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The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
Published on: August 12, 2013
Generation of diffraction-free plasmonic beams with one-dimensional Bessel profiles
Cesar E Garcia-Ortiz1, Victor Coello, Zhanghua Han
1UANL, Facultad de Ciencias Físico-Matemáticas, San Nicolás de los Garza, Nuevo León, Mexico. cegarcia@cicese.mx
Optics Letters
|March 19, 2013
Summary
Researchers created diffraction-free plasmonic beams using special gold surfaces. These beams maintain their shape and can reconstruct themselves, showing key properties of Bessel beams.
Area of Science:
- Plasmonics
- Optics
- Nanotechnology
Background:
- Diffraction-free beams, like Bessel beams, resist spreading and can self-reconstruct.
- Plasmonic structures offer unique light manipulation capabilities at the nanoscale.
Purpose of the Study:
- To experimentally generate diffraction-free plasmonic beams.
- To demonstrate Bessel intensity profiles (zeroth- and first-order) using plasmonic structures.
Main Methods:
- Fabrication of axicon-like structures on gold film surfaces.
- Operation at a specific wavelength (700 nm).
- Experimental generation and characterization of plasmonic beams.
Main Results:
- Successful generation of diffraction-free plasmonic beams with Bessel profiles.
- Observed very low beam divergence (~8π mrad).
- Demonstrated self-reconstruction capability of the generated beams.
Conclusions:
- Axicon-like plasmonic structures can effectively generate diffraction-free beams.
- The generated beams exhibit key characteristics of Bessel beams, including low divergence and self-reconstruction.
