Quantum optics experiments frequently require cryogenic temperatures together with optical access to the sample space. A majority of experimental setups contain several optical elements that need to be precisely organized on an optical table to shape and prepare the incident light, as well as to efficiently gather and convert the emitted light from the sample. The available space on the optical table in such cases is of vital importance to many intricate setups.
The ground-breaking concept and design of the attoDRY800 presents the ideal solution to fulfill these challenging requirements: it comprises of an ultra-low vibration cold breadboard platform which is completely integrated into an optical table. The cryocooler assembly is placed in the otherwise vacant space underneath.
This unique design guarantees a free workspace and unobstructed optical access to the cold sample from all directions on the optical table via four side and one top window. Apochromatic objectives with high numerical aperture (NA=0.81-0.95) can either be incorporated into the vacuum shield, into the cryostat, or put in close working distance next to the optical windows from the outside. This guarantees very low drifts and optimal collection efficiency.
Being a closed-cycle cryostat, the attoDRY800 is the ideal replacement for all helium flow cryostat installations, adding the huge benefit that it requires no liquid cryogens and therefore reducing running costs. Moreover, a fully automated temperature control between 3.8 and 320 K conveniently allows unattended long measurement cycles.
Most other off the shelf closed-cycle cryostats suffer from severe vibrations at the sample location, which usually are in the range of many microns. Owing to a patented vibration isolation method, the residual vibrations on the cold plate of the attoDRY800 were measured to be about 2.6 nm peak-to-peak (vertical direction) only. Hence, with the attoDRY800 even very sensitive measurements are possible. Its cold breadboard sample space is engineered to host a number of attocube’s patented nanopositioners, as well as full microscope or photonic probe station solutions.
Key Features of the Cryo-Optical Table
- Low vibrations < 5 nm peak-to-peak
- Cold breadboard integrated into optical table
- Customizable vacuum shroud
- Fully automated variable temperature 3.8 .. 320 K
Benefits of the Cryo-Optical Table
- Obstruction-freeworkspace and optical access
- Low running costs (no liquid cryogens)
- High sample throughput because of rapid cool down
- Flexible combination with attocube equipment: patented cryogenic positioning solutions with multi-degrees of freedom
- Optical table included (different sizes available)
- 36 customer wires included, heat sunk @ 4 K
- Turbo pump incl. base pressure in sample chamber <5e-6 mbar
Application Examples of the Cryo-Optical Table
- Quantum dot spectroscopy
- Quantum information processing
- Photocurrent / photoconductivity
- Plasmonics on 2D materials
- Scanning probe microscopy
- Resonant fluorescence
- Reflectance / transmittance measurements
- Micro-Raman imaging and spectroscopy
- Time-resolved spectroscopy
- Optically detected nuclear magnetic resonance
- Optical resonators coupled to waveguides
Fields of Application
Quantum Dot Spectroscopy
Photocurrent / Photoconductivity Measurements
Micro-Raman Imaging / Spectroscopy
Optically Detected Nuclear Magnetic Resonance
Quantum Information Processing