Exciton effects on the nonlinear optical rectification in one-dimensional quantum dots

Yu, Y. B.; Zhu, Shining; Guo, Kang-Xian

doi:10.1016/j.physleta.2004.12.013

Cited by 95 publications

(42 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From this figure, we can find that the quantum effect of χ (2) 0 in QDs is clear. It can be clearly seen that for each ω 0 , χ (2) 0 as a function of hυ has a maximum values which occurs due to the one-photon resonance enhancement, i.e., hυ ≈ E, and that the peak value of χ (2) 0 in spherical QDs can reach the magnitude of 10 −2 m/V, which is 3-4 orders of magnitude higher than that in the case that only one electron exists in one-dimensional QDs [21,24]. This large optical rectification effects is primarily attributed to the strong confinement in a spherical QD with a parabolic potential.…”

Section: Introductionmentioning

confidence: 94%

“…In the following we present the numerical results for the parameters appropriate to a GaAs/AlGaAs QD and take [24] m e = 0.067m 0 , m h = 0.090m 0 (m 0 is the mass of a free electron) and ε = 13.1. The check of the accuracy of the ground state is shown Table 1 It is obvious that the convergence of energy in the regime of strong confinement is not bad, and |E 0 − E i | M can be achieved.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of an electric field and nonlinear optical rectification of confined excitons in quantum dots

Xie

2009

Physica Status Solidi (b)

View full text Add to dashboard Cite

A novel hexameric macrocycle was directly prepared by acid‐catalyzed condensation of 2,4‐dimethylglycoluril with formaldehyde, as described by V. Sindelar and co‐workers in their Communication on The macrocycle binds halide anions inside the cavity through twelve C‐H ⋅⋅X− hydrogen bonding with high affinity and selectivity. The trivial name bambus[6]uril deriving from the bambusoidea subfamily was proposed as the macrocycle resemble part of a bamboo plant stem. Photograph courtesy of Milan Lipensky.

show abstract

Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Effect of an electric field and nonlinear optical rectification of confined excitons in quantum dots

Xie

2009

Physica Status Solidi (b)

View full text Add to dashboard Cite

show abstract

“…Apart from the well-known and well-studied quantum well hetero-structures (QWHs), which have square [3,6] and parabolic [3,[7][8][9][10] potential shape, cases of QWHs with half parabolic [11], graded [12], V-shaped [13] and inverse parabolic quantum well (IPQW) potential shape [14][15][16][17][18][19] have been produced and studied.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, their influence can be controlled by the presence of external fields. Several articles have been published on the influence of external static (electric and magnetic) fields on hydrogenic impurities [10][11][12][13][17][18][19][29][30][31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Binding energy of hydrogenic impurity states in an inverse parabolic quantum well under static external fields

Baskoutas

Terzis

2009

Eur. Phys. J. B

View full text Add to dashboard Cite

Abstract. In the present theoretical study, we investigate the influence of external fields (electric and/or magnetic) on the binding energy of hydrogenic impurities in a GaAs/Ga1−xAlxAs inverse parabolic quantum well, in which the parabolicity depends on the Al concentrations at the well center. Our calculations have been based on the potential morphing method in the effective mass approximation. The systematic theoretical investigation contains results with all possible combinations of the involved parameters, as quantum well width, Al concentrations at the well center, position of the impurity and magnitudes of the external fields. PACS

show abstract

“…They also assumed that the electron and the hole in the z direction are confined in semi-parabolic potentials with the same oscillator frequency [1]. They showed that the existence of an exciton enhances the nonlinear OR coefficient in comparison to the case that only one electron exists in the structure.…”

mentioning

confidence: 99%

Excitonic effects in nonlinear optical rectification in small semi‐parabolic quantum dots

Baskoutas

Paspalakis

Terzis

2007

Phys. Status Solidi (c)

View full text Add to dashboard Cite

We study the effects of excitons in nonlinear optical rectification in one-dimensional semi-parabolic quantum dots. We consider the case that the electron and the hole are confined in semi-parabolic potential with the same oscillator frequency. We present approximate analytical results in the strong confinement regime and find a closed-form relation between the nonlinear optical rectification coefficient of an exciton in the structure and the corresponding coefficient when only one electron exists in the structure. These results are also verified by numerical calculations performed with the potential morphing method.1 Introduction Recently, Yu et al. studied the effects of an exciton on the nonlinear optical rectification (OR) in an one-dimensional quantum dot that is strongly confined in the x and y directions. They also assumed that the electron and the hole in the z direction are confined in semi-parabolic potentials with the same oscillator frequency [1]. They showed that the existence of an exciton enhances the nonlinear OR coefficient in comparison to the case that only one electron exists in the structure. In the present work we extend the results of Yu et al.[1] and present approximate analytical results in the strong confinement regime. With the use of these results we find a closed-form relation between the nonlinear OR coefficient in the case that one exciton is confined in the quantum dot structure and the corresponding coefficient when only one electron exists in the structure. It is found that the two coefficients are related only by formula that contains the effective masses of the electron and the hole. These results are also verified by numerical calculations performed with the potential morphing method (PMM) [2][3][4].

show abstract

Exciton effects on the nonlinear optical rectification in one-dimensional quantum dots

Cited by 95 publications

References 27 publications

Effect of an electric field and nonlinear optical rectification of confined excitons in quantum dots

Effect of an electric field and nonlinear optical rectification of confined excitons in quantum dots

Binding energy of hydrogenic impurity states in an inverse parabolic quantum well under static external fields

Excitonic effects in nonlinear optical rectification in small semi‐parabolic quantum dots

Contact Info

Product

Resources

About