Ultrafast nonlinear transparency driven at a telecom wavelength in an organic semiconductor system

Ultrafast nonlinear transparency driven at a telecom wavelength in an organic semiconductor system

Ultrafast laser-induced transparency is demonstrated using femtosecond (fs) pump-probe experiments in the organic P3HT:PCBM (donor:acceptor) blend structure. For above band gap pumping, ultrafast transient signals strongly depend on the probe photon energy. Most intriguingly, for below band gap pump...

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Main Authors: Joong-Mok Park, Di Cheng, Aaron Patz, Liang Luo, Zhaoyu Liu, Fadzai Fungura, Ruth Shinar, Kai-Ming Ho, Joseph Shinar, Jigang Wang
Format: Article
Language:English
Published: AIP Publishing LLC 2019-02-01
Series:AIP Advances
Online Access:http://dx.doi.org/10.1063/1.5042542
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spelling doaj-c91f30224b4a47eb9380e37ae222ceb82020-11-24T21:51:13ZengAIP Publishing LLCAIP Advances2158-32262019-02-0192025303025303-510.1063/1.5042542019902ADVUltrafast nonlinear transparency driven at a telecom wavelength in an organic semiconductor systemJoong-Mok Park0Di Cheng1Aaron Patz2Liang Luo3Zhaoyu Liu4Fadzai Fungura5Ruth Shinar6Kai-Ming Ho7Joseph Shinar8Jigang Wang9Ames Laboratory - USDOE, Ames, Iowa 50011, USAAmes Laboratory - USDOE, Ames, Iowa 50011, USAAmes Laboratory - USDOE, Ames, Iowa 50011, USAAmes Laboratory - USDOE, Ames, Iowa 50011, USAAmes Laboratory - USDOE, Ames, Iowa 50011, USADepartment of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USAMicroelectronics Research Center, Ames, Iowa 50011, USAAmes Laboratory - USDOE, Ames, Iowa 50011, USAAmes Laboratory - USDOE, Ames, Iowa 50011, USAAmes Laboratory - USDOE, Ames, Iowa 50011, USAUltrafast laser-induced transparency is demonstrated using femtosecond (fs) pump-probe experiments in the organic P3HT:PCBM (donor:acceptor) blend structure. For above band gap pumping, ultrafast transient signals strongly depend on the probe photon energy. Most intriguingly, for below band gap pumping at 0.95 eV, or 1.3 µm at a telecom wavelength, a huge transmission increase up to 30% only during the laser pulse ∼100 fs is observed as a pump-driven, quasi-instantaneous suppression of absorption for the high photon-energy energy probe beam. We attribute the observed laser-driven transparency to dynamic Franz-Keldysh effect, at least one order of magnitude stronger compared to the multiphoton nonlinearities. Our results may be used for development of low-cost, beyond 100 Gbit/s optical switching devices.http://dx.doi.org/10.1063/1.5042542
collection DOAJ
language English
format Article
sources DOAJ
author Joong-Mok Park
Di Cheng
Aaron Patz
Liang Luo
Zhaoyu Liu
Fadzai Fungura
Ruth Shinar
Kai-Ming Ho
Joseph Shinar
Jigang Wang
spellingShingle Joong-Mok Park
Di Cheng
Aaron Patz
Liang Luo
Zhaoyu Liu
Fadzai Fungura
Ruth Shinar
Kai-Ming Ho
Joseph Shinar
Jigang Wang
Ultrafast nonlinear transparency driven at a telecom wavelength in an organic semiconductor system
AIP Advances
author_facet Joong-Mok Park
Di Cheng
Aaron Patz
Liang Luo
Zhaoyu Liu
Fadzai Fungura
Ruth Shinar
Kai-Ming Ho
Joseph Shinar
Jigang Wang
author_sort Joong-Mok Park
title Ultrafast nonlinear transparency driven at a telecom wavelength in an organic semiconductor system
title_short Ultrafast nonlinear transparency driven at a telecom wavelength in an organic semiconductor system
title_full Ultrafast nonlinear transparency driven at a telecom wavelength in an organic semiconductor system
title_fullStr Ultrafast nonlinear transparency driven at a telecom wavelength in an organic semiconductor system
title_full_unstemmed Ultrafast nonlinear transparency driven at a telecom wavelength in an organic semiconductor system
title_sort ultrafast nonlinear transparency driven at a telecom wavelength in an organic semiconductor system
publisher AIP Publishing LLC
series AIP Advances
issn 2158-3226
publishDate 2019-02-01
description Ultrafast laser-induced transparency is demonstrated using femtosecond (fs) pump-probe experiments in the organic P3HT:PCBM (donor:acceptor) blend structure. For above band gap pumping, ultrafast transient signals strongly depend on the probe photon energy. Most intriguingly, for below band gap pumping at 0.95 eV, or 1.3 µm at a telecom wavelength, a huge transmission increase up to 30% only during the laser pulse ∼100 fs is observed as a pump-driven, quasi-instantaneous suppression of absorption for the high photon-energy energy probe beam. We attribute the observed laser-driven transparency to dynamic Franz-Keldysh effect, at least one order of magnitude stronger compared to the multiphoton nonlinearities. Our results may be used for development of low-cost, beyond 100 Gbit/s optical switching devices.
url http://dx.doi.org/10.1063/1.5042542
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