarities, in some   cases  even   closer   to   the   ideal   polymethine   state   than   symmetrical   cyanines.   We   use   a transmission-mode  electromodulation  spectroscopy  to  study  the  electric-field-induced  changes  in optical absorption and refraction of polymer films doped with heptamethine chromophores, and obtain large   and   thermally   stable   QEO   effect   with   high   efficiency-loss   figure-of-merits   that   compare favorably to those from dipolar polyenes in poled or unpoled polymers and III-V semiconductors. Our study  opens  a  path  for  developing  organic  materials  based  on  cyanine-like  merocyanines  for  CMOS-compatible, fast, efficient, and low-loss electro-optic modulation.

据悉，刘泰立（Taili LIU）博士2018年毕业于香港城市大学，导师为：Sai Wing TSANG教授，

博士题目为：Excitonic Effect in Organic Semiconductors Studied by Electromodulation Spectroscopy

代表成果：

Weilong Chen, Taili Liu, Jie Zou, Di Zhang, Man Kit Tse, Sai-Wing Tsang, Jingdong Luo, Alex K-Y. Jen.Push-pull Heptamethines Near The Cyanine Limit Exhibiting Large Quadratic Electro-Optic Effect

Advanced Materials，First published: 07 August 2023

Liu, TL; Zhang, D; (...); Luo, JD，Record-high near-band-edge optical nonlinearities and two-level model correction of poled polymers by spectroscopic electromodulation and ellipsometry

SCIENCE CHINA-CHEMISTRY2022， 65 (3) , pp.584-593.

Liu, TL; Foo, Y; (...); Tsang, SW.A generalized Stark effect electromodulation model for extracting excitonic properties in organic semiconductors.NATURE COMMUNICATIONS,2019,10.

扩展阅读：

https://scholars.cityu.edu.hk/en/persons/taili-liu(dc4c0e30-63eb-4bc9-8b6c-3dfdeb9c5cf9)/publications.html?remoteOrigin=false&page=0

https://scholars.cityu.edu.hk/en/theses/theses(cd7916b6-b566-45ae-9ebe-8a1de0e730cc).html