Quantum box

Gayral, B., Gerard, J.M., Lemaitre, A., Dupuis, C., Manin, L., and Pelouard, J.L., 1999, High-Q wet-etched GaAs microdisks containing InAs quantum boxes, Appl. Phys. Lett. 75(13) 1908-1910. 

Figure 17.1. (a) Quantum wells, (b) quantum wires, (c) ordered arrays of quantum boxes, (d) random quantum dots, and (e) an aggregate of nanometer-size grains. 

Then, why do Nichia s GaN lasers work at all The answer lies with two other serious non-uniformities present in the laser (1) an accidental non-uniformity within the quantum well due to spinodal decomposition [7], and (2) the intentional use of quantum wells and heterostructures to define sheets of high population inversion and photon confinement. The former effect creates a granulated, random array of InN-rich quantum boxes within the intended quantum well volume, which confine the population inversion within these nanoscopic regions of high optical quality. While the random... 

Superlattice and low-dimensional physics are some of the most interesting subjects in solid-state physics. A challenging problem in this field is the formation of quantum wire and quantum box structures by using ultra-high technology such as MBE, MOCVD (metallorganic chemical vapor deposition), and related frontier microprocessing. However, this problem has not yet been solved. Poly silane is probably a perfect quantum wire in itself The absorption spectrum of polysilane clearly shows the characteristics of a one-dimensional quantum wire. Even a quantum box or a one-dimensional superlattice can be formed by chemical polymerization, which may be the simplest way. 

F centers can act as nanocatalysts, however few reactions are catalyzed by oxygen vacancies because only two confined electrons at the same energy level are present. In order to change these two parameters (number of confined electrons and energy levels) without modifying the size of the quantum box, the F center can be decorated with metal atoms to produce a third kind of nanocatalyst supported atoms on oxide surfaces. 

BenistyH., Sotomayor-Torres C. M. and Weisbuch C. (1991), Intrinsic mechanism for the poor luminescence properties of quantum-box systems , Phys. Rev. B 44, 10945-10948. 

BenistyH. (1995), Reduced electron-phonon relaxation rates in quantum-box systems theoretical analysis , Phys. Rev. B 51, 13281-13293. 

G. Hodes, A. Albu-Yaron, Optical, Structural and Photoelectrochemical Properties of Quantum Box Semiconductor Films, Proc. Electrochem. Soc. 1988, 88-14, Vol. 298. 

The average size of the pillar structures was reduced from 60-50 to 30-40 nm when the doping density of the substrate increased from = 10 cm to 10 cm (Fig. 29) [230], Quantum-wire and quantum-box structures with low-size fluctuations were obtained. 

Figure 3-46. Explanation of the phase coupling problem between macro and micro frequencies. A doubling of the ground state fir uency from Vd m cro leads to an exdted state (vc) where single electrons can tunnel through the ligand shells. The macroscopic frequency Vd macro coupled with the intraduster microscopic frequency Vp micn> simply by the diameter of the quantum box. The same is valid for vc acio The v-r— is in the...

According to the QC theory, the potential barrier of the surface confines electrons in the conduction band and holes in the valence band. Alternatively, the potential well of the quantum box entraps them moving inside. Because of the confinement, optical transition energy of electrons and holes between the valence and the conduction band increases, with enlarges effectively the Eq. The sum of kinetic and potential energy of the freely moving carriers is responsible for the Eq expansion, and therefore, the width of the confined Eq grows as the characteristic dimensions of the crystallite decrease [34]. 

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