Work

Three-dimensional bubble channel based on a photothermal field by a multiphoton process

Year: 2024

Type: article

Abstract: New techniques for accurately controlling microbubble positioning, leveraging the three-dimensional and high spatial resolution of two-photon absorption, have been experimentally demonstrated. Femtosecond laser pulses focused on a solution created a sharp thermal gradient at the focal point, where Marangoni forces acting on the trapped bubbles exceeded 380 pN, considerably stronger than those generated by thermal diffusion. This effect was used to position bubbles with micrometer accuracy along a narrow two-photon absorption distribution with a length of 1 mm. The novel bubble and flow driving principles, combined with fast and precise energy distribution control techniques in optics, provide innovative proposals for microfluidics, soft robotics, and many other fields.

Source: Japanese Journal of Applied Physics

DOI: 10.35848/1347-4065/ad8825

Authors: Hironori Ito, Yuki Uchiyama, Sosuke Omata, Hiroto Yamada, Hao-Keng Wei, Satoshi Honma

Institutions: University of Yamanashi, National Yang Ming Chiao Tung University

Language: English

Topic: Orbital Angular Momentum in Optics

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: Japan Society for the Promotion of Science

Awards: Improving the efficiency of light to kinetic energy conversion by pulse shaping of laser pulses that generate bubbles., Observation of pure spin current using polarization and phase control of terahertz waves, G7392840855