Ultrafast nonlinear transparency driven at a telecom wavelength in an organic semiconductor system
Source abstract
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. 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.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Photonic and Optical Devices · Mechanical and Optical Resonators · Nonlinear Optical Materials Studies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Ames Laboratory - USDOE 1 , Ames, Iowa 50011, USA
Department of Physics and Astronomy, Iowa State University 2 , Ames, Iowa 50011, USA
Microelectronics Research Center 3 , Ames, Iowa 50011, USA
Funding
Department of Energy of USA
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