Featured
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Letter |
Beating the shot-noise limit
Current shot-noise for a relativistic electron beam—proportional to the average current and frequency bandwidth of the beam—can be suppressed below the shot-noise limit at optical frequencies, through the exploitation of collective Coulomb interactions.
- Avraham Gover
- , Ariel Nause
- & Mikhail Fedurin
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News & Views |
Topological transistor
Devices based on surface electrons in topological insulators are keenly anticipated, but singling these electrons out amid abundant bulk electrons poses a formidable challenge. Inspiration from the common transistor now enables manipulation of these exotic states.
- L. Andrew Wray
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Letter |
Phonon-cavity electromechanics
Conventional approaches to optomechanics control and monitor the motion of nanoscale mechanical resonators by coupling it to a high-quality photonic cavity. An all-mechanical implementation is now demonstrated by creating a so-called phonon cavity from different oscillating modes of the resonator. This idea opens a route to using solid-state systems to investigate physics not accessible in their analogous, but better developed, quantum-optics counterpart.
- I. Mahboob
- , K. Nishiguchi
- & H. Yamaguchi
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News & Views |
The stress of light cools vibration
Brillouin scattering of light is now shown to attenuate the Brownian motion of microscopic acoustic resonators. This electrostrictive phenomenon could be a useful complement to the ponderomotive and photothermal effects that can optically control optomechanical systems.
- Ivan Favero
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Letter |
Observation of spontaneous Brillouin cooling
A novel mechanism for cooling tiny mechanical resonators is now demonstrated. Inelastic scattering of light from phonons in an electrostrictive material attenuates the Brownian motion of the mechanical mode.
- Gaurav Bahl
- , Matthew Tomes
- & Tal Carmon
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Article |
Optical cavity cooling of mechanical modes of a semiconductor nanomembrane
A novel mechanism for cooling nanomechanical objects has now been demonstrated. Optically excited electron–hole pairs produce a mechanical stress that damps the motion of a gallium arsenide membrane. In this way, the nanoscale resonator is cooled from room temperature to 4 K.
- K. Usami
- , A. Naesby
- & E. S. Polzik
A wide-bandgap metal–semiconductor–metal nanostructure made entirely from graphene
Light from ripples
Between the sheets
Dense bytes from antiferromagnetic bits