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attoCFM I
low temperature, scanning confocal microscope, highly modular and flexible
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The attoCFM I has been developed to offer highest flexibility
in order to enable adaptation of the experimental setup according
to the customer‘s needs. This flexibility is realized by
a modular beam splitter head which is positioned outside of the
cryostat. Furthermore, the free-beam optical design allows a completely
independent adjustment of the excitation and collection port. Therefore,
applications such as Raman spectroscopy become accessible by appropriately
filtering the excitation and collection signals. The easy handling
opens up new possibilities in quantitative surface characterization
in the sub-micron range.
Principle - A scheme of the attoCFM I microscope as well as a photo of the beam splitter module is shown below. A laser beam is coupled
into a single mode optical illumination fiber. Part of this light
is reflected on the beam splitter and focused on the sample (free-beam
optics inside the cryostat). The reflected light from the sample
is captured by the collection fiber, which acts as the blocking
pinhole aperture when collecting the scattered light from the sample.
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| Scheme of the cryogenic confocal microscope based on free-beam optics |
attoCFMI beam splitter module |
Objective Systems - attocube systems offers several objectives
which can be adjusted depending on your experimental requirements,
the wavelength range, working distance, and other parameters. For
customized solutions, please contact our office.
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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optical setup
offering highest flexibility |
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modular beam splitter head
outside of cryostat |
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wavelength and polarization
filtering of the excitation and collection signal possible |
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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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very broad variety
of applications, ranging from classical CFM measurements
to Raman spectroscopy |
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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 |
A color-scale plot of the photoluminescence
(PL) versus gate voltage showing the discrete spectral lines of a quantum dot
recorded with the attoCFMI at a cryogenic temperature of 1.6K. (Optical
emission from a charge-tunable quantum ring by R. J. Warburton et.
al. 2000 Nature 405, 926) |
| Confocal image of a chess board grating (SiO2 on Si)
with a period of 2 mm, recorded in reflection mode. The
sample has some defects on the surface structure which
are clearly resolved. The image was recorded with the attoCFMI
in reflection mode. |
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