title: Flexible optical manipulation of ring resonator by frequency detuning and double-port excitation.
abstract: Optical force exerted on a ring resonator, which can move freely in plane, is investigated using the finite-difference in time-domain method. In order to manipulate the ring resonator more flexibly, two assistant waveguides are introduced to form a microring resonator based add-drop device. Results show that a blue tuned source is more suitable for the manipulation of the ring, rather than the central resonant frequency as expected. A red-tuned frequency, however, is difficult to trap the ring stably. When the frequency detuning is combined with selected double-port excitation, the ring can be trapped stably at some discrete positions, some determined regions, or be transported continuously along the waveguide. This optically reconfigurable opto-mechanical resonant system may find potential applications in tunable photonic devices and precise sensing.
authors.forename: Yong
authors.initials: Y
authors.lastname: Geng
authors.forename: Tongtong
authors.initials: T
authors.lastname: Zhu
authors.forename: Haiyi
authors.initials: H
authors.lastname: Lv
authors.forename: Yongyin
authors.initials: Y
authors.lastname: Cao
authors.forename: Fangkui
authors.initials: F
authors.lastname: Sun
authors.forename: Weiqiang
authors.initials: W
authors.lastname: Ding