attoDRY800
optical cryostat
cold breadboard integrated into optical table
obstruction-free work space & optical access
market leading low drift & vibration performance
enables sensitive long-term measurements
high quality vacuum system with turbo pump
keeps your samples clean
Quantum optics experiments often require cryogenic temperatures in combination with optical access to the sample space. Most experimental setups contain numerous optical elements that need to be precisely arranged on an optical table to shape and prepare the incident light, as well as to efficiently collect and convert the emitted light from the sample. The available space on the optical table in such cases is of paramount importance to many complex setups.
The revolutionary concept and design of the attoDRY800 optical cryostat present the perfect solution to satisfy these demanding requirements: it consists of an ultra low vibration cold breadboard platform which is fully integrated into an optical table. The cryocooler assembly is located in the otherwise unused space underneath. This unique design ensures a free workspace and unobstructed optical access to the cold sample from all directions on the optical table. Apochromatic objectives with high numerical aperture (NA=0.81-0.95) can either be integrated into the cryostat, into the vacuum shield, or put in close working distance next to the optical windows from the outside. This ensures extremely low drifts and optimal collection efficiency.
Being a closed-cycle cryostat, the attoDRY800 is the perfect replacement for all optical helium flow cryostat setups, adding the huge advantage that it requires no liquid cryogens and thus minimizing running costs. In addition, a fully automated temperature control between 3.8 and 320 K conveniently enables unattended long measurement cycles. Most other off-the-shelf closed-cycle cryostats suffer from severe vibrations at the sample location, which typically are in the range of many microns. Thanks to our patented vibration isolation technique, the residual vibrations on the cold plate of the attoDRY800 were measured to be around 2.6 nm peak-to-peak (vertical direction) only. Hence, with the attoDRY800 optical cryostat even extremely sensitive measurements are possible. Its cold breadboard sample space is designed to host several of attocube’s patented nanopositioners, as well as complete microscope or photonic probe station solutions.
attoDRY800 Article
"Optical cryostat proves a game-changer in quantum communication studies"
read the Physics World article featuring the pioneering research of Dr. Tobias Heindel
Choose your favorite Shroud
Vacuum Shrouds
Anticipating typical configurations, we have designed several standard vacuum shrouds and cold shields for the attoDRY800/800xs optical cryostat, that are intended for certain types of positioners, sample holders, working distances and objectives. These options constitute an economic pre-configured set of components that give the user a head start for his research with optics at low and variable temperatures.
The vacuum shroud can have an almost arbitrary shape depending on the experimental needs of each user. We distinguish between standard configurations, which cover the most typical applications, and fully customized configurations.
Specifications
For a detailed definition of used terms and descriptions please visit our Closed-Cycle Cryostats Glossary
| General Specifications | |
|---|---|
| technology | low vibration, closed-cycle cryostat intimately integrated into optical table (sold separately) |
| sample environment | cryogenic vacuum, sample cooled via braids (ATC100) |
| sample space | 75 mm (diameter) |
| sample exchange | easy access via removal of vacuum shroud |
| usability | fully automated temperature control (vacuum, cooldown, T control, warmup), all pumps integrated, USB interface for remote control |
| vibration & acoustic noise damping system | proprietary low vibration design |
| Performance Data | |
| temperature range | 3.8 .. 320 K (depending on configuration) |
| base pressure (in sample chamber) | < 5e-6 mbar |
| leak rate of vacuum | < 5e-9 mbar l/s |
| cool down time (incl. pumping time) | < 4.5 h to 5 K (depending on thermal load) |
| cooling power at cold plate | > 170 mW @ 5 K |
| vibration level (cold plate, vertical) | < 5 nm (peak-to-peak@1500 Hz) |
| Compressor | |
| power consumption | max. 3 kW |
| cooling of compressor | water cooling (default; requires local infrastructure) |
| Size and Dimensions | |
| optical table | standard size 900 mm x 1800 mm x 305 mm (leg height 597 mm), other table sizes available; metric or imperial mounting threads |
| Options and Upgrades | |
| temperature controller | included |
| pumping kit | included |
| vacuum shroud | Basic (standard shroud); upgrade options: RT-SWD, RT-USWD, LT-APO objective, HV objective, Photonic Probe Station, or customized height, diameter, windows & working distance |
| electrical access | 36 customer wires included, heat sunk @ 4 K (additional wiring on request) |
| feedthroughs | electrical (DC, HF), optical fibers, gas capillary (on request) |
| sample motion | low temperature positioners |
| cryostat compressor upgrade | air-cooled (grey-room recommended) |
| flexlines | extension to 13 m or 20 m (instead of 6 m) |
| air-compressor | for active vibration isolation of table |
| Compatibility | |
| confocal Raman microscopes | cryoRaman (on request) |
| Cryogenic Photonic Probe Station | confocal microscope with 2 fiber probes for side excitation/detection |
Vibration measurements on cold plate of attoDRY800
The interferometric measurements on the left show vertical & horizontal displacement data measured directly on the cold plate of the attoDRY800. The peak-to-peak vibrations in vertical direction are around 3 nm (4 nm), while in lateral direction they are around 2 nm (17 nm) in a bandwidth of 200 Hz (1500 Hz). This very efficient and unique low vibration design even allows for very sensitive optical measurements such as optical probe stations or high resolution optical spectroscopy on nanostructures.
The FFT of the data on the right is shown above as well for both directions, vertical and horizontal respectively, at a bandwidth of 1500 Hz. The dashed line at 1 pm indicates the noise floor of the interferometer.
| Direction |
Peak-to-Peak |
RMS |
| vertical | 3 nm (4 nm) | 1.0 nm (1.1 nm) |
| horizontal | 2 nm (17 nm) | 0.6 nm (2.1 nm) |
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Features
Fields of Applications
Optics and Spectroscopy
Confocal microscopy and nanoscale spectroscopy at low temperatures and in high magnetic fields on quantum dots, NV centers, 2D materials, nanowires and other materials.
Mesoscopic Physics
Magnetotransport measurements on mesoscopic structures at variable temperatures and in high magnetic fields.
Materials Science
Systems for microscopy and nanoscale analysis of material properties at ambient and low temperature and in high magnetic fields.
Surface Science
Imaging and scanning probe microscopy of surface properties on the nanoscale at variable temperatures down to milli Kelvin and combination with high magnetic fields.
Application Snippets
Customer Feedback
Prof. R. A. Taylor
University of Oxford, Department of Physics, Oxford, Great Britain
I have to say we are very pleased with the attoDRY800 and have collected a good deal of data already.
Dr. M. Kroner
Institute for Quantum Electronics, ETH Zurich, Switzerland
The attoDRY800 setup is ideal for phase contrast microscopy as it allows free space optical access to the sample from both sides and makes it easily possible to investigate the transmitted light in momentum and real space excellent!
Dr. Heindel
TU Berlin, Institute of Solid State Physics, Berlin, Germany
Our group is working on quantum optics experiments exploiting deterministic quantum light sources based on semiconductor quantum dots. The two attoDRY800 systems will be used to probe the mututal two-photon interference of remote quantum emitter located in both cryostats. We are keen on the exciting experiments possible with these very stable cryostat systems.
Prof. Michael R. Vanner
Imperial College London, Quantum Measurment Lab, London, GB
The attoDRY800 meets our demanding science needs and we are very happy with the system. The installation went smoothly and we enjoyed the discussions and training session with the engineer. Since the installation, the system has operated without error and attocube have been very helpful with all of our follow up questions.
