OPTICAL ABSORPTION SPECTRA RELATED TO DONOR IMPURITIES IN GaAs/Ga1-xAlxAs RIDGE QUANTUM WIRE

Khordad, R.; Bijanzadeh, A. R.

doi:10.1142/s0217984909021715

Cited by 22 publications

(4 citation statements)

References 42 publications

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“…Another optical property is donor‐related optical absorption spectra in nanostructures. Hitherto, some investigations have been made on this property in quantum well and quantum wire 18, 25.…”

Section: Introductionmentioning

confidence: 99%

Intersubband optical absorption coefficients and refractive index changes in a V‐groove quantum wire

Khordad

Khaneghah

2011

Physica Status Solidi (b)

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In this paper, the intersubband optical absorption coefficients and the refractive index changes are studied in a V-groove quantum wire. We use analytical expressions for these properties obtained by the compact-density matrix formalism. In this regard, the linear, nonlinear and total intersubband absorption coefficients and refractive index changes are investigated as a function of the bend width wire (b), the incident optical intensity (I), and the angle u. According to the results obtained from the present work, it is deduced that: (i) The linear terms in the refractive index changes and absorption coefficients dose not change with incident optical intensity whereas nonlinear terms depend on incident optical intensity; (ii) The total refractive index changes and the absorption coefficients reduce as the incident optical intensity increases; (iii) The total absorption coefficient and refractive index changes increase and also shift toward higher energies as the bend width wire increases; and (iv) The total refractive index changes and absorption coefficients shift toward higher energies as the angle u increases.

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Section: Introductionmentioning

confidence: 99%

Intersubband optical absorption coefficients and refractive index changes in a V‐groove quantum wire

Khordad

Khaneghah

2011

Physica Status Solidi (b)

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“…To obtain information about the optical properties of low-dimensional systems, the reader can refer to Refs. [24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Quantum Wire with Triangle Cross Section: Optical Properties

Khordad¹,

Tafaroji²,

Katebi³

et al. 2012

Commun. Theor. Phys.

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In the present work, the optical properties of a GaAs quantum wire with equilateral triangle cross section are studied. For this purpose, we use analytical expressions for optical properties obtained by the compact-density matrix formalism. Here, we investigate the intersubband optical absorption coefficients and refractive index changes as a function of the triangle side (L) and the incident optical intensity (I). According to the obtained results, it is found that: (i) The total refractive index changes increase and shift towards lower energies when the triangle side increases. (ii) The total absorption coefficient decreases as the triangle side increases. Also, the resonance peak shifts towards lower energies by increasing the triangle side.

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“…More studies analyzing these structures have been focused on the interband light absorption coefficient in the spherical [7,8,9], parabolic, cylindrical and rectangular [10] quantum dots under the influence of magnetic field [11,12]. More other works on optical properties in nanostructures [13,14], band structure calculations, transport properties of Aharonov-Bohm (AB) type oscillations [15,16] and Altshuler-Aharonov-Spivak type oscillation [17,18].…”

Section: Introductionmentioning

confidence: 99%

A quantum pseudodot system with two-dimensional pseudoharmonic potential under external magnetic and AB flux fields

Ikhdair,

Hamzavi

2012

Preprint

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Using the Nikiforov-Uvarov (NU) method, the energy levels and the wave functions of an electron confined in a two-dimensional (2D) pseudoharmonic quantum dot are calculated under the influence of temperature and an external magnetic field inside dot and Aharonov-Bohm (AB) field inside a pseudodot. The exact solutions for energy eigenvalues and wave functions are computed as functions of the chemical potential parameters, applied magnetic field strength, AB flux field, magnetic quantum number and temperature. Analytical expression for the light interband absorption coefficient and absorption threshold frequency are found as functions of applied magnetic field and geometrical size of quantum pseudodot. The temperature dependence energy levels for GaAs semiconductor are also calculated.

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OPTICAL ABSORPTION SPECTRA RELATED TO DONOR IMPURITIES IN GaAs/Ga_1-xAl_xAs RIDGE QUANTUM WIRE

Cited by 22 publications

References 42 publications

Intersubband optical absorption coefficients and refractive index changes in a V‐groove quantum wire

Intersubband optical absorption coefficients and refractive index changes in a V‐groove quantum wire

Quantum Wire with Triangle Cross Section: Optical Properties

A quantum pseudodot system with two-dimensional pseudoharmonic potential under external magnetic and AB flux fields

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