Final published version
Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review
Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review
}
TY - GEN
T1 - Light structuring photonic hook via temperature mediated effects
AU - Peled, Maya Hen Shor
AU - Maioli, Paolo
AU - Karabchevsky, Alina
N1 - Publisher Copyright: © 2022 SPIE. All rights reserved.
PY - 2022/5/24
Y1 - 2022/5/24
N2 - Optical methods have been studied and used extensively for diagnostics and treatment of bio-tissues and cells. Yet, the quality of these methods is still biased by low optical contrast, background noise and heating. Therefore, the ability to track an object's location in cells and tissues is lacking. Here, we report on a method of optically moving gold nanoparticles in a temperature-mediated manner via a structured light - photonic hook. Since continuous wave (CW) generated photonic hooks are extremely weak in low-contrast media, we amplify the optical forces by using pulsed illumination. Our system consists of a micro-cylinder illuminated by an incident Gaussian pulse, and a mask controlling the asymmetry of the incident light. We show that the generated optical forces are around fifteen orders of magnitude larger than by illuminating with a continuous wave of equivalent average power. The photonic hook is applied to a gold nanoparticle embedded in liquid. By investigating the thermo-optical properties of metallic nanoparticles, we present the displacement of the gold nanoparticle, as a result of the momentum exchange. The displacement and changes in polarizability of the gold nanoparticle are examined.
AB - Optical methods have been studied and used extensively for diagnostics and treatment of bio-tissues and cells. Yet, the quality of these methods is still biased by low optical contrast, background noise and heating. Therefore, the ability to track an object's location in cells and tissues is lacking. Here, we report on a method of optically moving gold nanoparticles in a temperature-mediated manner via a structured light - photonic hook. Since continuous wave (CW) generated photonic hooks are extremely weak in low-contrast media, we amplify the optical forces by using pulsed illumination. Our system consists of a micro-cylinder illuminated by an incident Gaussian pulse, and a mask controlling the asymmetry of the incident light. We show that the generated optical forces are around fifteen orders of magnitude larger than by illuminating with a continuous wave of equivalent average power. The photonic hook is applied to a gold nanoparticle embedded in liquid. By investigating the thermo-optical properties of metallic nanoparticles, we present the displacement of the gold nanoparticle, as a result of the momentum exchange. The displacement and changes in polarizability of the gold nanoparticle are examined.
KW - nanojet
KW - nanophotonics
KW - optical forces
KW - photonic hook
KW - subwavelength focusing
U2 - 10.1117/12.2621703
DO - 10.1117/12.2621703
M3 - Conference contribution/Paper
AN - SCOPUS:85133636592
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Nanophotonics IX
A2 - Andrews, David L.
A2 - Bain, Angus J.
A2 - Nunzi, Jean-Michel
PB - SPIE
T2 - Nanophotonics IX 2022
Y2 - 9 May 2022 through 20 May 2022
ER -