GaN/AlN constant total effective radius multi-wells quantum rings: Physical properties under well number variation effects

Solaimani, M.

doi:10.1016/j.ssc.2014.09.019

Cited by 21 publications

(7 citation statements)

References 27 publications

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“…In this way, the smaller nanodevice sizes in addition to better physical properties are accessible. So far, we have studied the optical properties of constant total effective length multiple quantum well systems, [25] the physical properties of GaN/AIN constant total effective radius multi-well quantum rings under well number variation effects, [26] and the optical properties of two-electron [27] and impurity including [28] GaN/AlN constant total effective radius multi-shell quantum rings and dots. And we also have studied the miniband formation scenario in GaN/AlN constant total effective length multiple quantum dots.…”

Section: Introductionmentioning

confidence: 99%

Shannon information entropies for rectangular multiple quantum well systems with constant total lengths*

2018

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We first study the Shannon information entropies of constant total length multiple quantum well systems and then explore the effects of the number of wells and confining potential depth on position and momentum information entropy density as well as the corresponding Shannon entropy. We find that for small full width at half maximum (FWHM) of the position entropy density, the FWHM of the momentum entropy density is large and vice versa. By increasing the confined potential depth, the FWHM of the position entropy density decreases while the FWHM of the momentum entropy density increases. By increasing the potential depth, the frequency of the position entropy density oscillation within the quantum barrier decreases while that of the position entropy density oscillation within the quantum well increases. By increasing the number of wells, the frequency of the position entropy density oscillation decreases inside the barriers while it increases inside the quantum well. As an example, we might localize the ground state as well as the position entropy densities of the 1st, 2nd, and 6th excited states for a four-well quantum system. Also, we verify the Bialynicki–Birula–Mycieslki (BBM) inequality.

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Section: Introductionmentioning

confidence: 99%

Shannon information entropies for rectangular multiple quantum well systems with constant total lengths*

2018

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“…One of the important factors in both the electronic and optical properties of MSQDs is the number of wells in the structure. When the literature is examined, it is seen that the effect of the number of wells in multiple quantum wells have been widely investigated [25][26][27][28][29][30][31]. However, there are very few reports on MSQD [32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Effect of number of well and core radius on the binding energy and optical properties of multishell spherical quantum dot with parabolic potential

Kirak

2023

Phys. Scr.

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In the current study, the probability densities and binding energy of the ground state and first excited sate in multishell quantum dot with parabolic confinement potential have been examined. Also, the effects of core radius, the number of well in structure and the presence of impurity on the total optical absorption coefficient have been investigated. The finite difference method has been used to obtain the energy levels and related wave functions of the system within framework effective mass approximation. The results obtained reveal that the number of well, especially the first five values, have a considerable impact on the critical core values of binding energy. It is found that the presence of impurity and the number of wells cause a blue shift in the peak positions of total absorption coefficients. Moreover, our results show that these factors have an important effect on the magnitude of optical properties.

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“…Among them transport properties in quantum ring under effect of spin orbit interaction [28][29], Fano effect, Aharonov-Bohm effects and persistent currents [30][31][32] are some of interesting studies. In our earlier works, we have studied the optical properties of clean [33] , two-electron [34], three electrons [35] and impurity included [36] quantum rings and dots through compact density matrix formalism in the effective mass envelop function approach. Then, by using a onedimensional tight-binding (1D-TB) model we studied the optical properties quantum rings, as a proposal, to be used in THz detection quantum devices [37].…”

Section: Introductionmentioning

confidence: 99%

Spectral tuning in quantum rings by magnetic field: detection from NIR to FIR regime

Solaimani

Mobini

2022

Opt Quant Electron

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In this work, we present a quantum ring structure based on semiconducting QWs for spectral tuning in a wide IR range (1.24-103 µm) using an external magnetic field. We have used a tight binding method to investigate the optical properties of the structure. Using this method the effect of the external magnetic field on the absorption spectrum has been investigated as the post-processing method. Also, the effect of different geometrical parameters like the number of QWs, QR radius, and constructed material considered as processing methods for tuning absorption. The results show for GaAs based QR with the radius of 100/π consist of 4 QWs, absorption peak linearly increase from 100 meV (12.4 um) in LWIR regime and shift to 200 meV (6.2 um) in MIR regime with increasing external magnetic field. Also for a QR with a radius of 200/π, by changing the magnetic field different absorption peaks appear and disappear in an absorption spectrum and a multi-color detector converts to single-detector in the NIR regime. This results help experimentalist to select proper materials with optimized geometrical parameters to achieve desired wavelength for various detection applications.

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GaN/AlN constant total effective radius multi-wells quantum rings: Physical properties under well number variation effects

Cited by 21 publications

References 27 publications

Shannon information entropies for rectangular multiple quantum well systems with constant total lengths*

Shannon information entropies for rectangular multiple quantum well systems with constant total lengths*

Effect of number of well and core radius on the binding energy and optical properties of multishell spherical quantum dot with parabolic potential

Spectral tuning in quantum rings by magnetic field: detection from NIR to FIR regime

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