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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 micro-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 allow 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 learn more about the work done by Robert Taylor, Rachel Oliver and their research teams, visit their websites here: R. Taylor and R. Oliver

attoDRY800 - Choose the suitable Vacuum Shroud for your Experiment

For experiments similar to the ones described above by the group of Prof. R. Taylor, the following vacuum shroud option is recommended:

RT-SWD

The RT-SWD vacuum shroud constitutes the standard solution for using a short working distance objective at room temperature with a cold sample sitting on a stack of xyz positioners. A scanner and electrical contacts at the sample holder are optionally available. Read more...

For more information on all other vacuum shroud options visit our webpage…