Binding energy of donor impurities in double inverse parabolic quantum well under electric field

Kasapoğlu, E.

doi:10.1016/j.physe.2009.02.003

Cited by 15 publications

(5 citation statements)

References 24 publications

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“…[20][21][22][23] Under these external effects, it is possible to find many studies in which binding energy (E b ) and self-polarization (SP/e) calculations are made for the confinement electron, especially in QW1-doped semiconductors. [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43] Recently, the SP/e, which is defined as the influence of the well potential on the impurity atom has been studied for QW1 as a function of well width, external electric field, and the impurity position. In our previous studies, we have studied SP/e in QW1 under the laser field.…”

Section: Introductionmentioning

confidence: 99%

Self‐Polarization of Hydrogenic Impurity in Quantum Wells Made of Different Materials

Özkapı

Mese²,

Cicek³

et al. 2022

Physica Status Solidi (b)

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The effect of the external electric field on the ground state binding energy and self‐polarization of a hydrogenic donor impurity in quantum wells (QWs) made of different materials is calculated within the effective mass approximation using a variational scheme. The variations of binding energy and self‐polarization depending on well width, electric field, and impurity position have been studied in detail. For each QW made of different materials, it has been observed that the binding energy decreases with the increase of the electric field, whereas the self‐polarization increases. Also, it has been observed that InP/In1−x Ga x P has higher binding energy values among the structures discussed. It is seen that material selection has a noticeable effect on self‐polarization and binding energy in QW‐based structures.

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Section: Introductionmentioning

confidence: 99%

Self‐Polarization of Hydrogenic Impurity in Quantum Wells Made of Different Materials

Özkapı

Mese²,

Cicek³

et al. 2022

Physica Status Solidi (b)

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“…double inverse parabolic quantum well [24]. They indicated that by changing the Al concentrations in the center of the wells, the electric field and the geometric parameters of the well, absorption peak position could be tuning.…”

Section: Kasapoglu Et Al Investigated the Effects Of The Geometrical ...mentioning

confidence: 99%

“…In recent decades, multiple quantum wells have been investigated due to their potential applications (e.g., photo-detectors, high-speed absorption modulators, electro optical switches, and terahertz oscillators) [24]. Technological applications of multiple quantum wells depend on their optical and transportation properties that related to the quantum well specification [25].…”

Section: Introductionmentioning

confidence: 99%

Optimization of terahertz absorption in periodic quantum well structures

Javidi

Hosseini

Karimi

2020

Optik

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In this work, the linear absorption spectra for periodic arrays of GaAs-GaAsAl quantum wells with different thicknesses, inside electromagnetic wave has been studied.The eigen energies and eigen functions are calculated by solving the Schrödinger equation numerically. The absorption spectra are obtained using the density matrix approach and the effects of quantum well parameters have been studied. Results show that for a wide range of parameters the absorption peaks lie in the terahertz region. Furthermore, it is possible to adjust the frequency of absorption peak in the terahertz range by changing the width and height of the wells or array numbers that could be used in terahertz devices. PACS numbers: 73.21.Fg, 74.25.Gz Keywords: Double quantum wells, Optical absorption, Triple quantum wells. of electronic devices, optoelectronics, semiconductor lasers, infrared detectors, the study of the external factors on the optical properties of QWs systems is important [7-9].So far, many studies have been carried out to find the linear and nonlinear absorption coefficients of QWs with different shapes [10][11][12][13]. The results of these works show that the absorption coefficients can be very sensitive to various parameters such as applied electric and magnetic fields, incident optical intensity, and the shapes of QWs [12,14]. On the other hand, the terahertz absorber due to its wide applications and also lack of proper high-performance chips has been heavily investigated by scientists in recent years [15][16][17][18]. Usually, the frequency between 0.3 and 30 THz is called the terahertz range [18,19]. Today's, terahertz technology is driven by scientific and industrial applications in areas such as information and communications technology [17], biology and medical science [21], security check and inspection, quality control in production and packaging, detectors, and so on [16][17][18][19][20]. Quantum wells and semiconductors are good candidates for absorber and sensors in the terahertz range [21][22][23].In recent decades, multiple quantum wells have been investigated due to their potential applications (e.g., photo-detectors, high-speed absorption modulators, electro optical switches, and terahertz oscillators) [24]. Technological applications of multiple quantum wells depend on their optical and transportation properties that related to the quantum well specification [25]. The intersubband optical absorption in an asymmetric double quantum well for different barrier widths calculated by Ozturk et al. [26]. The results reveal that the intersubband transitions and the energy levels in an asymmetric double quantum well can be modified and controlled by the barrier and the well width. The sensitivity of the absorption coefficient to the barriers and wells width can be used in various optical semiconductor device applications. 3 Kasapoglu et al. investigated the effects of the geometrical parameters and electric field in a double inverse parabolic quantum well [24]. They indicated that by changing the Al concentrations...

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“…[15][16][17][18][19][20] Also, impurities play an important role in understanding the optical and electronic properties of such structures. [21][22][23][24] In addition, extensive theoretical and experimental research has been published on the optical and electronic properties, excitons, and impurity levels in QDs. [25][26][27][28][29][30][31] Moreover, the effects of external influences such as applied electric and magnetic fields, temperature, pressure, strain, and laser on the physical properties of low-dimensional systems have greatly contributed to understanding the fascinating new phenomenon and creating new devices or improving the performance of existing ones.…”

Section: Introductionmentioning

confidence: 99%

Calculation of Intradonor Normalized Transition Energy in Spherical Quantum Dots Made of Different Materials

Mese

Cicek

Özkapı

et al. 2023

Physica Status Solidi (b)

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Under the effective mass approximation, the binding energies, transition energies between 1s and 1p states, and normalized transition energies of spherical quantum dots made of different materials are calculated using the variational method. In particular, binding, transition, and normalized transition energies are examined depending on the radius of the quantum dot and the position of the hydrogenic impurity. It is observed that the binding energy and transition energy decrease as the radius of the quantum dot increases, whereas the normalized transition energy increases. In all four different structures, it is seen that the binding energy first reaches a maximum and then starts to decrease according to the position of the hydrogenic impurity. In contrast, the transition energy behaves almost the opposite. Additionally, when the change of the normalized transition energy is examined according to the impurity position, it is determined that it decreases up to the value of ri/R = 0.6 and then remains almost constant. According to our literature review, the normalized transition energy for the four different quantum dots is calculated for the first time in this study.

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Binding energy of donor impurities in double inverse parabolic quantum well under electric field

Cited by 15 publications

References 24 publications

Self‐Polarization of Hydrogenic Impurity in Quantum Wells Made of Different Materials

Self‐Polarization of Hydrogenic Impurity in Quantum Wells Made of Different Materials

Optimization of terahertz absorption in periodic quantum well structures

Calculation of Intradonor Normalized Transition Energy in Spherical Quantum Dots Made of Different Materials

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