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attoCFM II
low temperature scanning confocal microscopes, highly stable and
compact
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The attoCFM II is a compact confocal microscope, which is designed
for in-situ analysis. The microscope is highly stable at low temperature,
high magnetic field, and high vacuum. Moreover, all mechanical
parts are thermally compensated. The design is optimized to reduce
light losses to a minimum and to capture the maximum amount of
light scattered by the illuminated point of the sample.
The one-of-a-kind combination of materials allows absolutely stable
single dot measurements at low temperature over weeks, even when
refilling the bath cryostat with liquid Helium. Furthermore, combining
the attoCFM II with cryogen-free cooling solutions is easily
possible, opening up new possibilities in cryogenic long-term investigations
while considerably reducing operational costs.
Principle - A laser beam is coupled
into one arm of a single mode optical fiber coupler. The fiber
end of the second arm is placed in a ceramic ferrule to guarantee
an accurate position of the fiber in the objective axis. This single
mode fiber illuminates the sample and plays the role of the blocking
pinhole aperture when collecting the scattered light from the sample.
Objective Systems - Objectives with
a large working distance of up to 2.9 mm or with a numerical aperture
of up to 0.68 are available.
An increase of the numerical aperture by a half ball sapphire lens
(solid immersion lens) is possible, thus leading to a resolution
of 150 - 300nm (with red laser light illumination).
Request Quotation & Support : |
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Available
Controller for this Product: |
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FPGA-based, fully digital CFM controller
with xy-scan generator |
| ANC350 |
Piezo positioning controller
for attocube's encoded positioners | |
| ANC300 |
Piezo positioning controller
for attocube's open-loop positioners | |
Complete
System Solutions: |
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Complete system
configurations for this product. |
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| Product
Key Features
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miniaturized
microscopy head |
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designed for highest
stability |
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optimized for
minimal light loss |
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large coarse positioning
range at low temperatures |
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ultra compact
version for 1 inch (25.4 mm) setups available |
| Benefits
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fits
standard cryogenic and magnet sample spaces |
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minimized drifts
enable long-term measurements |
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excellent stability
in high magnetic fields |
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highest measurement
sensitivity |
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access to a large
area on the sample surface |
| Photoluminescence intensity of a triply charged InAs
quantum dot vs. magnetic field (red corresponds to high
intensity) recorded at cryogenic temperature using the
attoCFMII. (Hybridization of electronic states in
quantum dots through photon emission by K. Karrai
et. al. Nature (2004) 247, 8, 135). |
| Confocal image of a tweezers structure; the tweezers
are freely suspended. The size of the image is 30 x 30
mm recorded in reflection mode. The 200 µm wide structures
are resolved with an excitation laser source of 630 nm!
(C. Meyer et al., ‘Slip-stick step-scanner for scanning
probe microscopy’, Rev. Sci. Instrum. (2005) 76,
063706). |
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