Two-photon absorption processes in semiconductor quantum dots

Two-photon absorption processes in semiconductor quantum dots

The two-photon absorption process is a nonlinear phenomenon that shows very low optical efficiency in bulk semiconductors. For this reason the detection of these processes becomes very difficult from the experimental point of view. Nevertheless, when dealing with semiconductor QD's with few nanometer radii, these transitions are enhanced and the detection is possible. In this contribution we present analytical calculations for the absorption coefficient in CdSe spherical QD's subjected to these second order processes, as a function of the characteristic dot parameters. The intensities of the absorption peaks, as well as the statistical treatment involving QD's ensembles, are also reported.

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Main Authors: López Gondar,J., Cipolatti,R., Marques,G. E.
Format: Digital revista
Language:English
Published: Sociedade Brasileira de Física 2006
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332006000600043
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spelling oai:scielo:S0103-973320060006000432006-11-29Two-photon absorption processes in semiconductor quantum dotsLópez Gondar,J.Cipolatti,R.Marques,G. E. Nonlinear absorption Two-photon absorption Quantum dots The two-photon absorption process is a nonlinear phenomenon that shows very low optical efficiency in bulk semiconductors. For this reason the detection of these processes becomes very difficult from the experimental point of view. Nevertheless, when dealing with semiconductor QD's with few nanometer radii, these transitions are enhanced and the detection is possible. In this contribution we present analytical calculations for the absorption coefficient in CdSe spherical QD's subjected to these second order processes, as a function of the characteristic dot parameters. The intensities of the absorption peaks, as well as the statistical treatment involving QD's ensembles, are also reported.info:eu-repo/semantics/openAccessSociedade Brasileira de FísicaBrazilian Journal of Physics v.36 n.3b 20062006-09-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332006000600043en10.1590/S0103-97332006000600043
institution SCIELO
collection OJS
country Brasil
countrycode BR
component Revista
access En linea
databasecode rev-scielo-br
tag revista
region America del Sur
libraryname SciELO
language English
format Digital
author López Gondar,J.
Cipolatti,R.
Marques,G. E.
spellingShingle López Gondar,J.
Cipolatti,R.
Marques,G. E.
Two-photon absorption processes in semiconductor quantum dots
author_facet López Gondar,J.
Cipolatti,R.
Marques,G. E.
author_sort López Gondar,J.
title Two-photon absorption processes in semiconductor quantum dots
title_short Two-photon absorption processes in semiconductor quantum dots
title_full Two-photon absorption processes in semiconductor quantum dots
title_fullStr Two-photon absorption processes in semiconductor quantum dots
title_full_unstemmed Two-photon absorption processes in semiconductor quantum dots
title_sort two-photon absorption processes in semiconductor quantum dots
description The two-photon absorption process is a nonlinear phenomenon that shows very low optical efficiency in bulk semiconductors. For this reason the detection of these processes becomes very difficult from the experimental point of view. Nevertheless, when dealing with semiconductor QD's with few nanometer radii, these transitions are enhanced and the detection is possible. In this contribution we present analytical calculations for the absorption coefficient in CdSe spherical QD's subjected to these second order processes, as a function of the characteristic dot parameters. The intensities of the absorption peaks, as well as the statistical treatment involving QD's ensembles, are also reported.
publisher Sociedade Brasileira de Física
publishDate 2006
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332006000600043
work_keys_str_mv AT lopezgondarj twophotonabsorptionprocessesinsemiconductorquantumdots
AT cipolattir twophotonabsorptionprocessesinsemiconductorquantumdots
AT marquesge twophotonabsorptionprocessesinsemiconductorquantumdots
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