Ultrafast optical control of semiconductor spin qubits toward ...
Ultrafast optical control of semiconductor spin qubits toward ...
Ultrafast optical control of semiconductor spin qubits toward ...
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Indistinguishable Single Photons<br />
from Two Independent 19 F:ZnSe Sources<br />
K. Sanaka et al., to appear in Phys. Rev. Lett.<br />
28nm<br />
1nm<br />
28nm<br />
15nm<br />
100nm<br />
ZnMgSe<br />
ZnMgSe<br />
ZnSe<br />
GaAs<br />
F:ZnSe QW<br />
Coincidence count rates as a function <strong>of</strong> delay time<br />
(Hong-Ou-Mandel dip)<br />
a<br />
Coincidence<br />
probability<br />
b<br />
0.68 0.96<br />
Coincidence<br />
probability<br />
ZnMgSe/ZnSe<br />
nanostructure B<br />
GaAs<br />
substrate<br />
42m<br />
ZnMgSe/ZnSe<br />
nanostructure A<br />
Pulse laser<br />
spot region<br />
c<br />
Coincidence probability<br />
Delay (ns)<br />
Delay (ns)<br />
Minimum<br />
coincidence<br />
0.68<br />
source<br />
A<br />
source<br />
B<br />
t<br />
50%-50%<br />
beamsplitt<br />
er<br />
Visibility<br />
Indistinguishability<br />
Coherence time<br />
Interferometer delay time (ns)<br />
PC<br />
V <br />
0.2ns PC 0<br />
P 0.2ns<br />
C<br />
I 65 13%<br />
<br />
<br />
74 38 ps<br />
C<br />
<br />
31 %<br />
<br />
<br />
23
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