Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multiple exciton generation in nano-crystals revisited: Consistent
  calculation of the yield based on pump-probe spectroscopy   Multiple exciton generation (MEG) is a process in which more than one exciton
is generated upon the absorption of a high energy photon, typically higher than
two times the band gap, in semiconductor nanocrystals. It can be observed
experimentally using time resolved spectroscopy such as the transient
absorption measurements. Quantification of the MEG yield is usu- ally done by
assuming that the bi-exciton signal is twice the signal from a single exciton.
Herein we show that this assumption is not always justified and may lead to
significant errors in the estimated MEG yields. We develop a methodology to
determine proper scaling factors to the signals from the transient absorption
experiments. Using the methodology we find modest MEG yields in lead
chalcogenide nanocrystals including the nanorods.

13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th