Selected Application
attoDRY800
Single Photon Generation with Controlled Polarization
from InGaN Quantum Dots
The research groups led by Prof. R. Taylor & Dr. R.A. Oliver in the UK have
successfully generated single-photons with polarized light emission and
predefined polarization axis at temperatures spanning from around 5 K to
above 200 K using InGaN quantum dots. These quantum dots offer several
advantages, such as high experimental repetition rates in the range of GHz,
and for their growth as a planar structure, a single routine without complex
geometrical engineering.
The emission spectra of these quantum dots were characterized using mi-
cro-photoluminescence techniques, while the samples were kept cool inside
an optical cryostat equipped with attocube positioners. This cryostat, the
attoDRY800, is able to reach temperatures ranges from below 5 K up to even
above 300 K with very good thermal and vibrational stability.
The single-photons generated by these quantum dots are bright enough to al-
low their optical properties to be measured even above 200 K, a temperature
considered to be the Peltier cooling barrier. Hence, this suggests in principle,
that these quantum dots could be applied in integrated electronic circuits.
And thanks to the achievable polarization control, these quantum dots are
good candidates for on-chip polarization encoding in quantum cryptography.
To know more about the work done by Robert Taylor, Rachel Oliver and their
research teams, please visit their websites here: https://users.physics.ox.ac.
uk/~rtaylor/ and here http://www.gan.msm.cam.ac.uk/directory/oliver
[Data courtesy of R. Taylor, Oxford University]
Further reading:
[1] T. J. Puchtler, R. A Taylor, et al. Nanoscale 2017, 9, 9421-9427
[2] T. Wang, T. J. Puchtler et a.. Nanophotonics. DOI 10.1515/nanoph-2017-0027
[3] T. Wang, T. J. Puchtler Phys. Status Solidi B, 1600724 (2017)
CUSTOMER FEEDBACK CUSTOMER FEEDBACK
Dr. M. Kroner Prof. R. A. Taylor
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! I have to say we are very pleased with the attoDRY800 and
have collected a good deal of data already.
(University of Oxford, Department of Physics,
Oxford, Great Britain)
(Institute for Quantum Electronics, ETH Zurich, Switzerland)
attoCRYO
Research Cryostats
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