Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Measurement of mass by optical forced oscillation of absorbing particles trapped in air

Not Accessible

Your library or personal account may give you access

Abstract

We demonstrate the application of optical forced oscillation to measure the mass of an absorbing microparticle trapped in air. When the light intensity is modulated sinusoidally, the particle in the trap undergoes forced oscillation, and the amplitude of the oscillation depends directly on the modulation frequency. We obtain the stiffness of the optical trap and the mass of the trapped particle by fitting the experimental data of the amplitudes versus the modulation frequencies with a simple spring model. The fitting results show that, for a certain particle, the stiffness varies linearly with the trapping light intensity while the mass is constant. The density of the microparticle is also estimated, which has potential to classify different kinds of absorbing particles, such as C and CuO.

© 2017 Optical Society of America

Full Article  |  PDF Article
More Like This
Photophoretic trapping of absorbing particles in air and measurement of their single-particle Raman spectra

Yong-Le Pan, Steven C. Hill, and Mark Coleman
Opt. Express 20(5) 5325-5334 (2012)

Oscillations of absorbing particles at the water-air interface induced by laser tweezers

Min-Cheng Zhong, Zi-Qiang Wang, and Yin-Mei Li
Opt. Express 25(3) 2481-2488 (2017)

Opto-thermal oscillation and trapping of light absorbing particles

Min-Cheng Zhong, Ai-Yin Liu, and Feng Ji
Opt. Express 27(21) 29730-29737 (2019)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (5)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved