Nonlinear optical response of planar and spherical CdSe nanocrystals

Journal Article · Fri Jul 15 04:00:00 EDT 2016 · Semiconductors

DOI:https://doi.org/10.1134/S1063782616070228· OSTI ID:22649737

Isaev, A. A.; Vitukhnovsky, A. G. ^[1]; Litvak, V. L. ^[2]; Katsaba, A. V. ^[1]; Korshunov, V. M. ^[3]; Vasiliev, R. B. ^[4]

---

1. Russian Academy of Sciences, Lebedev Physical Institute (Russian Federation)
2. Moscow Institute of Physics and Technology (State University) (Russian Federation)
3. Bauman Moscow State Technical University (Russian Federation)
4. Moscow State University (Russian Federation)

The nonlinear optical response of a colloidal solution of planar CdSe semiconductor nanocrystals (nanoplatelets) is studied for the first time. The nonlinear optical response of these nanoparticles is compared to that of spherical CdSe nanocrystals (quantum dots). The photoinduced nonlinearity is attributed to the optical generation of long-lived charge carriers in the nanoobjects under study. It is shown that, upon the exposure of a cell with the solution of nanoparticles to focused continuous-wave (cw) laser radiation with a wavelength of 473 nm, the nonlinear optical responses of CdSe nanoplatelets and quantum dots are somewhat different at identical optical densities at the above-indicated wavelength. The differences are supposedly associated with a higher diffusion rate of spherical nanoparticles in the solution because of their smaller size compared to that of nanoplatelets.

• OSTI ID: 22649737
• Journal Information: Semiconductors, Journal Name: Semiconductors Journal Issue: 7 Vol. 50; ISSN SMICES; ISSN 1063-7826
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
CADMIUM SELENIDES
CHARGE CARRIERS
COMPARATIVE EVALUATIONS
DIFFUSION
LASER RADIATION
NANOPARTICLES
NONLINEAR PROBLEMS
OPACITY
QUANTUM DOTS
SEMICONDUCTOR MATERIALS