Nonlinear Optical Rectification and Oscillator Strength in a Spherical Quantum Dot with Parabolic Confinement in the Presence of the Electric Field

Physica Status Solidi (b)

Roy³

et al. 2022

Quantum dots (QDs) are acclaimed low-dimensional nanosystems, where we find complete spatial arrest of the motion of the carriers (electrons and holes). Their extremely small dimension helps them display quantum manifestations through various size-dependent physical properties. These properties can be tuned externally thereby making QDs immensely valuable components of technologically advanced devices. As a result, we frequently find research works that analyze various aspects of the low-dimensional nanosystems, [1][2][3][4][5][6][7][8] particularly emphasizing their nonlinear optical (NLO) responses. The effective confinement potential (ECP) of QD principally controls its energy spectrum and the eigenstates. Thus, modulation of ECP can be useful to tailor its properties and consequent applications in fabricating advanced quantum devices. Doping of impurity to QD influences its ECP, which, in turn, profoundly modulates its physical properties. Consequently, studies delving into the impurity effects in QD and other low-dimensional nanosystems are found to be quite abundant.

Section: Methodsmentioning

confidence: 99%

“…As a result, we frequently find research works that analyze various aspects of the low‐dimensional nanosystems, [ 1–8 ] particularly emphasizing their nonlinear optical (NLO) responses. [ 9–30 ]…”

Section: Introductionmentioning

confidence: 99%

Analyzing Time‐Average Excitation Rate Among Quantum Dot Eigenstates Triggered by Time‐Dependent Noise Strength

Datta¹,

Physica Status Solidi (b)

Roy³

et al. 2022

“…The interaction of LDSS with external electromagnetic fields gives rise to linear and nonlinear optical (NLO) responses [9–31] which unfold their immense potential in the fields of quantum computation and in laser technology [32–34] . Added to this, above interaction also opens up new vistas of electronic transport and many other significant phenomena revealed through the interplay between the external AC field and the LDSS confinement potential [34–39] .…”

Section: Introductionmentioning

confidence: 99%

Excitation Dynamics Among Impurity Doped Quantum Dot Eigenstates in a Polychromatic Field: Role of Gaussian White Noise

Datta¹,

Roy³

et al. 2022

ChemistrySelect

Current study focuses on realizing the role of Gaussian white noise (GWN) and external sinusoidal polychromatic radiation field (PRF) on the time-average excitation rate (TAER) of impurity doped quantum dot (QD). The PRF induces the transfer of electronic population from the ground state to the excited states in course of time-evolution. The PRF has been envisaged to be composed of four component fields that maintain either a prime or a non-prime frequency ratio. GWN couples with the system additively and multiplicatively. The study highlights the role of various physical parameters, presence of noise, mode of application of noise and the features of PRF (amplitude, phase and type of frequency ratio of the components) in shaping the TAER profiles. The TAER profiles have been found to be enriched with steady growth, steady decline, maximization (useful for obtaining large nonlinear optical response), minimization and saturation (the dynamic freezing). The study reveals promising scope of obtaining desired TAER of doped QD by judicious adjustment/regulation of several control parameters which may bear serious technological implications.

“…Electric field ( F ) and magnetic field ( B ) are two prominent physical quantities which are well known for providing valuable information on LDSS. The incorporation of F and B , in effect, alters the effective confinement potential of LDSS.…”

Section: Introductionmentioning

confidence: 99%

“…[4] Thus, we can come across a large number of studies that deal with impurity doping in LDSS, [5][6][7][8] showing special interest in nonlinear optical (NLO) properties. [9][10][11][12][13][14][15][16][17][18][19][20][21] Electric field (F) [22][23][24][25][26][27][28][29][30][31][32][33] and magnetic field (B) [24,28,30,[34][35][36][37] are two prominent physical quantities which are well known for providing valuable information on LDSS. The incorporation of F and B, in effect, alters the effective confinement potential of LDSS.…”

Section: Introductionmentioning

confidence: 99%

Profiles of Static Quadrupole Polarizability of Impurity‐Doped Quantum Dots Driven by Gaussian White Noise

Ghosh

Physica Status Solidi (b)

Bera

et al. 2020

Herein, the influence of Gaussian white noise on static quadrupole polarizability (SQP) of the impurity‐doped quantum dots (QDs) is studied. The SQP profiles are critically analyzed as several physical quantities are varied over a range in the absence and presence of noise. The introduction of noise to the system is accomplished via two different routes viz. “additive” and “multiplicative.” SQP profiles consist of noticeable features like maximization, minimization, and saturation in the absence of noise and presence of additive noise. However, on most occasions, the SQP profile becomes devoid of any noticeable characteristics in the presence of multiplicative noise. The multiplicative noise plays some noticeable role only during the direct variation in confinement energy. Herein, the exclusive role of additive noise having strength around a typical value for the generation of large SQP is highlighted. The findings bear mentionable importance on the nonlinear optical properties of QD‐based devices under the aegis of noise.