Low-threshold anti-Stokes frequency conversion in Zn{sub 0.6}Cd{sub 0.4}S microcrystals with adsorbed metal-organic nanoclusters

Journal Article · Fri Aug 27 00:00:00 EDT 2010 · Quantum Electronics (Woodbury, N.Y.)

DOI:https://doi.org/10.1070/QE2010V040N06ABEH014256· OSTI ID:21471334

Ovchinnikov, O V; Smirnov, M S; Latyshev, A N; Leonova, L Yu; Kosyakova, E A; Klyuev, V G; Tat'yanina, E P ^[1]

---

1. Voronezh State University, Voronezh (Russian Federation)

We demonstrate the feasibility of low-threshold (10{sup -4} to 10{sup -2} W cm{sup -2}) anti-Stokes conversion of photons in the range 1.72 - 2.00 eV to luminescence at 2.14 - 2.38eV at temperatures from 77 to 300 K in Zn{sub 0.6}Cd{sub 0.4}S crystals with nanoscale complexes of dye molecules and silver subnanoclusters adsorbed on their surface. The spectral characteristics of the centres involved in anti-Stokes frequency conversion indicate that this process in the crystals studied is due to sequential two-photon interband optical transitions. The absorption of a photon by a dye molecule and electron excitation transfer to an adsorbed silver subnanocluster produce a free hole in the valence band. Subsequent photoionisation of the subnanocluster produces a free electron. The last step of the anti-Stokes frequency conversion process is radiative recombination of the electron with a hole localised at an emission centre. (nonlinear-optics phenomena)

• OSTI ID: 21471334
• Journal Information: Quantum Electronics (Woodbury, N.Y.), Vol. 40, Issue 6; Other Information: DOI: 10.1070/QE2010v040n06ABEH014256; ISSN 1063-7818
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION
CONVERSION
CRYSTALS
DYES
ELECTRONS
EV RANGE
EXCITATION
HOLES
LUMINESCENCE
MOLECULES
NANOSTRUCTURES
ORGANOMETALLIC COMPOUNDS
PHOTOIONIZATION
PHOTONS
RECOMBINATION
SILVER
SURFACES
VALENCE
BOSONS
ELEMENTARY PARTICLES
ELEMENTS
EMISSION
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
FERMIONS
IONIZATION
LEPTONS
MASSLESS PARTICLES
METALS
ORGANIC COMPOUNDS
PHOTON EMISSION
SORPTION
TRANSITION ELEMENTS