Heavy introduction: low temperature and strong magnetic field atomic force / confocal microscope mK-class dry dilution refrigerator
Recently, various fields of condensed matter physics have been further developed. Scientists have great interest in quantum optics, quantum optical mechanisms and other measurement results in extremely low temperature regions below 100 mK. For example, the study of the coupling effect of a quantum resonator with a quantum dot, a single spin in a diamond, or a highly tidy optical cavity; the study of the magnetic resonance force of a single-electron mass detected by a single molecule; and the detection of a single quantum dot, photoelectric by resonance fluorescence spectroscopy Conductivity, Kondo excitons, and studies on spin cooling and nuclear polarization; various ultra-low temperature experiments such as optical probing magnetic resonance imaging for magnetic imaging have become possible in the near future.
At present, it has become possible to implement the above various extremely low temperature experiments in a dry dilution refrigerator including free optical path confocal optical research. Attocube has always maintained a close working relationship with top scientists, and has continuously provided a new experimental platform for quantum optics to ensure that scientists conduct breakthrough research.
Fig.1 AttoAFM/CFM low temperature strong magnetic field atomic force/confocal microscope
Recently, Attocube of Germany cooperated with Leiden Cryogenics and Prof. Patrick Maletinsky of Switzerland to launch the mK dry dilution chiller for low temperature and strong magnetic field atomic force/confocal microscopy (see Figure 1). The system continues to assist quantum sensors and mK imaging research in Basel, Switzerland. The device uses a key design for top injection, which guarantees rapid sample and probe replacement. The bottom injection typically takes 24-28 hours, while the top injection requires only 8 hours to change samples. This critical design makes ultra-low temperature scanning probe microscopy experiments more time efficient.
Figure 2 AttoAFM III tuning fork atomic force microscope measures the 20nm high microstructure morphology at 62mK (left);
AttoAFM/CFM Atomic Force/Confocal Microscopy to Test Microstructure Morphology at 60mK (Right)
Fortunately, the attoAFM/CFM atomic force/confocal microscope provides excellent topography in extremely low temperatures after testing in the Leiden Dry Dilution Refrigerator System (Figure 2). Not limited to the Leiden dry dilution chiller, attocube also tested in the dry dilution chiller from BluFors Cryogenics and achieved good results (Figure 3).
Figure 3 AttoAFM I atomic force microscope measures the microstructure of the microstructure at 40mK (left);
AttoAFM/CFM Atomic Force/Confocal Microscopy to Test Microstructure Morphology at 55mK (Right)
The attoAFM/CFM low temperature magnetic field atomic force/confocal microscope has a confocal microscope function, and the attoCFM I external optical head is placed above the sample plunger. Although the sample is at the center of the magnetic field and has a long distance from the optical window, the optical head allows the device to perform all normal confocal optical experiments. The attoCFM I optical head features multiple optical channels for easy adjustment and long-term stability.
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