Reflection from a free carrier front via an intraband indirect photonic transition

Enthalten in
Nature communications 
Volume
9
Issue
1
Start Page
art. no.1447
Citation
Nature communications 1 (9): 1447 (2018)
Publisher DOI
10.1038/s41467-018-03862-0
Publisher
Nature Publishing Group UK
Is Corrected By
10.15480/882.1769
The reflection of light from moving boundaries is of interest both fundamentally and for applications in frequency conversion, but typically requires high pump power. By using a dispersion-engineered silicon photonic crystal waveguide, we are able to achieve a propagating free carrier front with only a moderate on-chip peak power of 6 W in a 6 ps-long pump pulse. We employ an intraband indirect photonic transition of a co-propagating probe, whereby the probe practically escapes from the front in the forward direction. This forward reflection has up to 35% efficiency and it is accompanied by a strong frequency upshift, which significantly exceeds that expected from the refractive index change and which is a function of group velocity, waveguide dispersion and pump power. Pump, probe and shifted probe all are around 1.5 µm wavelength which opens new possibilities for "on-chip" frequency manipulation and all-optical switching in optical telecommunications.
Schlagworte
optical materials and structures
optics and photonics
slow light
DDC Class
500: Naturwissenschaften
530: Physik
620: Ingenieurwissenschaften
Thumbnail Image
Name

s41467-018-03862-0-1.pdf

Size

1.15 MB

Format

Adobe PDF

Version History

Now showing1 - 2 of 2
VersionDateSummary
3
2019-08-27 13:38:35
An Author Correction to this article was published on 20 August 2018. Thd PDF has been updated with a link to the correction.
1 *
 2018-06-08 13:24:04
* Selected version