Silicon quantum dots in microdisk resonators: whispering-gallery modes, stress-induced Q-factor tuning and enhancement

2009 ◽  
Author(s):  
G. Pucker ◽  
M. Ghulinyan ◽  
A. Pitanti ◽  
M. Xie ◽  
D. Navarro-Urrios ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Whispering Gallery Modes ◽  
Q Factor ◽  
Silicon Quantum Dots ◽  
Whispering Gallery ◽  
Microdisk Resonators

scholarly journals Q-factor limits for far-field detection of whispering gallery modes in active microspheres

2015 ◽  
Vol 23 (22) ◽  
pp. 28896 ◽  
Author(s):  
Nicolas Riesen ◽  
Tess Reynolds ◽  
Alexandre François ◽  
Matthew R. Henderson ◽  
Tanya M. Monro
Keyword(s):  
Whispering Gallery Modes ◽  
Far Field ◽  
Q Factor ◽  
Field Detection ◽  
Whispering Gallery

Wigner Localization and Whispering Gallery Modes of Electrons in Quantum Dots

2018 ◽  
Vol 52 (4) ◽  
pp. 502-506 ◽  
Author(s):  
A. M. Mintairov ◽  
J. L. Merz ◽  
J. Kapaldo ◽  
A. S. Vlasov ◽  
S. A. Blundell
Keyword(s):  
Quantum Dots ◽  
Whispering Gallery Modes ◽  
Whispering Gallery

scholarly journals Single-atom detection using whispering-gallery modes of microdisk resonators

2004 ◽  
Vol 70 (5) ◽  
Author(s):  
Michael Rosenblit ◽  
Peter Horak ◽  
Steve Helsby ◽  
Ron Folman
Keyword(s):  
Whispering Gallery Modes ◽  
Single Atom ◽  
Whispering Gallery ◽  
Microdisk Resonators ◽  
Atom Detection

scholarly journals Coexistence of electron whispering-gallery modes and atomic collapse states in graphene/WSe2 heterostructure quantum dots

2021 ◽  
Author(s):  
Qi Zheng ◽  
Yu-Chen Zhuang ◽  
Qingfeng Sun ◽  
Lin He
Keyword(s):  
Quantum Dots ◽  
Graphene Quantum Dots ◽  
Whispering Gallery Modes ◽  
Fermi Velocity ◽  
Dirac Fermions ◽  
Heavy Nuclei ◽  
Whispering Gallery ◽  
Klein Tunneling ◽  
Collapse State ◽  
A Charge

Abstract The relativistic massless charge carriers with a Fermi velocity of about c/300 in graphene enable us to realize two distinct types of resonances (c, the speed of light in vacuum). One is electron whispering-gallery mode in graphene quantum dots arising from the Klein tunneling of the massless Dirac fermions. The other is atomic collapse state, which has never been observed in experiment with real atoms due to the difficulty of producing heavy nuclei with charge Z > 170, however, can be realized near a Coulomb impurity in graphene with a charge Z ≥ 1 because of the “small” velocity of the Dirac excitations. Here, unexpectedly, we demonstrate that both the electron whispering-gallery modes and atomic collapse states coexist in graphene/WSe2 heterostructure quantum dots due to the Coulomb-like potential near their edges. By applying a perpendicular magnetic field, evolution from the atomic collapse states to unusual Landau levels in the collapse regime are explored for the first time.

Increasing the Q-factor of thin planar dielectric resonator with whispering gallery modes

2020 ◽  
Vol 12 (10) ◽  
pp. 960-968
Author(s):  
A. E. Kogut ◽  
M. T. Islam ◽  
E. A. Kogut ◽  
Z. E. Eremenko ◽  
R. S. Dolia
Keyword(s):  
Dielectric Resonator ◽  
Dielectric Waveguide ◽  
Air Gap ◽  
Whispering Gallery Modes ◽  
Dielectric Resonators ◽  
Q Factor ◽  
Energy Characteristics ◽  
Excitation Efficiency ◽  
Whispering Gallery ◽  
Dielectric Disk

AbstractThe spectral and energy characteristics of the tunable thin planar dielectric resonator with the movable metal mirror are researched. It is found that the high-Q HE-polarized whispering gallery modes (WGMs) are effectively excited in such a resonator by the dielectric waveguide. A mode set of the tunable thin planar dielectric resonator depends on the presence of an air gap in its design. Changing the height of the air gap affects the energy characteristics of the tunable thin planar dielectric resonators (DR). Shifting the resonant fields of WGMs from the dielectric disk to the air gap is the reason for this effect. It is shown that at certain heights of the air gap, increasing the unloaded Q-factor of the tunable thin planar DR and improving the excitation efficiency of WGMs in it is achieved.

Large spontaneous emission enhancement in InAs quantum dots coupled to microdisk whispering gallery modes

2003 ◽  
Vol 238 (2) ◽  
pp. 309-312 ◽  
Author(s):  
G. S. Solomon ◽  
Z. Xie ◽  
W. Fang ◽  
J. Y. Xu ◽  
A. Yamilov ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Spontaneous Emission ◽  
Whispering Gallery Modes ◽  
Inas Quantum Dots ◽  
Whispering Gallery ◽  
Emission Enhancement
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