Selected Applications
attoCFM I
Observation of Many-Body Exciton States
The image on the left shows a 3D map of the photoluminescence of a single InAs/
GaAs quantum dot in a charge-tunable device [1]. It was found that the coupling
between the semiconductor quantum dot states and the continuum of the Fermi
sea gives rise to new optical transitions, manifesting the formation of ma-
ny-body exciton states. The experiments are an excellent proof for the stability
of the attoCFM as the measurements took more than 15 hours without the need
for re-alignment.
[1] N. A. J. M. Kleemans et al., Nature Physics 6, 534 - 538 (2010).
10
Corrected by dead time
Directly detected by Si APD
Out of a single moder fiber:
~ 27 million/s purse & identical
single photons
(end-user efficiency ~ 34%)
8
6
π pulse
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2
0
0.0
0.5
1.0
1.5
2.0
2.5
Laser field amplitude (nW 0.5 )
3.0
Scalable Architecture for Multi-Photon Boson Sampling
Research groups led by Jian-Wei Pan & Chao-Yang Lu in China and Sven Höfling in
Germany & UK have successfully demonstrated the first quantum simulator based
on single photons that beats early classical computers. In Nature Photonics, they
report on “High-efficiency multiphoton boson sampling“, implementing 3-, 4-,
and 5-boson-sampling with rates which are more than 24,000 times faster than all
previous experiments, and 10-100 times faster than the first electronic computer
(ENIAC) and transistorized computer (TRADIC) in human history. Their work, which
was carefully prepared and accompanied by their 3 previous papers published in PRL
(see below), kick starts a new era of photonic quantum technologies—going beyond
proof-of-principle demonstrations and building a quantum machine to actually race
against different generations of classical computers. In recognition of their achie-
vements in quantum teleportation research, the very active and highly respected
Chinese group recently also won the 2015 Physics World Breakthrough of the Year
award and the 2015 State Nature Science First Class Award in China. In addition,
Chao-Yang Lu was portrayed by Nature last summer as one of the “Science stars of
China”. For their quantum dot experiments, his group uses three attoDRY cryostats
equipped with attocube positioners, scanners and cryogenic objectives. Visit the
group’s homepage for more information on their experiment.
[1] Hui Wang, Yu He, et al., Nature Photonics 11, 361–365 (2017).
[2] Yu He, X. Ding, et al., Phys. Rev. Lett. 118 , 190501 (2017).
[3] Xing Ding, Yu He ,et al., Phys. Rev. Lett. 116, 020401(2016).
[4] Hui Wang, Z.-C. Duan, et al., Phys. Rev. Lett. 116, 213601 (2016).
attoMICROSCOPY
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