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

Abstract

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. Here, 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.

Authors:
 [1];  [1];  [1];  [1];  [1];  [2];  [3];  [1];  [1];  [1]
  1. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  2. Iowa State Univ., Ames, IA (United States); Microelectronics Research Center, Ames, IA (United States)
  3. Microelectronics Research Center, Ames, IA (United States)
Publication Date:
Research Org.:
Ames Lab., Ames, IA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1494938
Report Number(s):
IS-J-9870
Journal ID: ISSN 2158-3226
Grant/Contract Number:  
AC02-07CH11358
Resource Type:
Accepted Manuscript
Journal Name:
AIP Advances
Additional Journal Information:
Journal Volume: 9; Journal Issue: 2; Journal ID: ISSN 2158-3226
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats

Park, Joong -Mok, Cheng, Di, Patz, Aaron, Luo, Liang, Liu, Zhaoyu, Fungura, Fadzai, Shinar, Ruth, Ho, Kai -Ming, Shinar, Joseph, and Wang, Jigang. Ultrafast nonlinear transparency driven at a telecom wavelength in an organic semiconductor system. United States: N. p., 2019. Web. doi:10.1063/1.5042542.
Park, Joong -Mok, Cheng, Di, Patz, Aaron, Luo, Liang, Liu, Zhaoyu, Fungura, Fadzai, Shinar, Ruth, Ho, Kai -Ming, Shinar, Joseph, & Wang, Jigang. Ultrafast nonlinear transparency driven at a telecom wavelength in an organic semiconductor system. United States. https://doi.org/10.1063/1.5042542
Park, Joong -Mok, Cheng, Di, Patz, Aaron, Luo, Liang, Liu, Zhaoyu, Fungura, Fadzai, Shinar, Ruth, Ho, Kai -Ming, Shinar, Joseph, and Wang, Jigang. Mon . "Ultrafast nonlinear transparency driven at a telecom wavelength in an organic semiconductor system". United States. https://doi.org/10.1063/1.5042542. https://www.osti.gov/servlets/purl/1494938.
@article{osti_1494938,
title = {Ultrafast nonlinear transparency driven at a telecom wavelength in an organic semiconductor system},
author = {Park, Joong -Mok and Cheng, Di and Patz, Aaron and Luo, Liang and Liu, Zhaoyu and Fungura, Fadzai and Shinar, Ruth and Ho, Kai -Ming and Shinar, Joseph and Wang, Jigang},
abstractNote = {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. Here, 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.},
doi = {10.1063/1.5042542},
journal = {AIP Advances},
number = 2,
volume = 9,
place = {United States},
year = {Mon Feb 11 00:00:00 EST 2019},
month = {Mon Feb 11 00:00:00 EST 2019}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 4 works
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Figures / Tables:

FIG. 1 FIG. 1: (a) The representative transient transmission dynamics of P3HT:PCBM blend. The photon energies of the pump and probe beams are 1.96 eV and 2.4 eV, respectively. Band alignment is illustrated as inset. Probe photon energy dependent ΔT/T of (b) P3HT:PCBM and (c) pristine P3HT. White-light continuum probe spectrum ismore » shown as inset of (c). Traces are intentionally offset for clarity.« less

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.