Related Experiment Video
Updated: Jul 12, 2026
11:45
Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
Published on: August 17, 2017
Laser spectroscopy of trapped atomic ions
Science (New York, N.Y.)
|August 7, 1987
Summary
Laser spectroscopy using trapped atomic ions achieves ultra-high resolution. Techniques like laser cooling and single-ion isolation minimize perturbations, enabling precise measurements for advanced atomic clocks and fundamental physics research.
Area of Science:
- Atomic, Molecular, and Optical (AMO) Physics
- Quantum Metrology
Background:
- Laser spectroscopy of trapped atomic ions is crucial for high-precision measurements.
- Traditional methods face limitations in resolution due to various perturbing influences.
Purpose of the Study:
- To review recent advancements in laser spectroscopy for atomic ions.
- To highlight techniques offering extremely high resolution and accuracy.
Main Methods:
- Utilizing laser cooling techniques to minimize ion motion and Doppler shifts.
- Employing single, isolated ions as experimental samples for reduced environmental interactions.
- Storing ions in electromagnetic traps to isolate them from external perturbations.
Main Results:
- Observed atomic resonances with exceptionally narrow line widths (a few parts in 10^11).
- Measurements achieved across a broad frequency range, from radio frequency to ultraviolet.
- Demonstrated potential for experimental accuracies reaching one part in 10^18.
Conclusions:
- Laser spectroscopy of trapped atomic ions offers unprecedented resolution.
- Techniques like laser cooling and single-ion isolation are key to achieving high precision.
- These advancements pave the way for next-generation atomic clocks and fundamental constant measurements.
Related Concept Videos
01:23Atomic Spectroscopy: Absorption, Emission, and Fluorescence
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...
01:29Atomic Emission Spectroscopy: Lab
AES is a powerful analytical technique, especially effective when used with plasma sources, producing abundant spectra in characteristic emission lines. The Inductively Coupled Plasma (ICP), in particular, yields superior quantitative analytical data due to its high stability, low noise, low background, and minimal interferences under optimal experimental conditions. However, newer air-operated microwave sources are emerging as promising alternatives that could be more cost-effective than...
01:20Atomic Emission Spectroscopy: Overview
Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...
01:26Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation
Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used.
There are three main types of inductively coupled plasma atomic emission spectroscopy (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used.
01:22Atomic Emission Spectroscopy: Instrumentation
The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers. Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
01:19Mass 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...