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Performing Spectroscopy on Plasmonic Nanoparticles with Transmission-Based Nomarski-Type Differential Interference Contrast Microscopy
Published on: June 5, 2019
Multispectral plasmon induced transparency in coupled meta-atoms.
Alp Artar1, Ahmet A Yanik, Hatice Altug
1Electrical and Computer Engineering Department, Boston University, Boston, Massachusetts 02215, United States.
Nano Letters
|March 29, 2011
Summary
We developed a scalable metamaterial that exhibits plasmon induced transparency across multiple wavelengths. This novel metamaterial enhances nonlinear optical processes, opening new avenues for optical information processing.
Area of Science:
- Optics and Photonics
- Materials Science
- Nanotechnology
Background:
- Plasmon induced transparency (PIT) is a phenomenon in metamaterials that mimics electromagnetically induced transparency.
- Achieving PIT in a scalable and multispectral manner remains a challenge for advanced optical applications.
- Coupled plasmonic modes in metamaterials offer a pathway to engineer novel spectral responses.
Purpose of the Study:
- To introduce a novel approach for constructing scalable metamaterial media supporting multispectral plasmon induced transparency.
- To investigate the underlying physics of hybridized plasmonic modes and their interaction.
- To demonstrate a practical fabrication method for creating such metamaterials.
Main Methods:
- Fabrication of composite multilayered metamaterial media with coupled meta-atoms.
- Experimental demonstration of hybridized plasmonic modes (radiant and subradiant) interacting via structural asymmetry.
- Development of a lift-off-free fabrication scheme for precise multi-layer registration.
- Application of a perturbative model to explain observed spectral features.
Main Results:
- Successful construction of a scalable metamaterial exhibiting multispectral plasmon induced transparency.
- Observation of novel spectral features attributed to hybridized plasmonic modes and mode coupling.
- Demonstration of a lift-off-free fabrication technique enabling accurate multi-layer assembly.
- Experimental validation of the proposed theoretical model.
Conclusions:
- The developed metamaterial approach enables scalable, multispectral plasmon induced transparency.
- The engineered metamaterial can simultaneously enhance nonlinear optical processes at multiple frequencies.
- This work paves the way for advanced optical information processing and other photonic applications.
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