Kanchan  Sarkar Author of Evaluating Organization Development
FEATURED AUTHOR

Kanchan Sarkar

Post Doctoral Scientist
Institut fรผr Theoretische Chemie, Universitรคt Ulm

๐Ÿ’Ž Designed & implemented several hybrid soft-computing algorithms for โœฏLocating minimum energy structures of atomic, molecular & ionic clusters, undoped/doped oligomers. โœฏOffering soft, transferable & accurate optimized DFT/PAW-PBE dataset library. ๐Ÿ’Ž Explored ab initio thermoelastic material properties under high-temperature & pressure conditions. ๐Ÿ’Ž Current: โœฏChlorine-ion batteries, โœฏadvancing software (VLab, MOGADOC) with AI, โœฏstudying (post-, anti-) perovskites.

Biography

โšซ *๐’‘๐’…๐’‡ ๐’—๐’†๐’“๐’”๐’Š๐’๐’ ๐’๐’‡ ๐’‚๐’„๐’‚๐’…๐’†๐’Ž๐’Š๐’„ ๐’‘๐’“๐’๐’‡๐’Š๐’๐’† (๐™˜๐™ซโ€‹โ€‹โ€‹โ€‹โ€‹): https://www.academia.edu/33424265/CV_KANCHANSARKAR_pdf

โšซ ๐‘ช๐‘จ๐‘น๐‘ฌ๐‘ฌ๐‘น ๐‘บ๐‘ผ๐‘ด๐‘ด๐‘จ๐‘น๐’€
โฆฟ ๐‘ผ๐’๐’Š๐’—๐’†๐’“๐’”๐’Š๐’•๐’‚ฬˆ๐’• ๐‘ผ๐’๐’Ž (Institut fรผr Theoretische) - Research Scientist (Dec 2020 โ€“ Dec 2023)
โฆฟ ๐‘ฝ๐’Š๐’”๐’—๐’‚-๐‘ฉ๐’‰๐’‚๐’“๐’‚๐’•๐’Š ๐‘ผ๐’๐’Š๐’—๐’†๐’“๐’”๐’Š๐’•๐’šโ€‹โ€‹โ€‹โ€‹โ€‹ - Voluntary association (Sept. 2019 โ€“ Dec 2020)
โฆฟ ๐‘ช๐’๐’๐’–๐’Ž๐’ƒ๐’Š๐’‚ ๐‘ผ๐’๐’Š๐’—๐’†๐’“๐’”๐’Š๐’•๐’š (Applied Physics & Applied Mathematics) - Associate Research Scientist (Aug. 2017 โ€“ Aug. 2019)
โฆฟ ๐‘พ๐’‚๐’Œ๐’† ๐‘ญ๐’๐’“๐’†๐’”๐’• ๐‘ผ๐’๐’Š๐’—๐’†๐’“๐’”๐’Š๐’•๐’š (Dept. of Physics) - Visiting Scientist (July 2016)
โฆฟ ๐‘ผ๐’๐’Š๐’—๐’†๐’“๐’”๐’Š๐’•๐’š ๐’๐’‡ ๐‘ด๐’Š๐’๐’๐’†๐’”๐’๐’•๐’‚ (Chemical Engineering and Materials Science) - Post-Doctoral Assistant (Sept. 2014 - Aug. 2017)
โฆฟ๐‘ฐ๐’๐’…๐’Š๐’‚๐’ ๐‘จ๐’”๐’”๐’๐’„๐’Š๐’‚๐’•๐’Š๐’๐’ ๐’‡๐’๐’“ ๐’•๐’‰๐’† ๐‘ช๐’–๐’๐’•๐’Š๐’—๐’‚๐’•๐’Š๐’๐’ ๐’๐’‡ ๐‘บ๐’„๐’Š๐’†๐’๐’„๐’† - Research Associate-I (March 2014 - August 2014)

โšซ ๐‘ฌ๐‘ซ๐‘ผ๐‘ช๐‘จ๐‘ป๐‘ฐ๐‘ถ๐‘ต
โฆฟ ๐‘ฐ๐’๐’…๐’Š๐’‚๐’ ๐‘จ๐’”๐’”๐’๐’„๐’Š๐’‚๐’•๐’Š๐’๐’ ๐’‡๐’๐’“ ๐’•๐’‰๐’† ๐‘ช๐’–๐’๐’•๐’Š๐’—๐’‚๐’•๐’Š๐’๐’ ๐’๐’‡ ๐‘บ๐’„๐’Š๐’†๐’๐’„๐’† (Department of Physical Chemistry) ๐Ÿฎ๐Ÿฌ๐Ÿฌ๐Ÿด-๐Ÿฎ๐Ÿฌ๐Ÿญ๐Ÿฐ
๐‘ท๐’‰.๐‘ซ. ๐‘ป๐’‰๐’†๐’”๐’Š๐’”: ๐‘บ๐’๐’‡๐’•-๐‘ช๐’๐’Ž๐’‘๐’–๐’•๐’Š๐’๐’ˆ ๐’‚๐’๐’ˆ๐’๐’“๐’Š๐’•๐’‰๐’Ž๐’” ๐’‡๐’๐’“ ๐’”๐’๐’๐’—๐’Š๐’๐’ˆ ๐’”๐’๐’Ž๐’† ๐’‘๐’“๐’๐’ƒ๐’๐’†๐’Ž๐’” ๐’๐’‡ ๐‘ธ๐’–๐’‚๐’๐’•๐’–๐’Ž ๐‘ช๐’‰๐’†๐’Ž๐’Š๐’”๐’•๐’“๐’š
๐•ฎ๐–”๐–’๐–’๐–Ž๐–™๐–™๐–Š๐–Š: Prof. S.P. Bhattacharyya, Prof. Satrajit Adhikari, Prof. Kamal Bhattacharyya, Prof. S.C. Bhattacharyya(Chair).

โฆฟ ๐‘ฐ๐’๐’…๐’Š๐’‚๐’ ๐‘บ๐’•๐’‚๐’•๐’Š๐’”๐’•๐’Š๐’„๐’‚๐’ ๐‘ฐ๐’๐’”๐’•๐’Š๐’•๐’–๐’•๐’† โ€“ ๐‘ฒ๐’๐’๐’Œ๐’‚๐’•๐’‚ (Center for Soft Computing Research and Machine Intelligence Unit) ๐Ÿฎ๐Ÿฌ๐Ÿฌ๐Ÿด-๐Ÿฎ๐Ÿฌ๐Ÿฌ๐Ÿต
Certificate course on Machine Intelligence & Soft Computing
๐‚๐จ๐ฎ๐ซ๐ฌ๐ž๐ฌ: Genetic Algorithms, Fuzzy Sets, Rough Sets, Artificial Neural Networks, Digital Image Processing, Pattern Recognition, Data Mining. Course Coordinator: Professor S. K. Pal
๐‘ท๐’“๐’๐’‹๐’†๐’„๐’•๐’” ๐’„๐’๐’Ž๐’‘๐’๐’†๐’•๐’†๐’…: Determination of transition temperature in Ising model system by using Genetic Algorithm (supervisor: Professor C. A. Murthy).
Simulation of a Single Layer Perceptron for Pattern Classification of IRIS data set (supervisor: Dr Ashish Ghosh).

โฆฟ ๐‘ฝ๐’Š๐’”๐’—๐’‚-๐‘ฉ๐’‰๐’‚๐’“๐’‚๐’•๐’Š ๐‘ผ๐’๐’Š๐’—๐’†๐’“๐’”๐’Š๐’•๐’š (Department of Chemistry) ๐Ÿฎ๐Ÿฌ๐Ÿฌ๐Ÿฎ-๐Ÿฎ๐Ÿฌ๐Ÿฌ๐Ÿณ
๐‘ฉ๐’‚๐’„๐’‰๐’†๐’๐’๐’“ ๐’๐’‡ ๐‘บ๐’„๐’Š๐’†๐’๐’„๐’† (๐‘ฉ.๐‘บ๐’„.) & ๐‘ด๐’‚๐’”๐’•๐’†๐’“ ๐’๐’‡ ๐‘บ๐’„๐’Š๐’†๐’๐’„๐’† (๐‘ด.๐‘บ๐’„.)
๐‘ช๐’๐’‚๐’”๐’”/๐‘ซ๐’Š๐’—๐’Š๐’”๐’Š๐’๐’: First Class with Distinction (B. Sc.) & First Class (M. Sc.; Specialization: Physical Chemistry)
๐‘ด๐’‚๐’”๐’•๐’†๐’“๐’” ๐‘ท๐’“๐’๐’‹๐’†๐’„๐’•๐’”: Interplay between size and impurity position of doped quantum dot

โšซ ๐‘บ๐‘ฒ๐‘ฐ๐‘ณ๐‘ณ๐‘บ
โฆฟ ๐‘ถ๐‘บ: Open source GNU/Linux distros, Red Hat, Sun Solaris, OS X and Windows.
โฆฟ ๐‘ช๐’๐’…๐’Š๐’๐’ˆ: Fortran, Python, bash/zsh, MatLab/Octave, C, LATEX, HTML, CSS, Java-script
โฆฟ ๐‘บ๐’๐’‡๐’•๐’˜๐’‚๐’“๐’†: ATOMPAW, Quantum-Espresso, VASP, WIEN2k & GAUSSIAN
โฆฟ ๐‘ฌ๐’™๐’‘๐’†๐’“๐’•๐’Š๐’”๐’†: Evolutionary and Nature-inspired computing, Classical optimization, Fuzzy logic.
Working proficiency in Machine learning, Deep learning and Data mining.
โฆฟ ๐‘ณ๐’‚๐’๐’ˆ๐’–๐’‚๐’ˆ๐’†: English (fluent), Bengali (native), Hindi (native), German (A1).


โšซ ๐‘จ๐‘พ๐‘จ๐‘น๐‘ซ๐‘บ ๐‘จ๐‘ต๐‘ซ ๐‘ฏ๐‘ถ๐‘ต๐‘ถ๐‘น๐‘บ
โ–ช Division of Computational Physics Travel Award 2019, ๐‘จ๐’Ž๐’†๐’“๐’Š๐’„๐’‚๐’ ๐‘ท๐’‰๐’š๐’”๐’Š๐’„๐’‚๐’ ๐‘บ๐’๐’„๐’Š๐’†๐’•๐’š.
โ–ช Program Committee Member and Reviewer: International Conference on Information Society
and Smart Cities (๐‘ฐ๐‘บ๐‘ช 2018), Oxford city, United Kingdom, 06-07 June 2018.
โ–ช One of the active developers of the online software โ€œVirtual Laboratory of Earth and Planetary
Materialsโ€ (๐‘ฝ๐‘ณ๐’‚๐’ƒ) for high temperature and high-pressure elasticity calculations.
โ–ช Member of American Physical Society (2014-2019).
โ–ช Member of American Geophysical Union (2014-2019).
โ–ช Awarded on โ€œChanging Paradigms in Theoretical and Computational Chemistry: From Atoms to Molecular Clustersโ€. (December 18-20, 2009), at University of Pune.
โ–ช Fellowship by Council of Scientific and Industrial Research (๐‘ต๐‘ฌ๐‘ป ๐‘ช๐‘บ๐‘ฐ๐‘น-2007, India).
โ–ช Rank in the West Bengal Joint Entrance examination (๐‘ด๐’†๐’…๐’Š๐’„๐’‚๐’): 713 (2002).

Currently, KS traverses across the first-principles electronic structure upshots to commentary on the adsorption of chlorine and the formation of a surface chloride on Li(001) and Mg(0001). KS et al. anticipate that these theoretical outcomes within the framework of density functional theory are relevant for ๐—ฐ๐—ต๐—น๐—ผ๐—ฟ๐—ถ๐—ฑ๐—ฒ-๐—ถ๐—ผ๐—ป ๐—ฏ๐—ฎ๐˜๐˜๐—ฒ๐—ฟ๐—ถ๐—ฒ๐˜€ in which lithium and magnesium are potential anode materials. Besides, it is also of fundamental interest, as halide adsorption on metal electrodes is an inevitable process in electrochemistry. He is studying the adsorption properties and determining the stable adsorption structures, both with respect to the free chlorine molecule and as a function of the electrode potential. He will also address the process of chloride formation on the surface.
Besides, KS is one of the active developers of the database software ๐‘ด๐‘ถ๐‘ฎ๐‘จ๐‘ซ๐‘ถ๐‘ช (MOlecular GAsphase DOCumentation), produced and distributed by the Chemieinformationssysteme (formerly Sektion fรผr Spektren- und Strukturdokumentation) at the University of Ulm.  ๐‘ด๐‘ถ๐‘ฎ๐‘จ๐‘ซ๐‘ถ๐‘ช has been a powerful tool for scientists worldwide to retrieve information about gas phase investigations.

KS got his formal training in soft computing and machine intelligence methods from the Center for Soft Computing Research and Machine Intelligence Unit, ๐‘ฐ๐’๐’…๐’Š๐’‚๐’ ๐‘บ๐’•๐’‚๐’•๐’Š๐’”๐’•๐’Š๐’„๐’‚๐’ ๐‘ฐ๐’๐’”๐’•๐’Š๐’•๐’–๐’•๐’† - ๐‘ฒ๐’๐’๐’Œ๐’‚๐’•๐’‚. During doctoral training in the ๐‘ฐ๐’๐’…๐’Š๐’‚๐’ ๐‘จ๐’”๐’”๐’๐’„๐’Š๐’‚๐’•๐’Š๐’๐’ ๐’‡๐’๐’“ ๐’•๐’‰๐’† ๐‘ช๐’–๐’๐’•๐’Š๐’—๐’‚๐’•๐’Š๐’๐’ ๐’๐’‡ ๐‘บ๐’„๐’Š๐’†๐’๐’„๐’† - ๐‘ฒ๐’๐’๐’Œ๐’‚๐’•๐’‚, he experimented with ๐’”๐’†๐’—๐’†๐’“๐’‚๐’ ๐’‘๐’–๐’“๐’† ๐’‚๐’๐’… ๐’‰๐’š๐’ƒ๐’“๐’Š๐’… ๐’”๐’๐’‡๐’•-๐’„๐’๐’Ž๐’‘๐’–๐’•๐’Š๐’๐’ˆ ๐’•๐’†๐’„๐’‰๐’๐’Š๐’’๐’–๐’†๐’” in the general context of computing global minimum energy structures of oligomers and homogeneous or heterogeneous aggregates of atoms or molecules. In his postdoctoral studies in the USA (๐‘ช๐‘ฌ๐‘ด๐‘บ, ๐‘ผ๐‘ด๐‘ต; ๐‘จ๐‘ท๐‘จ๐‘ด, ๐‘ช๐‘ผ; ๐‘พ๐‘ญ๐‘ผ), he explored the possibilities that evolutionary computing techniques can offer a ๐’„๐’๐’๐’”๐’Š๐’”๐’•๐’†๐’๐’• ๐’‘๐’“๐’๐’„๐’†๐’…๐’–๐’“๐’† ๐’๐’‡ ๐’ˆ๐’†๐’๐’†๐’“๐’‚๐’•๐’Š๐’๐’ˆ ๐’‘๐’“๐’๐’‹๐’†๐’„๐’•๐’๐’“ ๐’‚๐’–๐’ˆ๐’Ž๐’†๐’๐’•๐’†๐’… ๐’˜๐’‚๐’—๐’† (๐‘ท๐‘จ๐‘พ) ๐’…๐’‚๐’•๐’‚๐’”๐’†๐’•๐’”. These evolutionary optimized PAW (๐‘ฌ๐‘ท๐‘จ๐‘พ) ๐’…๐’‚๐’•๐’‚๐’”๐’†๐’•๐’” maintain the ๐’”๐’‚๐’Ž๐’† ๐’๐’†๐’—๐’†๐’ ๐’๐’‡ ๐’‚๐’„๐’„๐’–๐’“๐’‚๐’„๐’š as all-electron full-potential linearized augmented plane wave (๐‘จ๐‘ฌ-๐‘ญ๐‘ณ๐‘จ๐‘ท๐‘พ) ๐’„๐’‚๐’๐’„๐’–๐’๐’‚๐’•๐’Š๐’๐’๐’” up to very high pressure. He had also introduced a ๐’๐’†๐’˜ ๐’Ž๐’†๐’‚๐’”๐’–๐’“๐’† ๐’๐’‡ ๐’‚๐’•๐’๐’Ž๐’Š๐’„ ๐’…๐’‚๐’•๐’‚๐’”๐’†๐’• ๐’’๐’–๐’‚๐’๐’Š๐’•๐’š by considering performance uniformity over an extended pressure range. His other projects involved computing ab initio ๐’•๐’‰๐’†๐’“๐’Ž๐’๐’†๐’๐’‚๐’”๐’•๐’Š๐’„ ๐’‘๐’“๐’๐’‘๐’†๐’“๐’•๐’Š๐’†๐’” ๐’๐’‡ ๐’Ž๐’‚๐’•๐’†๐’“๐’Š๐’‚๐’๐’” under extremely high temperature and pressure conditions and designing atomic datasets for ๐’๐’๐’˜๐’†๐’“ ๐’Ž๐’‚๐’๐’•๐’๐’† ๐’„๐’๐’๐’…๐’Š๐’•๐’Š๐’๐’๐’” to understand ๐’…๐’†๐’†๐’‘-๐’†๐’‚๐’“๐’•๐’‰ ๐’‘๐’“๐’๐’„๐’†๐’”๐’”๐’†๐’”. He was also an active software developer for the Virtual Laboratory of Earth and Planetary Materials (๐™‘๐™‡๐™–๐™—) for high temperature and high-pressure elasticity calculations.

Education

    Post-Doctorate, APAM, Columbia University, NYC, 2017-
    Post-Doctorate, CEMS, University of Minnesota, 2014-2017
    Research Scientist-I, IACS, Kolkata, 2014
    PhD, IACS, Kolkata, 2014
    Post Doctoral Scientist, Institut fรผr Theoretische Chemie, U

Areas of Research / Professional Expertise

    โฆฟ Uniform goodness measure for density functional theory potentials; evolutionary optimized transferable projector augmented-wave atomic files for use in a number of electronic structure codes.
    โฆฟ Materials properties prediction through zero to ultra-high pressure, at the scalar relativistic level; computing ab initio thermoelastic properties and effect of spin transitions in some perovskite, post-perovskite materials at high temperature and pressure.
    โฆฟ Machine Intelligence-based computing paradigm: Stochastic global optimization procedures: simulated annealing, evolutionary computing: evolutionary strategies, genetic algorithms, differential evolution; particle swarm optimization, ant colony algorithm.
    โฆฟ Applications in Exploration of Clusters: Lennard-Jones, Morse, ionic and metal clusters; nanoalloys; crystal structure.
    โฆฟ Applications in energy extremalization; Hamiltonian diagonalization; eigenvalues, eigenvectors computing; locating first-order saddle points; reaction paths.
    โฆฟ Application of artificial neural networks, fuzzy logic theory in problems of chemical physics.
    โฆฟ Deep learning, machine learning.
    โฆฟ Blending density functional theory based open-source codes with soft computing methodologies.
    โฆฟ Computer Programming: stochastic and classical optimization using Fortran, Python, bash/zsh, MatLab/Octave, C, and their combinations.

Personal Interests

    โšซ Writing short and attractive codes to bypass repetitive customary jobs.
    โšซ Identify knowledge gaps perceived by single scientific disciplines.
    โšซ Transactional interactions with people from experimental, theoretical, computational and engineering research for communicating multifaceted problems.
    โšซ Comprehensive intercultural and international experiences.
    โšซ Organising beneficial events such as "Science Week" and "Science in 1st hand" for school students as well as the general public.
    โšซ New artificial intelligence-based spin-out software company for the prediction of chemical and pharmaceutical materials on demand.

Websites

Books

Featured Title
 Featured Title - Soft Computing in Chemical and Physical Sciences - 1st Edition book cover

Articles

Computer Physics Communications Volume 233, December 2018, Pages 110-122

EPAW-1.0 code for evolutionary optimization of PAW datasets especially for high-pressure applications


Published: May 25, 2021 by Computer Physics Communications Volume 233, December 2018, Pages 110-122
Authors: KanchanSarkar, N.A.W.Holzwarth, R.M.Wentzcovitch

We present a bio-inspired stochastic optimization strategy that optimizes projector augmented wave (PAW) datasets, for a user-specified pressure range, to realize the highest possible accuracy in high-throughput density functional theory calculations within the framework of PAW method. We named the optimizer โ€œEvolutionary Generator of projector augmented wave datasetsโ€ (EPAW-1.0).

JGR: Solid Earth

Thermoelasticity of Iron- and Aluminum-Bearing MgSiO3 Postperovskite


Published: May 25, 2021 by JGR: Solid Earth
Authors: Gaurav Shukla, Kanchan Sarkar, Renata M. Wentzcovitch

We present ab initio (LDA + Usc) studies of high-temperature and high-pressure elastic properties of pure as well as iron-bearing (ferrous, Fe2+, and ferric, Fe3+) and aluminum-bearing MgSiO3 postperovskite, the likely dominant phase in the deep lower mantle of the Earth.

Journal of Computational Physics

Evolutionary optimization of PAW data-sets for accurate high pressure simulation


Published: Jun 23, 2017 by Journal of Computational Physics
Authors: KanchanSarkar, Mehmet Topsakal, N.A.W. Holzwarth, Renata M. Wentzcovitch
Subjects: Physics

We examine the challenge of performing accurate electronic structure calculations at high pressures by comparing the results of all-electron full potential linearized augmented-plane-wave calculations, as implemented in the WIEN2k code, with those of the projector augmented wave (PAW) method, as implemented in Quantum ESPRESSO or Abinit code.

International Journal of Quantum Chemistry

Flying onto global minima on potential energy surfaces: A swarm intelligence gui


Published: Nov 12, 2016 by International Journal of Quantum Chemistry
Authors: Rishabh Shukla, ๏ฟผDebmalya Ray, ๏ฟผKanchan Sarkar, ๏ฟผMayank Kumar Dixit, ๏ฟผShankar Prasad Bhattachary
Subjects: Chemistry, Physics

A novel quantum-classical recipe for locating the global minimum on the potential energy surface of a large molecule and simultaneously predicting the associated electronic charge distribution is developed by interfacing the classical particle swarm optimization with a near optimal unitary evolution scheme for the trial one electron density matrix.

The Journal of Chemical Physics

Single string based global optimizer for geometry optimization in strongly coupl


Published: Aug 01, 2013 by The Journal of Chemical Physics
Authors: Kanchan Sarkar1 and S. P. Bhattacharyya
Subjects: Chemistry, Physics

We propose and implement a simple adaptive heuristic to optimize the geometries of clusters of point charges or ions with the ability to find the global minimum energy configurations.

International Journal of Quantum Chemistry

A constrained variational approach to the designing of low transport band gap ma


Published: Jul 11, 2011 by International Journal of Quantum Chemistry
Authors: Kanchan Sarkar, ๏ฟผRahul Sharma, ๏ฟผS. P. Bhattacharyya
Subjects: Chemistry, Physics

We have proposed and implemented a constrained variational method in which total energy of neutral PT or PSe oligomers is minimized under the constraint that the band gap measured by HOMOโ€“LUMO energy difference is also a minimum in each case.

Superlattices and Microstructures

Interplay between size and impurity position of doped quantum dot


Published: May 11, 2011 by Superlattices and Microstructures
Authors: Kanchan Sarkar, Nirmal Kr. Datta, Manas Ghosh

We explore the effect of on and off-center repulsive impurities on regular parabolic dots and their impact on the level structures coupled with a variation in the dot size. Information entropy and probability density are invoked to monitor the pattern of evolution of the electronic states.

Physica E: Low-dimensional Systems and Nanostructures

Dynamics of electron impurity doped quantum dots in the presence of time-varying


Published: Aug 17, 2010 by Physica E: Low-dimensional Systems and Nanostructures
Authors: Kanchan Sarkar, Nirmal Kumar Datta, Manas Ghosh
Subjects: Physics

We explore the pattern of time evolution of eigenstates of a repulsive impurity doped quantum dot. The quantum dot is two dimensional and contains one electron which is harmonically confined.

J. Chem. Theory Comput.

Blending Determinism with Evolutionary Computing: Applications to the Calculatio


Published: Feb 01, 2010 by J. Chem. Theory Comput.
Authors: Kanchan Sarkar, Rahul Sharma and S. P. Bhattacharyya
Subjects: Chemistry, Physics

A density matrix based soft-computing solution to the quantum mechanical problem of computing the molecular electronic structure of fairly long polythiophene chains is proposed.

Physica E: Low-dimensional Systems and Nanostructures

Frequency dependent linear and non-linear response properties of electron impuri


Published: Jan 15, 2010 by Physica E: Low-dimensional Systems and Nanostructures
Authors: Kanchan Sarkar, Nirmal Kumar Datta, Manas Ghosh
Subjects: Physics

We explore the pattern of frequency-dependent linear and non-linear optical (NLO) response of electron impurity doped quantum dots harmonically confined in two dimensions.