A single-atom 3D sub-attonewton force sensor

Abstract

We realize a 3D force sensor through super-resolution imaging of a single trapped ion and measured a 95-zN light force.

On-chip torsion balances with femtonewton force resolution at room temperature enabled by carbon nanotube and graphene

“…If an interferometer is adopted to detect the small displacement of the mirror, the force of a zeptonewton (10 −21 N) can be measured precisely at room temperature. The expected zeptonewton force resolution would break the record of hundreds of zeptonewtons obtained at ultralow temperature ( 33 , 34 ) and make an important breakthrough in the field of weak force measurement. As the torsion angle of the CNT is continuously adjustable by tuning light intensity, the influence on the electron transport properties and band structure produced by torsional strain can also be explored over a wider range ( 26 , 35 , 36 ) using the CNT torsion balance.…”

Laser stabilization to neutral Yb in a discharge with polarization-enhanced frequency modulation spectroscopy

“…47,48 This hyperfine splitting also provides a single F = 0 ground state, which is ideal for optical ion clocks used in metrology. 49 The simpler energy level structure in the even isotopes makes them useful for studying fundamental physics problems, such as observing the shadow of a single ion 50 or sensing sub-attonewton forces in three dimensions, 51 with minimal parameters and relaxes the requirements on needed equipment. This also makes them useful when setting up a new experiment for QIP applications.…”

Self-powered user-interactive electronic skin for programmable touch operation platform

“…Human-machine interaction (HMI) is implemented by three parts (human, machine, and interactive medium) whose task is to complete two processes (instructing the machine and giving feedback to humans) (1)(2)(3). Since most devices are controlled by electrical signals, the process of giving control commands to the machine generally relies on electrical readouts, such as using a keyboard and mouse to operate the computer (4)(5)(6)(7)(8)(9). On the basis of the fact that humans cannot directly obtain information in electrical signals, the process of giving feedback to human in HMI relies on the human-perceivable signals such as visible light, sound, and force (10)(11)(12)(13).…”