Stark effect

About: Stark effect is a research topic. Over the lifetime, 9240 publications have been published within this topic receiving 189278 citations. The topic is also known as: Stark–Lo Surdo effect.

Dielectrics and Waves

Abstract: Macroscopic approach complex permittivity and permaebility polarization and magnetization couloumb and dipole fields space-charge fields correlations between electric and magnetic phenomena Maxwell's field equations electromagnetic waves in unbounded space descriptions of dielectrics by various sets of parameters forces field energy and radiation polarized radiation dipole radiation boundary conditions Fresnel's equations reflection and refraction of plane waves by loss-free dielectrics standing waves interference optics skin effect reflection and refraction by media with loss guided waves electromagnetic fields in waveguides measurement of dielectrics in shorted waveguides short-circuited guides and cavity resonators treatment of field phenomena by equivalent circuits representation of dielectrics by lumped circuit equivalents molecular approach-survey molecular mechanisms of polarization the Clausius-Mosotti-Lorens equation electronic polarization anomalous dispersion and resonance absorbtion electromagnetic radiation Bohr's quantum theory wave mechanics structure of atoms Stark effect Zeeman effect the energy level diagram of atoms dispersion formula of quantum mechanics the formulation of molucules wave functions of molecules and the concept of quantum mechanical resonance bond energies and dipole moments of diatomic molecules static dielectric constants and dipole moments of polar gases polyatomic molecules vibration and rotation electronic, atomic and orientation polarization of gas molecules band width of spectral lines microwave sperctroscopy pressure broadening and Debye's realization equation the Mosotti catastrophe and the local field formation and structure of liquids and solids models for the discussion of orientation polarization in liquids and solids piezoelectricity dipole moments - piezoelectricity and crystal structure ferroelectricity paramagnetism and ferromagnetism ferromagnetic metals and semiconductors interfacial and space-charge polarization conduction and breakdown.

Optical detection and spectroscopy of single molecules in a solid

Abstract: Using two different double-modulation techniques, we have observed the optical-absorption spectrum of single dopant molecules of pentacene in a p-terphenyl host crystal at liquid-helium temperatures. To achieve this, frequency-modulation spectroscopy was combined either with Stark or ultrasonic modulation to remove interfering background signals from residual amplitude modulation, and the number of molecules in resonance was reduced to one by operating in the wings of the inhomogeneous line. Triplet bottleneck saturation appears to be suppressed in the single-molecule regime.

Quantum-Confined Stark Effect due to Piezoelectric Fields in GaInN Strained Quantum Wells

Abstract: We have studied the influence of piezoelectric fields on luminescence properties of GaInN strained quantum wells. Our calculation suggests that an electric field of 1.08 MV/cm is induced by the piezoelectric effect in strained Ga0.87In0.13N grown on GaN. The photoluminescence peak energy of the Ga0.87In0.13N strained quantum wells showed blue shift with increasing excitation intensity. Moreover, the well-width dependence of its luminescence peak energy was well explained when the piezoelectric fields were taken into account. These results clearly showed that the piezoelectric field induced the quantum-confined Stark effect.

Spontaneous emission of localized excitons in InGaN single and multiquantum well structures

Abstract: Emission mechanisms of InGaN single quantum well blue and green light emitting diodes and multiquantum well structures were investigated by means of modulation spectroscopy. Their static electroluminescence (EL) peak was assigned to the recombination of excitons localized at certain potential minima in the quantum well. The blueshift of the EL peak caused by the increase of the driving current was explained by combined effects of the quantum‐confinement Stark effect and band filling of the localized states by excitons.

Quantum crystallites and nonlinear optics

Abstract: This is a review and analysis of the optical properties of quantum crystallites, with principal emphasis on the electro-optic Stark effect and all optical third order nonlinearity. There are also introductory discussions on physical size regimes, crystallite synthesis, quantum confinement theory, and linear optical properties. The experiments describe CdSe crystallites, exhibiting strong confinement of electrons and holes, and CuCl crystallites, exhibiting weak confinement of the exciton center of mass. In the CdSe system, neither the Stark effect nor the third order nonlinearity is well understood. The Stark shifts appear to be smaller than calculated, and field inducted broadening also occurs. The third order nonlinearity is only modestly stronger than in bulk material, despite theoretical prediction. Unexpectedly large homogeneous widths, due to surface carrier trapping, in the nominally discrete crystallite excited states appear to be involved. The CuCl system shows far narrower spectroscopic homogeneous widths, and corresponds more closely to an ideal quantum dot in the weak confinement limit. CuCl also exhibits exciton superradiance at low temperature. Surface chemistry and crystallite encapsulation are critical in achieving the predicted large Stark and third order optical effects in II-VI and III-V crystallites.