Spin-polarized PL and Raman Spectroscopy of Nanocrystal Quantum Dots in High Magnetic Fields

2005 ◽  
Author(s):  
M. Furis
Keyword(s):  
Quantum Dots ◽  
Raman Spectroscopy ◽  
Magnetic Fields ◽  
High Magnetic Fields ◽  
Spin Polarized ◽  
Nanocrystal Quantum Dots

scholarly journals Time- and Polarization-Resolved Optical Spectroscopy of Colloidal CdSe Nanocrystal Quantum Dots in High Magnetic Fields

2005 ◽  
Vol 109 (32) ◽  
pp. 15332-15338 ◽  
Author(s):  
Madalina Furis ◽  
Jennifer A. Hollingsworth ◽  
Victor I. Klimov ◽  
Scott A. Crooker
Keyword(s):  
Quantum Dots ◽  
Magnetic Fields ◽  
Optical Spectroscopy ◽  
High Magnetic Fields ◽  
Nanocrystal Quantum Dots

scholarly journals Exciton lifetimes of CdTe nanocrystal quantum dots in high magnetic fields

2011 ◽  
Vol 83 (3) ◽  
Author(s):  
J. H. Blokland ◽  
V. I. Claessen ◽  
F. J. P. Wijnen ◽  
E. Groeneveld ◽  
C. de Mello Donegá ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Magnetic Fields ◽  
High Magnetic Fields ◽  
Cdte Nanocrystal ◽  
Nanocrystal Quantum Dots

EXCITON SPIN STATES IN NANOCRYSTAL QUANTUM DOTS REVEALED BY SPIN-POLARIZED RESONANT PHOTOLUMINESCENCE AND RAMAN SPECTROSCOPY

2004 ◽  
Vol 18 (27n29) ◽  
pp. 3769-3774 ◽  
Author(s):  
MADALINA FURIS ◽  
TODD BARRICK ◽  
PATRICK ROBBINS ◽  
SCOTT A. CROOKER ◽  
MELISSA PETRUSKA ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Quantum Dots ◽  
Magnetic Fields ◽  
High Field ◽  
Polarized Light ◽  
Zero Magnetic Field ◽  
Spin States ◽  
Circularly Polarized Light ◽  
Spin Polarized ◽  
Nanocrystal Quantum Dots

We performed spin-polarized resonant Raman and resonant photoluminescence excitation spectroscopy (also known as "fluorescence line narrowing") on ZnS -capped CdSe nanocrystal quantum dots in high magnetic fields to 33 Tesla and temperatures down to 1.7K, which allows detailed investigation of the excitonic spin states. In these experiments, spin-polarized electrons and holes are resonantly injected by circularly polarized light into colloidal quantum dots of specific size, using a narrowband tunable dye laser and a fiber-coupled probe that is specially-designed for use in high-field magnets. In addition to the expected broad features associated with excitonic recombination and Raman-like peaks associated with quantized acoustic phonons, the photoluminescence spectra measured at magnetic fields larger than 10 Tesla develop a sharp peak, which moves roughly linearly with applied magnetic field. Further, the energy of this high-field peak varies systematically as a function of nanocrystal size. However, unlike typical electron spin flip transitions, the mode energy extrapolates to a finite value at zero magnetic field, suggesting the existence of an additional size-dependent exchange mechanism.

Maximum-Density Droplet and Charge Redistributions in Quantum Dots at High Magnetic Fields

1999 ◽  
Vol 82 (14) ◽  
pp. 2931-2934 ◽  
Author(s):  
T. H. Oosterkamp ◽  
J. W. Janssen ◽  
L. P. Kouwenhoven ◽  
D. G. Austing ◽  
T. Honda ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Magnetic Fields ◽  
Maximum Density ◽  
High Magnetic Fields
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