Biomedical Engineering Reference
In-Depth Information
(
a
) The trion-like state
1
02
X
has satellite after mixing with the biexciton resonance
02
02
X
,
Fig. 10.9
as shown in (
b
). Notice inset shows no splitting when
V
F
=
0. Comparison of (
c
)and(
d
) confirms
mixing of FRET satellites between direct and trion-like biexciton states; FRET signature on direct
biexciton state is weaker by an order of magnitude. Simulation parameters according to Appendix
Tabl e
10.3
. Rolon, J.E., Ulloa, S.E.: Phys. Rev. B
79
, 245309 (2009). (2011) American Physical
Society
within the region enclosed by the dashed box. Most remarkably, the amplitude of
the FRET peak steadily increases as the field is swept away from the molecular
anticrossing, which corresponds to a further projection of the exciton dynamics
into the relevant subspace spanned by the FRET coupled states
1
02
X
and
2
11
X
.These
results indicate that in experiments one can enhance the FRET signal (obtaining a
better contrast) by just increasing the field.
In order to support more our arguments we constructed LACS population maps
of both of the hybridized states, at fixed
F
10 kV/cm, within the region shown in
dashed box at the bottom of Fig.
10.8
a. These maps appear in Fig.
10.9
,whichshows
almost identical level anticrossing signatures around
h
−
1251, for both
1
02
X
and
ω
∼
20
11
X
states, with the sum of the population at the peak maxima, in Fig.
10.9
c, d, plus
the amplitude of the vacuum, adding up to near unity.
