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Related Concept Videos

Mass Analyzers: Common Types01:19

Mass Analyzers: Common Types

The quadrupole mass analyzer consists of four cylindrical metal rods arranged in a diamond carrying a DC voltage and a radio-frequency AC voltage. The motion of ions through the quadrupole depends on the field strength, causing only ions of a certain m/z to resonate successfully and strike the detector at a given field strength. Though the transmission rate for these analyzers is high, the exact elemental composition of the sample is not determined because of low resolution; however, they are...
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Atomic spectroscopy is a vital tool in elemental analysis, both qualitatively and quantitatively. It can be broadly divided into optical spectroscopy, mass spectroscopy, and X-ray spectroscopy methods. The optical spectroscopic methods are atomic absorption spectroscopy (AAS), atomic emission spectroscopy (AES), and atomic fluorescence spectroscopy (AFS). The first step in all three methods is atomization, where the solid, liquid, or solution-phase samples are converted into gas-phase atoms and...
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Electronic Structure of Atoms


An atom comprises protons and neutrons, which are contained inside the dense, central core called the nucleus, with electrons present around the nucleus. Taking into account the wave–particle duality of electrons and the uncertainty in position around the nucleus, quantum mechanics provides a more accurate model for the atomic structure. It describes atomic orbitals as the regions around the nucleus where electrons of discrete energy exist, characterized by four quantum numbers:  n, l, ml, and...

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Related Experiment Video

Updated: Jun 25, 2026

Optical Trapping of Nanoparticles
13:39

Optical Trapping of Nanoparticles

Published on: January 15, 2013

Electro-optical nanotraps for neutral atoms.

Brian Murphy1, Lene Vestergaard Hau

  • 1School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA.

Physical Review Letters
|March 5, 2009
PubMed
Summary
This summary is machine-generated.

We introduce novel nanoscale electro-optical traps for neutral atoms using charged carbon nanotubes and silver nanospheres. These traps efficiently load atoms at high velocities using laser light and plasmonics.

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Last Updated: Jun 25, 2026

Optical Trapping of Nanoparticles
13:39

Optical Trapping of Nanoparticles

Published on: January 15, 2013

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
11:45

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps

Published on: August 17, 2017

Trapping of Micro Particles in Nanoplasmonic Optical Lattice
07:20

Trapping of Micro Particles in Nanoplasmonic Optical Lattice

Published on: September 5, 2017

Area of Science:

  • Atomic, Molecular, and Optical Physics
  • Nanoscience and Nanotechnology
  • Quantum Optics

Background:

  • Neutral atom trapping is crucial for quantum technologies.
  • Existing methods often require complex setups and low atom velocities.
  • Developing efficient, high-loading-capacity traps is an ongoing challenge.

Purpose of the Study:

  • To propose and demonstrate a new class of nanoscale electro-optical traps for neutral atoms.
  • To utilize plasmonics for enhanced light-matter interactions in atom trapping.
  • To achieve direct trap loading of high-velocity atoms.

Main Methods:

  • Fabrication of a toroidal trap using a charged carbon nanotube decorated with a silver nanosphere dimer.
  • Employing a blue-detuned laser field to induce plasmonic effects.
  • Utilizing plasmon-enhanced repulsive potentials and viscous damping for atom capture.

Main Results:

  • Demonstrated a prototype nanoscale electro-optical trap.
  • Achieved strong light focusing and manipulation via induced plasmons.
  • Generated repulsive potential barriers and viscous damping forces.
  • Showcased direct trap loading of atoms with velocities up to several meters per second.

Conclusions:

  • The proposed nanoscale electro-optical traps offer a promising new platform for neutral atom manipulation.
  • Plasmonically enhanced light-matter interactions enable efficient loading of high-velocity atoms.
  • This technology has potential applications in quantum computing, sensing, and fundamental physics research.