Platform Integration – Example
3
2
AFM/CFM with Free-Beam Optics for
NV Magnetometry in Top-loading DR
In close collaboration with Leiden Cryogenics and
the Quantum Sensing group of Patrick Maletinsky
(University of Basel, Switzerland), we have develo-
ped a complete mK AFM/CFM based on a closed-cycle
top-loading DR. The system is used for quantum
sensing and imaging at mK temperatures. The top-
loading probe minimizes the turnaround time upon
tip or sample exchange to only ~8 hours instead of
24-48 hours for warming up the whole DR. Long
turnaround time can quickly become a prohibitive
shortcoming for efficient SPM measurements.
1
The combined AFM/CFM features a free-beam con-
focal microscope, with the attoCFM I external optics
head sitting on top of the top-loading insert.
Despite long distance to the magnetic field center
where the sample is mounted, attoAFM/CFM allows
for the full range of confocal applications with all
the flexibility of having several optical channels
featuring easy alignment and very high long-term
stability. The microscope module itself has been
completely redesigned for the mK environment,
as well as carefully thermalized and wired. In this
configuration, a base temperature of 38 mK at the
sample location has been achieved.
4
Customer
5
Prof. Patrick Maletinsky
(University of Basel, Switzerland)
Project
1
Top
Loader
6
5 4
7
01 Leiden Cryogenics dry DR
02 top-loading insert
03 attoCFM I external optics head for
free-beam confocal microscopy
Setup:
04
05
06
07
08
8
vector magnet
attoAFM/CFM microscope module for mK
cryogenic objective
AFM with the Akiyama probe
sample
mK AFM/CFM for NV Magnetometry
+
+
Top-loading
DR Leiden Cryogenics
mK AFM/CFM
Bottom
Loader
mK Positioners