منابع مشابه
Nanoscale optical electrometer.
We propose and demonstrate an all-optical approach to single-electron sensing using the optical transitions of a semiconductor quantum dot. The measured electric-field sensitivity of 5 (V/m)/√Hz corresponds to detecting a single electron located 5 μm from the quantum dot-nearly 10 times greater than the diffraction limited spot size of the excitation laser-in 1 s. The quantum-dot-based electrom...
متن کاملELECTROMETER Definition
An electrometer is an electrical instrument for measuring electric charge or electrical potential difference. There are many different types, ranging from historical hand-made mechanical instruments to high-precision electronic devices. Modern electrometers based on vacuum tube or solid state technology can be used to make voltage and charge measurements with very low leakage currents, down to ...
متن کاملOptical antennas as nanoscale resonators.
Recent progress in nanotechnology has enabled us to fabricate sub-wavelength architectures that function as antennas for improving the exchange of optical energy with nanoscale matter. We describe the main features of optical antennas for enhancing quantum emitters and review the designs that increase the spontaneous emission rate by orders of magnitude from the ultraviolet up to the near-infra...
متن کاملThe U-Tube Absolute Electrometer.
also a report on "Data Relating to X-Ray Spectra" by William Duane, published by the NArONAL RIZSxARCH CouNcm. ' Blake and Duane, Physic. Rev., Dec., 1917, p. 624. 4 See E. Wagner, Jahrbuch derRadioahctivit, 1919, also Physik. Zeit., Nov., 1920, p. 621; and C. Zecker, Ann. Physik. Leipsig, Sept., 1920, p. 28, also a note by D. L. Webster, presented to the American Physical Society at the same m...
متن کاملGabriel Lippmann and the Capillary Electrometer
Early workers in the field of potentiometry faced a serious problem. The type of cell commonly used in potentiometric studies could supply only a tiny current and often had a high internal electrical resistance. If the electromotive force (emf) of such a cell is to be measured accurately, the apparatus must draw essentially no current from the cell. One obvious approach is to oppose this emf wi...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2011
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.107.166802