Strong Photon-Exciton Coupling in the Near-Field Luminescence of Semiconductor Quantum Dots

2000 ◽  
Vol 618 ◽  
Author(s):  
A. M. Mintairov ◽  
A. S. Vlasov ◽  
J. L. Merz ◽  
O. V. Kovalenkov ◽  
J. P. Reynolds ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Near Field ◽  
Strong Increase ◽  
Field Region ◽  
Exciton Coupling ◽  
Surface Distance ◽  
Self Organized ◽  
Scanning Optical Microscopy ◽  
Near Field Scanning ◽  
Inp Quantum Dots

ABSTRACTWe present low-temperature near-field scanning optical microscopy (NSOM) measurements of self-organized InP quantum dots (QD) embedded in a GaInP layer. We observed an anomalously strong increase in the emission energy (∼270 meV) of a single QD by changing the tip-to-surface distance over ∼100 nm in the near-field region. The effect indicates the formation of a near-field nanocavity having extremely high photon-exciton mixing and can be interpreted as the observation of the coupled photon-exciton pair

Near-Field Magneto-Photoluminescence of Singe Self-Organized Quantum Dots.

2003 ◽  
Vol 794 ◽  
Author(s):  
A. M. Mintairov ◽  
A. S. Vlasov ◽  
J. L. Merz
Keyword(s):  
Quantum Dots ◽  
Near Field ◽  
Energy Shift ◽  
Zeeman Splitting ◽  
Negative Energy ◽  
Zero Magnetic Field ◽  
Bimodal Size Distribution ◽  
Self Organized ◽  
Scanning Optical Microscopy ◽  
Near Field Scanning

ABSTRACTWe present results obtained using low temperature near-field scanning optical microscopy for the measurements of Zeeman splitting and the diamagnetic shift of single self-organized InAs/AlAs, InAs/GaAs and InP/GaInP quantum dots. The measurements allow us to relate the bimodal size distribution of InAs dots with variations in In content. For single InP QDs we observed a strong circular polarization at zero magnetic field accompanied with a negative energy shift, suggesting that strong internal magnetic fields exist in these QDs.

Near-Field Magneto-Photoluminescence of Singe Self-Organized Quantum Dots.

2003 ◽  
Vol 799 ◽  
Author(s):  
A. M. Mintairov ◽  
A. S. Vlasov ◽  
J. L. Merz
Keyword(s):  
Quantum Dots ◽  
Near Field ◽  
Energy Shift ◽  
Zeeman Splitting ◽  
Negative Energy ◽  
Zero Magnetic Field ◽  
Bimodal Size Distribution ◽  
Self Organized ◽  
Scanning Optical Microscopy ◽  
Near Field Scanning

ABSTRACTWe present results obtained using low temperature near-field scanning optical microscopy for the measurements of Zeeman splitting and the diamagnetic shift of single self-organized InAs/AlAs, InAs/GaAs and InP/GaInP quantum dots. The measurements allow us to relate the bimodal size distribution of InAs dots with variations in In content. For single InP QDs we observed a strong circular polarization at zero magnetic field accompanied with a negative energy shift, suggesting that strong internal magnetic fields exist in these QDs.

Near-Field Magneto-Photoluminescence of Singe Self-Organized Quantum Dots.

2003 ◽  
Vol 789 ◽  
Author(s):  
A. M. Mintairov ◽  
A. S. Vlasov ◽  
J. L. Merz
Keyword(s):  
Quantum Dots ◽  
Near Field ◽  
Energy Shift ◽  
Zeeman Splitting ◽  
Negative Energy ◽  
Zero Magnetic Field ◽  
Bimodal Size Distribution ◽  
Self Organized ◽  
Scanning Optical Microscopy ◽  
Near Field Scanning

ABSTRACTWe present results obtained using low temperature near-field scanning optical microscopy for the measurements of Zeeman splitting and the diamagnetic shift of single self-organized InAs/AlAs, InAs/GaAs and InP/GaInP quantum dots. The measurements allow us to relate the bimodal size distribution of InAs dots with variations in In content. For single InP QDs we observed a strong circular polarization at zero magnetic field accompanied with a negative energy shift, suggesting that strong internal magnetic fields exist in these QDs.

scholarly journals Wigner localization and whispering gallery modes of electrons in quantum dots

2018 ◽  
Vol 52 (4) ◽  
pp. 478
Author(s):  
A.M. Mintairov ◽  
J.L. Merz ◽  
J. Kapaldo ◽  
A.S. Vlasov ◽  
S.A. Blundell
Keyword(s):  
Quantum Confinement ◽  
Near Field ◽  
Emission Spectra ◽  
Whispering Gallery Modes ◽  
Image Size ◽  
Whispering Gallery ◽  
Self Organized ◽  
Electrostatic Control ◽  
Scanning Optical Microscopy ◽  
Near Field Scanning

AbstractWe used a low temperature near-field scanning optical microscopy (NSOM) to study a formation of Wigner molecules (WMs) in the emission spectra of self-organized InP/GaInP QDs having up to seven electrons. We used a Schottky diode structure for the electrostatic control of the number of the electrons ( N ) in QD, and we observed the emission of the charged excitons (for N < 3) and of the WMs (for N > 2) in the regime of weak Wigner localization. We show, that a contribution of whispering gallery modes (WGMs) of the electrons and rearrangement of the electrons between the WM and WGM states in the QDs, can explain the anomalous dependence of NSOM image size on the quantum confinement observed for some dots.

Enhanced Emission from Single Isolated Gold Quantum Dots Investigated Using Two-Photon-Excited Fluorescence Near-Field Scanning Optical Microscopy

2016 ◽  
Vol 138 (50) ◽  
pp. 16299-16307 ◽  
Author(s):  
Neranga Abeyasinghe ◽  
Santosh Kumar ◽  
Kai Sun ◽  
John F. Mansfield ◽  
Rongchao Jin ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Microscopy ◽  
Near Field ◽  
Two Photon ◽  
Scanning Optical Microscopy ◽  
Near Field Scanning

Near-field scanning optical microscopy

1986 ◽  
Vol 44 ◽  
pp. 642-643
Author(s):  
E. Betzig ◽  
A. Harootunian ◽  
M. Isaacson ◽  
A. Lewis
Keyword(s):  
Near Field ◽  
Optical Microscope ◽  
Visible Radiation ◽  
Field Methods ◽  
Optical Elements ◽  
Optical Region ◽  
Order Of Magnitude ◽  
Nondestructive Imaging ◽  
Scanning Optical Microscopy ◽  
Near Field Scanning

In general, conventional methods of optical imaging are limited in spatial resolution by either the wavelength of the radiation used or by the aberrations of the optical elements. This is true whether one uses a scanning probe or a fixed beam method. The reason for the wavelength limit of resolution is due to the far field methods of producing or detecting the radiation. If one resorts to restricting our probes to the near field optical region, then the possibility exists of obtaining spatial resolutions more than an order of magnitude smaller than the optical wavelength of the radiation used. In this paper, we will describe the principles underlying such "near field" imaging and present some preliminary results from a near field scanning optical microscope (NS0M) that uses visible radiation and is capable of resolutions comparable to an SEM. The advantage of such a technique is the possibility of completely nondestructive imaging in air at spatial resolutions of about 50nm.

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