TY - JOUR
T1 - Size dependence of Second Harmonic Generation in CdSe nanocrystals
AU - Jacobsohn, M.
AU - Banin, U.
PY - 1999
Y1 - 1999
N2 - Second Harmonic Generation in CdSe nanocrystal quantum dots is observed by Hyper-Rayleigh scattering. We use a Ti-Sapphire femtosecond laser at 820 nm to induce the nonlinear optical response of the nanocrystals in solution. The unit cell normalized second harmonic coefficient βn, shows a substantial systematic enhancement in small sizes. The observed size dependence of the second harmonic generation process, is explained assuming two contributions. The first is a bulk-like contribution, from the non-centrosymmetric nanocrystal core, and the second, a contribution from the particle surface. The latter contribution is most significant in small nanocrystals with a substantial proportion of surface atoms.
AB - Second Harmonic Generation in CdSe nanocrystal quantum dots is observed by Hyper-Rayleigh scattering. We use a Ti-Sapphire femtosecond laser at 820 nm to induce the nonlinear optical response of the nanocrystals in solution. The unit cell normalized second harmonic coefficient βn, shows a substantial systematic enhancement in small sizes. The observed size dependence of the second harmonic generation process, is explained assuming two contributions. The first is a bulk-like contribution, from the non-centrosymmetric nanocrystal core, and the second, a contribution from the particle surface. The latter contribution is most significant in small nanocrystals with a substantial proportion of surface atoms.
UR - http://www.scopus.com/inward/record.url?scp=0033728388&partnerID=8YFLogxK
U2 - 10.1557/proc-571-253
DO - 10.1557/proc-571-253
M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???
AN - SCOPUS:0033728388
SN - 0272-9172
VL - 571
SP - 253
EP - 258
JO - Materials Research Society Symposium - Proceedings
JF - Materials Research Society Symposium - Proceedings
ER -