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Kelvin Nanotech gMOT紧凑型光栅磁光阱芯片

Kelvin Nanotech gMOT紧凑型光栅磁光阱芯片

Kelvin Nanotech gMOT一种用于产生超冷原子的紧凑型光栅磁光阱芯片。

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Kelvin Nanotech gMOT一种用于产生超冷原子的紧凑型光栅磁光阱芯片。

gMOT

A compact grating Magneto-Optical Trap chip for the generation of ultra-cold atoms.

 Kelvin Nanotechnology Ltd,

gMOT产品咨询：185 0219 3480

磁光陷阱光栅介绍

一种衍射光学元件，与传统的6束MOT相比，它提高了冷原子源创建的对准、设置和小型化的容易性。

该技术只需要单个激光束，可以在蒸汽电池内部或外部使用；使得快速变化的冷原子实验的灵活性成为可能。光栅MOT（gMOT）已引起量子技术界的极大兴趣，并有望成为利用冷原子进行定时和传感应用的量子系统的核心。

Features

Performance

  • Trapping over 10 million 87Rb atoms

  • Cooling below 40 µK

  • Atom Clouds denser than 1010/cm3

Application
Central to quantum technology research.

Simplification
Enables laser cooling with a single laser beam while significantly reducing the overall system volume, optical access requirements, apparatus complexity and cost.

Adaptable
Can operate either inside the vapour chamber or externally through a suitable window.

Validation
Each chip supplied with actual atom number and cooling data.

This work was published in Nature Nanotechnology.

Grating Magneto-Optical Trap. Laser cooling is greatly simplified, requiring only one laser beam incident on the grating for each stage of laser cooling. The other required beams are generated by diffraction from the grating.

Specifications

Performance Specifications

Loading rate of atoms into the MOT – >5×106 /sec
Steady state number of atoms in MOT – ~107
Temperature – 3 µK to 40 µK
Density – >1010 /cm3

Chip Physical Specifications

Dimensions: 22 x 22 x 0.5 mm
Grating region: 20 x 20 mm
Material coating: Aluminium
Chip material: Silicon
Weight: 0.6 g

Input Laser Beam Requirements

Wavelength: 780.24 nm
Frequency detuning: ~12 MHz
Power: ~50 mW
Polarisation: Circular polarised (Stokes parameter |S3|≥0.9)
Collimation: Divergence angle, |θ|≤0.1o
Incident angle: Normal +/- 1o
Beam size radius: 1/e2 radius ~17 mm

Vacuum and Magnetic Requirements

Base pressure: <1 x 10-9 mbar
Rb partial pressure: <5 x 10-9 mbar
Magnetic field: Quadrupole coils aligned with chip. Axial gradient of 0.1 T/m
Ambient DC field: ≤10 µT

 Kelvin Nanotechnology Ltd,

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