Theory of line widths for optical transitions from impurity levels to Landau levels

1966 ◽  
Vol 5 (4) ◽  
pp. 341-345
Author(s):  
V. A. Kovarskii ◽  
I. A. Chaikovskii
Keyword(s):  
Landau Levels ◽  
Optical Transitions ◽  
Line Widths

CRDS study of auto-ionizing Rydberg states of argon in a microwave discharge This article is part of a Special Issue on Spectroscopy at the University of New Brunswick in honour of Colan Linton and Ron Lees.

2009 ◽  
Vol 87 (5) ◽  
pp. 575-581 ◽  
Author(s):  
B. M. van der Ende ◽  
C. Winslade ◽  
R. L. Brooks ◽  
R. H. deLaat ◽  
N. P.C. Westwood
Keyword(s):  
New Brunswick ◽  
Excited States ◽  
Microwave Discharge ◽  
Rydberg States ◽  
Spectral Lines ◽  
Optical Transitions ◽  
Single Source ◽  
Special Issue ◽  
Line Widths ◽  
The University

Optical transitions from two microwave discharge excited states of argon have been observed using cavity ring-down spectroscopy. These transitions originate on the high-lying levels, 3d[1/2] 1° and 3d[3/2] 2° , and terminate on the nf ′[5/2] Rydberg (n = 8 to 22) levels, which, except for n = 8, lie between the 2P3/2 and 2P1/2 ionization thresholds. In total, 24 such spectral lines have been observed. The quantum defect for the f ′ series has been measured and is compared to previously measured values. We observe a nearly threefold jump in line width in going from n = 8 to n = 9, below and above the 2P3/2 threshold, respectively. The line widths are broad and increase monotonically with n (above 9), in contrast to the narrowing of line widths usually observed. We cannot attribute this to a single source but conclude that collisional, quasielastic l-mixing of the nf ′[5/2] Rydberg states plays a significant role.

MAGNETO-SPECTROSCOPY OF EPITAXIAL GRAPHENE

2007 ◽  
Vol 21 (08n09) ◽  
pp. 1145-1154 ◽  
Author(s):  
M. L. SADOWSKI ◽  
G. MARTINEZ ◽  
M. POTEMSKI ◽  
C. BERGER ◽  
W. A. DE HEER
Keyword(s):  
Magnetic Field ◽  
Cyclotron Resonance ◽  
Far Infrared ◽  
Theoretical Models ◽  
Epitaxial Graphene ◽  
Landau Levels ◽  
Perpendicular Magnetic Field ◽  
Dirac Fermions ◽  
Optical Transitions ◽  
Interband Transitions

We present a far infrared investigation of the optical transitions in epitaxial graphene subjected to a perpendicular magnetic field. Cyclotron-resonance-like transitions between adjacent electron Landau levels are observed, as well as interband transitions. The results are discussed in terms of existing theoretical models of Dirac fermions in graphene, and the relevant optical selection rules.

Radiative Recombination Mechanisms in Porous Silicon

1991 ◽  
Vol 256 ◽  
Author(s):  
S. Gardelis ◽  
B. Hamilton ◽  
R. A. Kubiak ◽  
T. E Whall ◽  
E. C. H. Parker
Keyword(s):  
Thermal Stability ◽  
Porous Silicon ◽  
Thermal Behaviour ◽  
Radiative Recombination ◽  
Random Potential ◽  
Optical Transitions ◽  
Transition Energies ◽  
Material Systems ◽  
Spectral Behaviour ◽  
Line Widths

ABSTRACTThis paper attempts to address the question of the role played by dimensionality in the observed optical transitions of porus silicon and related material systems. The effect of the degree of porosity on the transition energies, line widths and thermal stability. In addition more subtle effects observed in the thermal behaviour of the spectra which may relate to carrier trapping in a random potential of an imperfect localised system are reported. Comparisons with the spectral behaviour which would be predicted by quantum scale confinement of electronic particles are made.

scholarly journals Many-particle effects in optical transitions from zero-mode Landau levels in HgTe quantum wells

2020 ◽  
Vol 102 (4) ◽  
Author(s):  
S. S. Krishtopenko ◽  
A. M. Kadykov ◽  
S. Gebert ◽  
S. Ruffenach ◽  
C. Consejo ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Zero Mode ◽  
Landau Levels ◽  
Optical Transitions

scholarly journals Optical transitions between Landau levels: AA-stacked bilayer graphene

2010 ◽  
Vol 97 (10) ◽  
pp. 101905 ◽  
Author(s):  
Yen-Hung Ho ◽  
Jhao-Ying Wu ◽  
Rong-Bin Chen ◽  
Yu-Huang Chiu ◽  
Ming-Fa Lin
Keyword(s):  
Bilayer Graphene ◽  
Landau Levels ◽  
Optical Transitions

Chern-Simons theory for electrons in high Landau levels

1999 ◽  
Vol 09 (PR10) ◽  
pp. Pr10-223-Pr10-225
Author(s):  
S. Scheidl ◽  
B. Rosenow
Keyword(s):  
Landau Levels ◽  
Simons Theory ◽  
Chern Simons ◽  
Chern Simons Theory
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