Fabrication and Active Control of Plasmonic Metamaterials Using Ultrafast Laser
Date Issued
2014
Date
2014
Author(s)
Tseng, Ming-Lun
Abstract
Plasmonic metamaterials as a novel class of artificially engineered nanostructures exhibit unconventional optical responses and applications, such as negative refraction, super-resolution imaging, photonic nanolasers, chiral optics components, and biosensors. In this thesis an ultrafast laser is utilized in two applications - fabrication and active control of multilayered plasmonic metamaterials. Contact-mode laser induced forward transfer technique is employed to fabricate arrays of multilayered split ring resonators in which the layered structures are composed of gold/dielectric/gold thin films. Optical measurement reveals rich resonance properties and coupling between split ring resonators of the fabricated metamaterials.
The active control of the plasmonic metamaterials by ultrafast laser utilizes two counter-propagating ultrafast laser pulses that form local electric and magnetic field maxima in nearby free space. Under excitation of a particular condition, a certain group of multipolar resonances from the metamaterial are amplified while others are suppressed at the maximum of electric or magnetic field. Using this technique, we were able to reveal the hidden resonance modes of metamaterials which allowed us to gain understanding of these features that are otherwise difficult to study. This technique opens an important pathway for developing novel plasmonic metamaterials and exploring their associated properties.
Subjects
超穎物質
奈米電漿子學
侷域性表面電漿
奈米光學
三維結構
超快雷射製程
超快雷射光譜術
Type
thesis
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