Trapping of micro and nano scale objects based on localized surface plasmon
AssigneeWashington University
InventorsLih-Yuan Lin, Xiaoyu Miao, Suzie Pun
Life of this patent
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Abstract
Methods for optically trapping and manipulating micro- and nano-sized particles by using light to induce localized surface plasmon resonance on metallic surface of a substrate. The method includes the steps of contacting a substrate with a medium having particles suspended therein; focusing a beam of coherent light onto the substrate such that the beam induces surface plasmon resonance; and trapping at least one of the suspended particles using a light induced dielectrophoresis force generated by the surface plasmon resonance.
Claims28
A method for manipulating a particle, comprising,
- (a) forming an array of metallic nanoparticles;
- (b) contacting the array of metallic nanoparticles with a fluid medium having particles suspended therein;
- (c) focusing a beam of coherent light onto the array of metallic nanoparticles such that the beam induces localized surface plasmon resonance;
- and
- (d) trapping at least one of the suspended particles using a light induced dielectrophoresis force generated by the localized surface plasmon resonance.
A method for manipulating a particle, comprising,
- (a) forming an array of metallic nanoparticles;
- (b) contacting the array of metallic nanoparticles with a fluid having particles suspended therein;
- (c) focusing a beam of polarized light onto the array of metallic nanoparticles such that the beam induces localized surface plasmon resonance;
- (d) trapping at least one of the suspended particles using a light induced dielectrophoresis force generated by the localized surface plasmon resonance;
- and
- (e) orienting the trapped particle by controlling the direction of polarization of the polarized light.
A method for manipulating a particle, comprising,
- (a) contacting a substrate with a fluid medium having particles suspended therein;
- (b) focusing a beam of coherent light onto the substrate such that the beam induces surface plasmon resonance;
- and
- (c) trapping at least one of the suspended particles using a light induced dielectrophoresis force generated by the surface plasmon resonance.
A method for manipulating a particle, comprising,
- (a) contacting a medium with a substrate, wherein a particle is suspended in the medium;
- (b) focusing a beam of polarized light onto the substrate, wherein the beam induces surface plasmon resonance, therefore, creates plasmon radiation field;
- and
- (c) orienting the particle by controlling the direction of polarization of the polarized light.
Dependencies are inferred from the claim text.