Related Experiment Video
Updated: Feb 8, 2026

08:01
Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
Published on: November 21, 2019
7.7K
A misaligned magneto-optical trap to enable miniaturized atom chip systems
Ritayan Roy1,2, Jo Rushton3, Andrei Dragomir3
1School of Physics and Astronomy, University of Southampton, Highfield, Southampton, SO17 1BJ, United Kingdom. ritayan.roy@u.nus.edu.
Scientific Reports
|July 6, 2018
Summary
Displaced laser beams in mirror-based magneto-optical traps (MOTs) enable compact atom chip experiments. Novel vortex-MOT and hybrid-MOT designs trap large atom numbers, crucial for portable quantum technologies.
Area of Science:
- Atomic, Molecular, and Optical Physics
- Quantum Technologies
- Nanotechnology
Background:
- Magneto-optical traps (MOTs) are essential for laser cooling and trapping atoms.
- Miniaturized atom chip experiments require compact MOT designs with limited optical access.
- Existing MOT configurations often face challenges in single-window optical access scenarios.
Purpose of the Study:
- To investigate the application of displaced laser beams in mirror-based MOTs.
- To develop portable and miniaturized atom chip experiments.
- To explore novel MOT geometries for enhanced atom trapping and cooling.
Main Methods:
- Investigated two displaced beam geometries: vortex-MOT and hybrid-MOT.
- Utilized a planar mirror surface with a modified magnetic field geometry.
- Trapped and cooled Rubidium-85 (⁸⁵Rb) atoms.
Main Results:
- Successfully trapped 6 × 10⁶ atoms in the vortex-MOT and 26 × 10⁶ atoms in the hybrid-MOT.
- Vortex-MOT achieved cooling below the Doppler temperature without additional stages.
- Hybrid-MOT temperature was measured slightly above the Doppler limit.
Conclusions:
- Displaced beam techniques in mirror-MOTs facilitate portable and miniaturized atom chip experiments.
- Achieved significant atom numbers and cooling, essential for quantum applications.
- These advancements pave the way for portable quantum sensors and other quantum technologies.
Related Concept Videos
Social Traps
26.9K
Social traps are negative situations where people get caught in a direction or relationship that later proves to be unpleasant, with no easy way to back out of or avoid. The concept was orignally introduced by John Platt who applied psychology to Garrett Hardin's "Tragedy of the Commons", where in New England herd owners could let their cattle graze in the common ground. This situation seems like a good idea, but an individual could have an advantage. If they owned...
26.9K
Atomic Structure
210.3K
Overview
210.3K
Atomic Mass
70.4K
Atoms — and the protons, neutrons, and electrons that compose them — are extremely small. For example, a carbon atom weighs less than 2 × 10−23 g. When describing the properties of tiny objects such as atoms, we use appropriately small units of measure, such as the atomic mass unit (amu). The amu was originally defined based on hydrogen, the lightest element, then later in terms of oxygen. Since 1961, it has been defined with regard to the most abundant isotope of carbon, atoms of which...
70.4K
Atomic Orbitals
44.6K
An atomic orbital represents the three-dimensional regions in an atom where an electron has the highest probability to reside. The radial distribution function indicates the total probability of finding an electron within the thin shell at a distance r from the nucleus. The atomic orbitals have distinct shapes which are determined by l, the angular momentum quantum number. The orbitals are often drawn with a boundary surface, enclosing densest regions of the cloud.
44.6K
Hybridization of Atomic Orbitals I
67.7K
The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
67.7K
The Energies of Atomic Orbitals
30.3K
In an atom, the negatively charged electrons are attracted to the positively charged nucleus. In a multielectron atom, electron-electron repulsions are also observed. The attractive and repulsive forces are dependent on the distance between the particles, as well as the sign and magnitude of the charges on the individual particles. When the charges on the particles are opposite, they attract each other. If both particles have the same charge, they repel each other.
30.3K

