Solution processable and optically switchable 1D photonic structures
- Center for Nano Science and Technology@PoliMi, Milan (Italy). Istituto Italiano di Tecnologia
- Politecnico di Milano, Milano (Italy). Dipartimento di Chimica, Materiali e Ingegneria Chimica “Giulio Natta"
- Politecnico di Milano, Milano (Italy). Dipartimento di Fisica
- Istituto Italiano di Tecnologia (IIT), Genova (Italy). Dept. of Nanochemistry
We report the first demonstration of a solution processable, optically switchable 1D photonic crystal which incorporates phototunable doped metal oxide nanocrystals. The resulting device structure shows a dual optical response with the photonic bandgap covering the visible spectral range and the plasmon resonance of the doped metal oxide the near infrared. By means of a facile photodoping process, we tuned the plasmonic response and switched effectively the optical properties of the photonic crystal, translating the effect from the near infrared to the visible. The ultrafast bandgap pumping induces a signal change in the region of the photonic stopband, with recovery times of several picoseconds, providing a step toward the ultrafast optical switching. Optical modeling uncovers the importance of a complete modeling of the variations of the dielectric function of the photodoped material, including the high frequency region of the Drude response which is responsible for the strong switching in the visible after photodoping. Our device configuration offers unprecedented tunability due to flexibility in device design, covering a wavelength range from the visible to the near infrared. Our findings indicate a new protocol to modify the optical response of photonic devices by optical triggers only.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); European Union (EU)
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1494093
- Journal Information:
- Scientific Reports, Journal Name: Scientific Reports Journal Issue: 1 Vol. 8; ISSN 2045-2322
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
| Electrochromism in Electrolyte-Free and Solution Processed Bragg Stacks | text | January 2020 |
Wide Dynamic Range in Tunable Electrochromic Bragg Stacks from Doped Semiconductor Nanocrystals
|
journal | July 2019 |
All-Optical Transmission Modulation Due to Inelastic Interactions of Ultrashort Pulses in a Disordered Resonant Medium
|
journal | January 2019 |
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