Particle trapping technologies provide the opportunity to study two-dimensional materials that are fully decoupled from substrates. We investigate the dynamics of a rotating micron-scale graphene particle that is levitated in high vacuum in a quadrupole ion trap and probed via optical scattering. The particle is spun to frequencies ranging from hundreds of kHz to above 50 MHz using a circularly polarized laser. We observe phase locking of particle rotation frequency to an applied RF electric field. The rotation frequency can be adjusted by changing the applied field frequency. We discuss prospects for measurements of particle properties enabled by this technique.
Joyce E. Coppock, Pavel Nagornykh, Jacob P. J. Murphy, and Bruce E. Kane, "Phase locking of the rotation of a graphene nanoplatelet to an RF electric field in a quadrupole ion trap," Proc. SPIE 9922, Optical Trapping and Optical Micromanipulation XIII, 99220E (Presented at SPIE Nanoscience + Engineering: August 28, 2016; Published: 16 September 2016); https://doi.org/10.1117/12.2238200.
Conference Presentations are recordings of oral presentations given at SPIE conferences and published as part of the conference proceedings. They include the speaker's narration along with a video recording of the presentation slides and animations. Many conference presentations also include full-text papers. Search and browse our growing collection of more than 12,000 conference presentations, including many plenary and keynote presentations.