Related Experiment Video
Updated: Jun 1, 2026
08:58
Silicon Nanowires and Optical Stimulation for Investigations of Intra- and Intercellular Electrical Coupling
Published on: January 28, 2021
Nonlinear mixing in nanowire subwavelength waveguides
Carl J Barrelet1, Ho-Seok Ee, Soon-Hong Kwon
1Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States.
Nano Letters
|June 4, 2011
Summary
Researchers demonstrated nonlinear optical effects in tiny cadmium sulfide (CdS) nanowire waveguides. These subwavelength structures show promise for miniaturizing photonic circuits and enabling all-optical switching.
Area of Science:
- Photonics
- Nanotechnology
- Nonlinear Optics
Background:
- Achieving light-by-light control requires strong nonlinear optical responses in guided-wave geometries.
- Scaling down waveguides while preserving nonlinear effects is crucial for integrated photonic circuits.
Purpose of the Study:
- To investigate second-harmonic generation and optical parametric generation in subwavelength waveguides.
- To explore the potential of cadmium sulfide (CdS) nanowires for nonlinear photonic applications.
Main Methods:
- Fabrication of an 80 nm thick CdS nanowire subwavelength waveguide.
- Experimental observation of second-order nonlinear processes.
- Three-dimensional finite-difference time-domain (FDTD) simulations to analyze waveguide properties.
Main Results:
- Demonstrated second-harmonic generation and optical parametric generation in the CdS nanowire.
- Simulations confirmed enhanced coherence length due to the subwavelength geometry.
- Validated the potential for strong nonlinear interactions in nanoscale waveguides.
Conclusions:
- Nonlinear mixing in CdS nanowire subwavelength waveguides advances integrated photonics.
- These findings pave the way for miniaturized all-optical processing and switching.
- Subwavelength engineering offers a route to enhance nonlinear optical phenomena in photonic devices.
