hits since 20 March 2007## Dr Stanko Tomić

Senior Research Scientist

Contact details:

Computational Science and Engineering Department

CCLRC Daresbury Laboratory

Keckwick Lane

Daresbury

Warrington

Cheshire WA4 4AD

United Kingdom

+44 (0)1925 603204

+44 (0)1925 603634

## Main Research Interests

- Physics of Semiconductor QD and QW Nanostructures

- Design and modelling of optoelectronic devices

- Electronic Structure Theory

- Density Functional Theory

## CV

## Publications

## Book Chapters

P.J. Klar and

S. Tomić, “Electronic properties of (Ga,In)(N,As)-based heterostructures” Chapter 5 inPhysics and application of dilute nitrides(Eds. I. Buyanova and C. Weimin, Taylor&Francis Books Inc. London 2004,ISBN:1591690196) p. 117-160.E.P. O’Reilly, A. Lindsey, S. Fehy,

S. Tomić, and P.J. Klar, “A tight-binding based analysis of the band anti-crossing model and its application in GaNAs alloys” inDilute Nitrides (III-N-V) Semiconductors: Physics and Technology(Ed. M. Henin, Elsevier Science, Amsterdam 2005,ISBN:0080445020) Chapter 11, p.361-391.

## Papers in refereed journals

S. Tomić,“Optical properties of dilute nitrogen GaInNAs quantum dots,” accepted for publication inApplied Physics Letters(available on request)W. M. McGee, R.S. Williams, M.J. Ashwin, T. S. Jones,

E. M. Clarke, J. Zhang, andS. Tomić,“Structure, morphology, and optical properties of GaInNAs quantum wells: the influence of the growth mechanism,” accepted for publication inPhysical Review B(available on request)R.S. Williams, W.M. McGee, M.J. Ashwin, T. S. Jones, E. Clarke, P. Stavrinou, J. Zhang,

S. Tomić, C.P.A. Mulcahy, “Wavelength control across the near IR-spectrum with GaInNAs,”Applied Physics Letters90,032109(2007)P. J. Klar, J. Teubert, M. Güngerich, T. Niebling, H. Grüning, W. Heimbrodt, K. Volz, W. Stolz, A. Polimeni, M. Capizzi, E. P. O'Reilly, A. Lindsay, M. Galuppi, L. Geelhaar, H. Riechert, and

S. Tomić, “Hydrostatic pressure experiments on dilute nitride alloys,”Physica Status Solidi (b)244,24 (2007)(Invited Paper)D.G. McConville, S.J. Sweeney, A.R. Adams,

S. Tomićand H. Riechert, “The temperature and pressure dependence of the recombination mechanisms in 1.3μm and 1.5μm GaInNAs lasers,”Physica Status Solidi (b)244,208 (2007)S. R. Jin, C.N. Ahmad, S.J. Sweeney, A.R. Adams, B.N. Murdin, H. Page, X. Marcadet, C. Sirtori and

S. Tomić,“Spectroscopy of GaAs/AlGaAs quantum-cascade lasers using hydrostatic pressure”Applied Physics Letters89,221105 (2006)

S. Tomić,“Electronic and optical properties of dilute nitrogen quantum dots,”IEE Proceedings-Optoelectronics153,293 (2006)(Special Issue)

S. Tomić,A.G. Sunderland, and I.J. Bush, “Parallel multi-bandk·pcode for electronic structure of zinc-blend semiconductor quantum dots,”Journal of Materials Chemistry16, 1963 (2006)(Special Issue)

S. Tomić,“Electronic structure of InGaAsN/GaAs(N) quantum dots by 10-bandk·ptheory,”Physical Review B73, 125348 (2006).

S. Tomić,P. Howe, N.M. Harrison, and T.S. Jones, “Theoretical analysis of strain and strain-decay in InAs/GaAs(001) multilayer quantum dot growth,”Journal of Applied Physics99,093522 (2006)

S. Tomić, E.P. O'Reilly, “Influence of confinement energy and band-anti-crossing effect on the electron effective mass in GaInNAs quantum wells,”Physical Review B71,233301 (2005).

S. Tomić, E.P. O'Reilly, P.J. Klar, H. Grüning, W. Heimbrodt, W.M. Chen and I.A. Buyanova, “The influence of conduction-band nonparabolicity on electron confinement and effective mass in Ga(N,As)/GaAs quantum wells”,Physical ReviewB69, 245305 (2004).E.P. O’Reilly

,A. Lindsay,S. Tomić^{ }and P.J. Klar, “Theory of electron confinement and electron effective mass in dilute nitride alloys and heterostructures”Physica Status Solidi (b)241, 3099 (2004)()Invited Paper

S. Tomić, E.P. O’Reilly, R. Fehse, S.J. Sweeney, A.R. Adams, A.D. Andreev, S. A. Choulis, T.J.C. Hosea and H. Riechert, “Theoretical and Experimental Analysis of 1.3mm InGaAsN/GaAs Lasers”, IEEEJournal of Selected Topics in Quantum Electronics9, 1228 (2003).S.R. Jin, S. J. Sweeney,

S. Tomić, A. R. Adams, and H. Riechert, “High-Pressure Studies of Recombination Mechanisms in 1.3 μm GaInNAs Quantum-Well Lasers”, IEEEJournal ofSelected Topics in Quantum Electronics9, 1196 (2003).G. Knowles, R. Fehse,

S.Tomić, S.J. Sweeney, T.E. Sale, A.R. Adams, E. P. O’Reilly, G. Steinle and H. Riechert, “The temperature and pressure dependence of 1.3mm GaInNAs vertical-cavity surface-emitting lasers (VCSELs)”, IEEEJournal ofSelected Topics in Quantum Electronics9, 1202 (2003).S. R. Jin, S. J. Sweeney,

S. Tomić, A.R. Adams and H. Riechert, “Unusual increase of the Auger current in 1.3mm GaInNAs quantum-well lasers by applying hydrostatic pressure”,Applied Physics Letters82, 2335 (2003).S.B. Constant,

S. Tomić, D. Lock, T.E. Sale, S. J. Sweeney, and T.J.C. Hosea, “Spectroscopic characterisation of 1450 nm semiconductor pump laser structures for Raman amplifiers,”Journal ofApplied Physics93,9446 (2003).D. Indjin,

S. Tomić, Z. Ikonić, P. Harrison, R. W. Kelsall, V. Milanović, and S. Kocinac, “Digitally graded GaAs/Al_{44}Ga_{56}As quantum-cascade laser”,Physica E17, 620 (2003)

S. Tomićand E. P. O’Reilly, “Optimization of material parameters in 1.3 μm InGaAsN/GaAs lasers”, IEEEPhotonics Technology Letters15, 6 (2003).S. A. Choulis,

S. Tomić, E. P. O’Reilly and T. J. C. Hosea^{ }, “Determining the band-structure of an InGaNAs/GaAs semiconductor laser structure using non-destructive photomodulated reflectance measurements andk·pstudies”,Solid State Communications125, 155 (2003)S.A. Choulis, T.J.C. Hosea,

S. Tomić, M. Kamal-Saadi, B.A. Weinstein, E. P. O’Reilly, A. R. Adams, and P.J. Klar, “Pressure andk·pstudies of band parameters in dilute-N GaInNAs/GaAs MQWs,”Physica Status Solidi (b)235, 384 (2003)S.J. Sweeney, S.R. Jin,

S. Tomić, A.R. Adams, T. Higashi, H. Riechert, and P. J. A. Thijs, “Hydrostatic pressure dependence of recombination mechanisms in GaInNAs, InGaAsP and AlGaInAs 1.3 µm quantum well lasers”,Physica Status Solidi (b)235, 474 (2003)G. Knowles,

S. Tomić, S. Jin, R. Fehse, S. J. Sweeney, T. E. Sale, and A. R. Adams, “Gain-cavity alignment profiling of 1.3 µm emitting GaInNAs vertical cavity surface emitting lasers (VCSELs) using high pressure techniques”,Physica Status Solidi (b)235, 480 (2003)S. R. Jin, S. J. Sweeney,

S. Tomić, A. R. Adams, and H. Riechert, “Quantifying pressure-dependent recombination currents in GaInNAs lasers using spontaneous emission measurements”,Physica Status Solidi (b)235, 486 (2003)A. Lindsay,

S. Tomić, and E. P. O’Reilly, “Derivation of a 10-bandk·pmodel for dilute nitride semiconductors”,Solid State Electronics47, 443 (2003)R. Fehse, A.R. Adams, S.J. Sweeney,

S. Tomić, H. Riechert, and A. Ramakrishnan, “Carrier recombination processes in 1.3μm GaInNAs edge-emitting lasers”,Solid State Electronics47, 501 (2003).P.J. Klar, H. Grüning, W. Heimbrodt, J. Koch, W. Stolz,

S. Tomić, and E. P. O’Reilly, “Monitoring the strong non-parabolicity of the conduction band in (Ga,In)(N,As)/GaAs quantum wells”,Solid State Electronics47, 437 (2003)S.A. Choulis, T.J.C. Hosea,

S. Tomić, M. Kamal-Saadi, A. R. Adams, E.P. O’Reilly, B.A.Weinstein, and P. J. Klar, “Electronic structure of InGaAsN/GaAs multiple quantum wells in the dilute-N regime from pressure andk·pstudies”,Physical ReviewB66, 165321 (2002).D. Indjin,

S. Tomić, Z. Ikonić, P. Harrison, R. W. Kelsall, V. Milanović, and S. Kočinac, “Gain-maximized GaAs/AlGaAs quantum cascade laser with digitally graded active region”,Applied Physics Letters81, 2163 (2002).S. Kocinac,

S. Tomić, Z. Ikonić and V. Milanović, “On the Interdiffusion-based Quantum Cascade Laser”, IEEEPhotonics Technology Letters14, 1067 (2002).S. Kocinac,

S. Tomić, Z. Ikonić and V. Milanović, “Gain Optimization in Electrically Pumped AlGaAs Quantum Cascade Laser”,Journal of the Optical Society ofAmericaB19, 2357 (2002).R. Fehse,

S. Tomić, A. R. Adams, S. J. Sweeney, E. P. O’Reilly, A. Andreev and H. Riechert, “A Quantitative Study of Radiative, Auger and Defect Related Recombination Processes in 1.3mm GaInNAs-based Quantum-Well Lasers,” IEEESelected Topics in Quantum Electronics8, 801 (2002)(InvitedPaper).

S. Tomić, D. Indjin, Z. Ikonić and V. Milanović, “Digitally-graded active region for optically pumped intersubband lasers and nonlinear wavelength converters”,Journal of Applied Physics (Communications)91, 9423 (2002).

S. Tomić, Z. Ikonić and V. Milanović, “Interdiffusion-based optimal quantum well profile shaping for unipolar quantum fountain lasers”,Journal of Applied Physics91, 4801 (2002).E.P. O’Reilly, A. Lindsay,

S. Tomićand M. Kamal-Saadi, Tight-binding andk·pmodels for the electronic structure of Ga(In)NAs and related alloys,Semiconductor Science and Technology17, 870 (2002)(.Review)P.J. Klar, H. Grüning, W. Heimbrodt, G. Weiser, J. Koch, K. Volz, W. Stolz, S.W. Koch,

S. Tomić, S.A. Choulis, T.J.C. Hosea, E.P. O'Reilly, M. Hofmann, J. Hader, and J.V. Moloney, “Interband transitions of quantum wells and device structures containing Ga(N,As) and (Ga,In)(N,As)”,Semiconductor Science and Technology17, 830 (2002)(.Review)

S. Tomićand E.P. O’Reilly, “Gain Characteristics of Ideal Dilute Nitride Quantum Well Lasers”,Physica E13, 1102 (2002)

S. Tomić, V. Milanović and Z. Ikonić, “Gain Optimization in Optically Pumped Unipolar Quantum Well Lasers”,Physica E13, 862 (2002)H. Grüning, P.J. Klar, W. Heimbrodt, J. Koch, W. Stolz, A. Lindsay,

S. Tomićand E.P. O'Reilly, “N-composition and pressure dependence of the inter band transitions of Ga(N,As)/GaAs quantum wells”,High Pressure Research22, 293 (2002)

S. S. Tomićand E. V. Samsonov, “Analytical Description of Stripping Foil Extraction from Isochronous Cyclotrons”,Physical ReviewE65, 036504 (2002).

S. Tomić, V. Milanović and Z. Ikonić, “Gain Optimization in Optically Pumped AlGaAs Unipolar Quantum-Well Lasers”, IEEEJournal of Quantum Electronics37, 1337 (2001).

S. Tomić, V. Milanović and Z. Ikonić. “Optimization of gain in intersubband quantum well lasers by super-symmetry”,Physical ReviewB62, 16681 (2000).

S. Tomić, M. Tadić, V. Milanović, and Z. Ikonić, “The Optimization of Optical Gain in Intersubband Quantum Well Lasers”,Journal of Applied Physics87, 7965 (2000)

S. Tomić, V. Milanović, M. Tadić, and Z. Ikonić, “Gain optimization in intersubband quantum well lasers by inverse spectral theory”,Solid State Communications113, 221 (2000)B. P. Bojović, J. Elazar and

S. S. Tomić, “Application of a precise fiber dee position measurement system in the cyclotron RF system design”,Nuclear Instruments & MethodsA425, 460 (1999)

S. Tomić, V. Milanović and Z. Ikonić, “Quantum well shape tailoring via inverse spectral theory: Optimizing the resonant second harmonic generation”,Journal of Physics: Condensed Matter10, 6523 (1998)

S. Tomić, V. Milanović and Z. Ikonić, “Quantum well shape tailoring via inverse spectral theory: Optimization of nonlinear optical rectification”,Physics LettersA238, 385 (1998)

S. Tomić, V. Milanović and Z. Ikonić, “Optimization of Nonlinear Optical Rectification in Parabolic Quantum Wells using the Supersymmetric Quantum Mehanics”,Solid State Phenomena61-62, 215 (1998).

S. Tomić, V. Milanović and Z. Ikonić, “Optimization of nonlinear optical rectification in quantum wells using the supersymmetric quantum mechanics”,Optics Communication143, 214 (1997)

S. Tomić, V. Milanović and Z. Ikonić. “Optimization of Intersubband Resonant Second-Order Susceptibility in Asymmetric Graded AlGaAs Quantum Wells using the Supersymmetric Quantum Mehanics”,Physical Review B56, 1033 (1997).

## Promotional Press

S. Tomić, A.G. Sunderland and I.J. Bush, “A parallel multi-bandk∙pcode for the electronic structure of semiconductor quantum dots,” Capability Computing, issue 8, Autumn (2006).

S. Tomić, A.G. Sunderland and I.J. Bush, “A Parallel Multi-BandCode for the Electronic Structure of Semiconductor Quantum Dots” CCLRC CSED Frontiers 2006, (2006).k∙p

S. Tomić, “Band Structure of the Dilute Nitrogen Quantum Dots by 10-Bandk∙pTheory” CCLRC CSED Frontiers 2005, (2005).

S. Tomić, B.G. Searle and A. Wander, “New tools for the analysis of EXAFS: The DL_EXCURV package”, CCLRC SRS Annual Report 2003-2004, p. 16-17 (2004).

## Complete list of publications can be found here!

## Talks

“Electronic and Optical Properties of Dilute Nitrogen Quantum Dots”, Centre for Electronic Devices and Materials, Sheffield Hallam University, UK, 9 October 2006 (invited seminar)S. Tomić

“Electronic and Optical Properties of Dilute Nitrogen Quantum Dots”, The Lord Rank Prize Funds, Symposium on Dilute Nitride Semiconductor Materials and Optoelectronic Devices, Storrs Hall Hotel, Windemere, Cumbria, UK, 26-28 June 2006 (invited talk)S. Tomić

“Electronic Structure of the Dilute Nitrogen Quantum Dots”, Advanced Technology Institute, University of Surrey, Guildford, UK, 9 June 2006 (invited seminar)S. Tomić

“Electronic Structure of the Dilute Nitrogen Quantum Dots”, Dilute nitrogen GaInNAs material: physics and devices one day meeting, special session of the Semiconductor and Integrated Optoelectronics Conference (SIOE ‘06), University of Cardiff, UK, 10 April 2006 (oral presentation)S. Tomić

“Electronic Structure of the Dilute Nitrogen Quantum Dots”, Tyndall National Institute, Cork, Ireland, 27 February 2006 (invited seminar)S. Tomić

“Electronic Structure of the Dilute Nitrogen Quantum Dots”, London Centre for Nanotechnology, University College London, UK, 2 December 2005 (invited seminar)S. Tomić

Band structure of the InGaAsN/GaAs(N) quantum dots by 10-bandS. Tomić, “k∙ptheory”, 5th International Conference of Numerical Simulation of Optoelectronic Devices (NUSOD ’05) 19-23 September 2005, Berlin, Germany, (oral presentation)

, B.G. Searle and A. Wander, “Status report on DL_EXCURV software”, XAS User Group Meeting 2005, University of Warwick, Coventry, UK (invited talk)S. Tomić

, “Novel quantum structures for optoelectronic devices: dilute nitrides”, CCLRC Daresbury Laboratory- Institute Vinca Belgrade, Video-Link from Daresbury, UK, 16 December 2004 (invited seminar)S. Tomić

“Band structure and laser characteristics of the Ga(In)NAs/GaAs QWs: the theory vs. experiment”, The 20S. Tomić^{th}General Conference of the Condensed Matter Division, European Physical Society, Prague 19-23 July 2004, Czech Republic (invited talk)

and E. P. O’Reilly, “An analytical two-band model for conduction band dispersion and confinement energy in Ga(In)NAs/GaAs quantum well structures”, Condensed Matter and Materials Physics Conference CMMP 2003, 6-9 April 2003, Belfast, Northern Ireland, UK (oral presentation)S. Tomić

“(Ga, In)(As, N): material properties and laser performances”, Department of Physics and Material Sciences Centre, Philipps-University Marburg, Marburg, Germany, 4 October 2002 (invited seminar)S. Tomić

, R. Fehse, S. A. Choulis, E.P. O’Reilly, A.R. Adams, S.J. Sweeney, A.D. Andreev, T.J.C. Hosea and H. Riechert, “Experimental and Theoretical Analysis of the Recombination Processes in GaInNAs 1.3S. Tomićμm Lasers”, 18^{th}IEEE International Semiconductor Laser Conference, Garmisch-Partenkirchen, Germany, Sep./Oct. 2002, (oral presentation)

“Gain Optimization in Optically Pumped Unipolar Quantum Well Lasers”, Institute of Microwaves and Photonics, School of Electronic and Electrical Engineering, University of Leeds, UK, 12 November 2001 (invited seminar)S. Tomić

“Band structure and gain characteristics of ideal dilute nitride quantum well lasers”, Department of Electronic Systems Engineering, University of Essex, UK, 26 September 2001 (invited seminar)S. Tomić

, V. Milanović and Z. Ikonić, “Gain Optimization in Optically Pumped Unipolar Quantum Well Lasers”, Mid infrared (MIR) Network, 5 July 2001, University of Surrey, Guildford, UK, (oral presentation)S. Tomić

, “Electrodes in the central region of the VINCY Cyclotron”, Workshop on the Magnetic Field and Ion Beam Dynamics of the VINCY Cyclotron, Joint Institute of Nuclear Research, Dubna, Russia, 11-15. March 1996, (oral presentation)S. Tomić