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Harmonic Nanoparticles for Regenerative Research
Published on: May 1, 2014
Enhanced second harmonic generation from InAs nano-wing structures on silicon.
Emanuele Francesco Pecora1, Gary F Walsh, Carlo Forestiere
1Department of Electrical and Computer Engineering & Photonics Center, Boston University, 8 Saint Mary Street, Boston, Massachusetts 02215, USA. dalnegro@bu.edu.
Nanoscale
|September 24, 2013
Summary
We observed morphology-dependent second-harmonic generation (SHG) in Indium Arsenide (InAs) nanomembranes. SHG efficiency correlated with nano-wing shape and size, showing up to 500x enhancement over bulk material.
Area of Science:
- Materials Science
- Optics
- Nanotechnology
Background:
- Second-harmonic generation (SHG) is a key nonlinear optical process.
- Nanomaterials offer unique optical properties due to their size and shape.
- Understanding morphology-dependent nonlinear optics is crucial for device applications.
Purpose of the Study:
- To investigate morphology-dependent second-harmonic generation (SHG) in Indium Arsenide (InAs) V-shaped nanomembranes.
- To correlate SHG efficiency with the specific shape and size of nanomembranes.
- To experimentally quantify SHG efficiency and compare it to bulk materials.
Main Methods:
- Fabrication of InAs V-shaped nanomembranes.
- Experimental measurement of SHG.
- Analysis of SHG dependence on nanomembrane morphology (shape and size).
- Theoretical calculations of local electromagnetic field spectra.
Main Results:
- Demonstrated morphology-dependent SHG from InAs V-shaped nanomembranes.
- Established a clear correlation between SHG and nano-wing shape/size.
- Experimentally quantified SHG efficiency, achieving up to 500x enhancement compared to bulk InAs.
- Validated experimental findings with rigorous electromagnetic field calculations.
Conclusions:
- The shape and size of InAs nanomembranes significantly influence SHG.
- InAs V-shaped nanomembranes exhibit significantly enhanced SHG, promising for nonlinear optical applications.
- Computational modeling supports the experimental observations of enhanced SHG.
