Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Energy spectrum of confined positively charged excitons in single
  quantum dots   A theoretical model, which relates the binding energy of a positively charged
exciton in a quantum dot with the confinement energy is presented. It is shown
that the binding energy, defined as the energy difference between the
corresponding charged and neutral complexes confined on the same excitonic
shell strongly depends on the shell index. Moreover, it is shown that the ratio
of the binding energy for positively charged excitons from the $p$- and
$s$-shells of a dot depends mainly on the nearly perfect confinement in the
dot, which is due to the "hidden symmetry" of the multi-electron-hole system.
We applied the theory to the excitons confined to a single GaAlAs/AlAs quantum
dots. The relevant binding energy was determined using the
micro-photoluminescence and micro-photoluminescence excitation
magneto-spectroscopy. We show that within our theory, the confinement energy
determined using the ratio of the binding energy corresponds well to the actual
confinement energy of the investigated dot.

33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
19
The categories of this paper are: eess
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
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The categories of this paper are: econ
14
The categories of this paper are: math-ph