High-Field Stark Effects on the Near Ultraviolet Spectrum of the Hydroxyl Radical

1971 ◽  
Vol 49 (22) ◽  
pp. 2825-2832 ◽  
Author(s):  
Ethan A. Scarl ◽  
F. W. Dalby
Keyword(s):  
Dipole Moment ◽  
Hydroxyl Radical ◽  
Electric Fields ◽  
High Field ◽  
Transition Probability ◽  
Ultraviolet Spectrum ◽  
Vibrational Transition ◽  
Near Ultraviolet ◽  
Stark Effects ◽  
Π State

Spectra due to the A2Σ+–X2Π transition of the hydroxyl radical in electric fields of over 300 000 V per cm have been obtained. The dipole moment of the A2Σ+ ν = 0 state of OH has been determined to be (1.98 ± 0.08) D. From the variation of the dipole moment with vibrational quantum number in the 2Π state, the transition probability for the pure vibrational transition ν = 1 →ν = 0 has been estimated to be A10 = 80s−1.

High Field Stark Effects in CH and NH

1974 ◽  
Vol 52 (15) ◽  
pp. 1429-1437 ◽  
Author(s):  
E. A. Scarl ◽  
F. W. Dalby
Keyword(s):  
Dipole Moment ◽  
Electric Fields ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
High Field ◽  
Dipole Moments ◽  
Optical Spectra ◽  
Vibrational States ◽  
Stark Effects

A LoSurdo discharge was used to apply electric fields of up to 290 kV/cm to a mixture of cyanogen and hydrogen, and to ammonia, permitting the observation of Stark effects in the optical spectra of the CH and NH molecules, respectively. These experiments yielded the following values of the molecular electric dipole moment in the ground vibrational states: μ(CH, A2Δ) = 0.887 ± 0.045 D, and μ(NH, X3Σ) = 1.389 ± 0.075 D. A table of experimental and theoretical dipole moments of first-row hydrides is included.

On the dipole moments of excited singlet states of carbon monoxide

1976 ◽  
Vol 54 (3) ◽  
pp. 258-261 ◽  
Author(s):  
Nina J. Fisher ◽  
F. W. Dalby
Keyword(s):  
Carbon Monoxide ◽  
Dipole Moment ◽  
Dipole Moments ◽  
Excited Singlet ◽  
Electric Dipole Moments ◽  
Upper Limit ◽  
Singlet States ◽  
Stark Effects ◽  
Excited Singlet States ◽  
Π State

The electric dipole moments of the B1Σ+, C1Σ+, and A1Π states of the CO molecule have been determined by observing Stark effects on the Ångstrom and Herzberg bands. We find the excited B and C states to have dipole moments of (1.60 ± 0.15) and (4.52 ± 0.35) D respectively. The upper limit for the dipole moment of the A1Π state is (0.15 ± 0.05) D.

Dipole Moment of CS2 in its ã3A2 State

1975 ◽  
Vol 53 (16) ◽  
pp. 1579-1586 ◽  
Author(s):  
M. Larzillière ◽  
D. A. Ramsay
Keyword(s):  
Dipole Moment ◽  
Matrix Element ◽  
Vibrational State ◽  
Stark Effect ◽  
Ultraviolet Spectrum ◽  
Lower State ◽  
Diagonal Matrix Element ◽  
Near Ultraviolet ◽  
Systematic Discrepancy ◽  
Infrared Data

The Stark effect on the [Formula: see text] system of 12C32S2 has been investigated. The most pronounced effects involve the 270,27 and 261,26 rotational levels of the 140 vibrational state and the 290,29 and 281,28 rotational levels of the 050 vibrational state. These pairs of levels are nearly degenerate and are coupled by an off-diagonal matrix element in the presence of an electric field. An analysis of the Stark shifts and the shapes of the Stark broadened lines yields[Formula: see text]Comparison of these energy separations with values calculated from measurements in the near ultraviolet spectrum and lower state term values based primarily on infrared data reveals a systematic discrepancy of 0.022 cm−1.

OPTICAL OBSERVATIONS OF THE STARK EFFECT ON OH

1965 ◽  
Vol 43 (1) ◽  
pp. 144-154 ◽  
Author(s):  
D. H. Phelps ◽  
F. W. Dalby
Keyword(s):  
Dipole Moment ◽  
Electric Fields ◽  
Ground State ◽  
Vibrational State ◽  
Stark Effect ◽  
Ultraviolet Spectrum ◽  
Optical Observations ◽  
Excited Vibrational State ◽  
Vibrational Ground State ◽  
Forbidden Transitions

The ultraviolet spectrum of the OH molecule has been obtained in electric fields up to 64 000 volts per cm. Stark line splittings, broadenings, and field-induced parity-forbidden transitions have been observed. The electric dipole moment of OH in its electronic and vibrational ground state (X2Π) has been determined to be (1.727 ± 0.02) Debyes. The dipole moment in the first excited vibrational state has been found to be about 4% lower.

scholarly journals MoS2 Based Photodetectors: A Review

Sensors ◽  
2021 ◽  
Vol 21 (8) ◽  
pp. 2758
Author(s):  
Alberto Taffelli ◽  
Sandra Dirè ◽  
Alberto Quaranta ◽  
Lucio Pancheri
Keyword(s):  
Electric Fields ◽  
Spectral Range ◽  
Performance Metrics ◽  
Transition Metal Dichalcogenides ◽  
Visible Spectral Range ◽  
Detector Performance ◽  
Strong Light ◽  
Near Ultraviolet ◽  
Passivation Layers ◽  
Low Dimensional

Photodetectors based on transition metal dichalcogenides (TMDs) have been widely reported in the literature and molybdenum disulfide (MoS2) has been the most extensively explored for photodetection applications. The properties of MoS2, such as direct band gap transition in low dimensional structures, strong light–matter interaction and good carrier mobility, combined with the possibility of fabricating thin MoS2 films, have attracted interest for this material in the field of optoelectronics. In this work, MoS2-based photodetectors are reviewed in terms of their main performance metrics, namely responsivity, detectivity, response time and dark current. Although neat MoS2-based detectors already show remarkable characteristics in the visible spectral range, MoS2 can be advantageously coupled with other materials to further improve the detector performance Nanoparticles (NPs) and quantum dots (QDs) have been exploited in combination with MoS2 to boost the response of the devices in the near ultraviolet (NUV) and infrared (IR) spectral range. Moreover, heterostructures with different materials (e.g., other TMDs, Graphene) can speed up the response of the photodetectors through the creation of built-in electric fields and the faster transport of charge carriers. Finally, in order to enhance the stability of the devices, perovskites have been exploited both as passivation layers and as electron reservoirs.

High Field Electron Drift in a-Si:H

1993 ◽  
Vol 297 ◽  
Author(s):  
Qing Gu ◽  
Eric A. Schiff ◽  
Jean Baptiste Chevrier ◽  
Bernard Equer
Keyword(s):  
Electric Fields ◽  
High Field ◽  
Drift Mobility ◽  
Time Range ◽  
Electron Drift ◽  
Parameter Change ◽  
Transient Photocurrent ◽  
Field Mobility ◽  
High Electric Fields ◽  
Electron Drift Mobility

We have measured the electron drift mobility in a-Si:H at high electric fields (E ≤ 3.6 x 105 V%cm). The a-Si:Hpin structure was prepared at Palaiseau, and incorporated a thickp+ layer to retard high field breakdown. The drift mobility was obtained from transient photocurrent measurements from 1 ns - 1 ms following a laser pulse. Mobility increases as large as a factor of 30 were observed; at 77 K the high field mobility de¬pended exponentially upon field (exp(E/Eu), where E u= 1.1 x 105 V%cm). The same field dependence was observed in the time range 10 ns – 1 μs, indicating that the dispersion parameter change with field was negligible. This latter result appears to exclude hopping in the exponential conduction bandtail as the fundamental transport mechanism in a-Si:H above 77 K; alternate models are briefly discussed.

The dipole moment of water: Stark effects in D2O and HDO

1972 ◽  
Vol 24 (4) ◽  
pp. 843-851 ◽  
Author(s):  
A.H. Brittain ◽  
A.P. Cox ◽  
G. Duxbury ◽  
T.G. Hersey ◽  
R.G. Jones
Keyword(s):  
Dipole Moment ◽  
Stark Effects

scholarly journals Reducing dielectric loss and enhancing electrical insulation for multilayer polymer films by nanoconfined ion transport under high poling electric fields

2020 ◽  
Vol 8 (18) ◽  
pp. 6102-6117 ◽  
Author(s):  
Xinyue Chen ◽  
Elshad Allahyarov ◽  
Deepak Langhe ◽  
Michael Ponting ◽  
Ruipeng Li ◽  
...  
Keyword(s):  
Electric Fields ◽  
Polymer Films ◽  
High Field ◽  
Ionic Conduction ◽  
Electric Energy ◽  
Electric Energy Storage ◽  
Conduction Loss ◽  
Impurity Ions ◽  
Energy Storage Applications ◽  
Dielectric Insulation

High-field electric poling locks impurity ions at interfaces in multilayer polymer films, which enhances dielectric insulation and reduces ionic conduction loss for electric energy storage applications.

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