Exciton fine structure splitting in InP quantum dots in GaInP
(2007) In Journal of Physics: Condensed Matter 19(29). Abstract
 We have investigated the electronic structure of excitons in InP quantum dots in GaInP. The exciton is theoretically expected to have four states. Two of the states are allowed to optically decay to the ground ( vacuum) state in the dipole approximation. We see these two lines in photoluminescence (PL) experiments and find that the splitting between the lines ( the fine structure splitting) is 150(+/ 30) mu eV. The lines were perpendicularly polarized. We verified that the lines arise from neutral excitons by using correlation spectroscopy. The theoretical calculations show that the polarization of the emission lines are along and perpendicular to the major axis of elongated dots. The fine structure splitting depends on the degree of... (More)
 We have investigated the electronic structure of excitons in InP quantum dots in GaInP. The exciton is theoretically expected to have four states. Two of the states are allowed to optically decay to the ground ( vacuum) state in the dipole approximation. We see these two lines in photoluminescence (PL) experiments and find that the splitting between the lines ( the fine structure splitting) is 150(+/ 30) mu eV. The lines were perpendicularly polarized. We verified that the lines arise from neutral excitons by using correlation spectroscopy. The theoretical calculations show that the polarization of the emission lines are along and perpendicular to the major axis of elongated dots. The fine structure splitting depends on the degree of elongation of the dots and is close to zero for dots of cylindrical symmetry, despite the influence of the piezoelectric polarization, which is included in the calculation. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/record/645592
 author
 Ellström, Carl ^{LU} ; Seifert, Werner ^{LU} ; Pryor, C.; Samuelson, Lars ^{LU} and Pistol, MatsErik ^{LU}
 organization
 publishing date
 2007
 type
 Contribution to journal
 publication status
 published
 subject
 in
 Journal of Physics: Condensed Matter
 volume
 19
 issue
 29
 publisher
 IOP Publishing
 external identifiers

 wos:000247929700013
 scopus:34547346633
 ISSN
 1361648X
 DOI
 10.1088/09538984/19/29/295211
 language
 English
 LU publication?
 yes
 id
 4ae1568e88194af994e109cd14742c9d (old id 645592)
 date added to LUP
 20071210 16:01:55
 date last changed
 20170101 07:09:03
@article{4ae1568e88194af994e109cd14742c9d, abstract = {We have investigated the electronic structure of excitons in InP quantum dots in GaInP. The exciton is theoretically expected to have four states. Two of the states are allowed to optically decay to the ground ( vacuum) state in the dipole approximation. We see these two lines in photoluminescence (PL) experiments and find that the splitting between the lines ( the fine structure splitting) is 150(+/ 30) mu eV. The lines were perpendicularly polarized. We verified that the lines arise from neutral excitons by using correlation spectroscopy. The theoretical calculations show that the polarization of the emission lines are along and perpendicular to the major axis of elongated dots. The fine structure splitting depends on the degree of elongation of the dots and is close to zero for dots of cylindrical symmetry, despite the influence of the piezoelectric polarization, which is included in the calculation.}, articleno = {295211}, author = {Ellström, Carl and Seifert, Werner and Pryor, C. and Samuelson, Lars and Pistol, MatsErik}, issn = {1361648X}, language = {eng}, number = {29}, publisher = {IOP Publishing}, series = {Journal of Physics: Condensed Matter}, title = {Exciton fine structure splitting in InP quantum dots in GaInP}, url = {http://dx.doi.org/10.1088/09538984/19/29/295211}, volume = {19}, year = {2007}, }