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Related Experiment Video

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$Femtosecond Laser Filaments for Use in Sub-Diffraction-Limited Imaging and Remote Sensing$

Femtosecond Laser Filaments for Use in Sub-Diffraction-Limited Imaging and Remote Sensing

Published on: April 25, 2019

Focusing light in a curved-space.

Danilo H Spadoti¹, Lucas H Gabrielli, Carl B Poitras

¹Department of Electrical and Computer Engineering, Cornell University, Ithaca, NY 14853, USA.

|February 23, 2010

Summary

We demonstrate novel 2D silicon nanolenses using transformation optics. These nanolenses achieve a wavelength-independent focal point, focusing light across a broad spectral range for advanced optical applications.

Area of Science:

Photonics and Nanotechnology
Optical Engineering

Background:

Traditional lenses face limitations with chromatic aberration, affecting performance across different wavelengths.
Nanolenses offer potential for miniaturization and enhanced optical functionalities.

Purpose of the Study:

To demonstrate 2D silicon nanolenses with a wavelength-independent focal point using transformation optics.
To explore the design and fabrication of these nanolenses for broadband light focusing.

Main Methods:

Utilized transformation optics principles for nanolens design.
Fabricated silicon nanolenses with dimensions from 5.0 µm x 5.0 µm to 20 µm x 20 µm.
Conducted numerical simulations and experimental validation of optical performance.

Main Results:

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Nanolenses exhibit a wavelength-independent focal point.
Simulations predict broadband focusing from 1.30 µm to 1.60 µm.
Experimental results confirm focusing from 1.52 µm to 1.61 µm.

Conclusions:

Transformation optics enables the creation of effective 2D silicon nanolenses with broadband focusing capabilities.
These nanolenses represent a significant advancement for integrated photonic devices and optical systems.