Faculty Profile

Harley T Johnson

Mechanical Science and Engineering
Harley T Johnson
Harley T Johnson
Professor, Kritzer Faculty Scholar
362B Mechanical Engineering Bldg
1206 W. Green
Urbana Illinois 61801
(217) 265-5468

Primary Research Area

  • Solid Mechanics

Education

  • Ph.D. Engineering Brown University 1999
  • Sc.M. Applied Math Brown University 1998
  • Sc.M. Engineering Brown University 1996
  • B.E.S.M. Eng. Sci. and Mech. Georgia Institute of Technology 1994

Academic Positions

  • Professor, Department of Mechanical Science and Engineering, UIUC, August 16, 2011-date
  • Associate Head for Graduate Programs, Department of Mechanical Science and Engineering, UIUC, August 16, 2011-August 15, 2014
  • Kritzer Faculty Scholar, Department of Mechanical Science and Engineering, UIUC, 2010-date
  • Associate Professor, Department of Mechanical Science and Engineering, UIUC, August 16, 2006-August 15, 2011
  • Cannon Faculty Scholar, Department of Mechanical and Industrial Engineering, UIUC, 2003--2010
  • Assistant Professor, Department of Mechanical and Industrial Engineering, UIUC, 2001-2006
  • Assistant Professor, Department of Aerospace and Mechanical Engineering, Boston University, Mar. 1999-Aug. 2001

Research Statement

Professor Johnson studies the mechanics of electronic and photonic materials, the mechanics of nanostructures, and optical properties of materials.￿ His group works on applications in many areas, including solar energy, microelectronics, sensing and detection, and materials processing.￿ Their work relies on atomistic and continuum modeling methods to simulate multiphysics phenomena, with the goal of helping to design and interpret experiments. Professor Johnson and his research group study such topics as: mechanics of quantum dots, including the effects of stress on their formation and properties; the development of stress in MEMS devices and microelectronic materials due to ion-bombardment processing; dislocations in electronic materials; the electrical properties of deformed carbon nanotubes; nanoscale surface instabilities; and nanophotonic design of surfaces, coatings, and microstructures.

Research Interests

  • Mechanics of Soft Materials
  • Optical Properties of Materials
  • Mechanics of Photonic Materials
  • Mechanics of Nanostructures
  • Micro- and Nanomechanics of Electronic Materials

Research Areas

  • Applied Physics
  • Computation and Applied Math
  • Energy
  • Manufacturing
  • Security and Defense
  • Solid Mechanics

Selected Articles in Journals

  • Mackay, K. K., J. B. Freund, and H. T. Johnson, ￿Hydrogen recombination rates on silica from atomic-scale calculations,￿ Journal of Physical Chemistry C, 120, 24137-24147, 2016.
  • Lin, T.-W., L. P. Rowe, A. J. Kaczkowski, G. P. Horn, and H. T. Johnson, ￿Polarized light emission from grain boundaries in photovoltaic silicon,￿ Extreme Mechanics Letters, 9, 397-404, 2016.
  • McGuigan, B., P. Pochet, and H. T. Johnson, ￿Critical thickness for interface misfit dislocation formation in two-dimensional materials,￿ Physical Review B, 214103, 2016.
  • Lin, T.-W., L. P. Rowe, A. J. Kaczkowski, G. P. Horn, and H. T. Johnson, "Polarization-resolved imaging for both photoelastic and photoluminescence characterization of photovoltaic silicon wafers," Experimental Mechanics, 56, 1339-1350, 2016.
  • Das, K., J. B. Freund, and H. T. Johnson, ￿Erosive-thermal transition in high-flux focused ion beam nanomachining of surfaces,￿ Extreme Mechanics Letters, 7, 121-125, 2016.
  • Chen, H., A. M. Bhuiya, Q. Ding, H. T. Johnson, and K. C. Toussaint, Jr., ￿Towards do-it-yourself planar optical components using plasmon-assisted etching,￿ Nature Communications, 7, 10468, 2016.
  • Bronsgeest, M. S., N. Bendiab, S. Mathur, A. Kimouche, H. T. Johnson, J. Coraux, and P. Pochet, ￿Strain relaxation in CVD graphene: wrinkling with shear lag,￿ Nano Letters, 15, 5098-5105, 2015.
  • Das, K., H. T. Johnson, and J. B. Freund, "Atomic-scale thermocapillary flow in focused ion-beam (FIB) milling," Physics of Fluids, 27, 018505, 2015.
  • Das, K., J. B. Freund, and H. T. Johnson, "Mechanisms of material removal and mass transport in focused ion beam nanopore formation," Journal of Applied Physics, 117, 085304, 2015.
  • Lin, T.-W., G. P. Horn, and H. T. Johnson, "Quantitative infrared photoelasticity of silicon photovoltaic wafers using a discrete dislocation model," Journal of Applied Mechanics, 82, 011001, 2015.
  • Das, K., J. B. Freund, and H. T. Johnson, ￿A FIB induced boiling mechanism for rapid nanopore formation,￿ Nanotechnology, 25, 035303, 2014.
  • Krishnan, D. and H. T. Johnson, ￿Light-induced deformation in a liquid crystal elastomer photonic crystal,￿ Journal of the Mechanics and Physics of Solids, 62, 48-56, 2014.
  • Lin, T.-W., O. Elkhatib, J. Makinen, M. Palokangas, H. T. Johnson, and G. P. Horn, ￿Residual stresses at cavity corners in silicon-on-insulator bonded wafer pairs,￿ Journal of Micromechanics and Microengineering, 23, 095004, 2013.
  • Semichaevsky, A. V. and H. T. Johnson, "Carrier transport in a quantum dot solar cell using semiclassical and quantum mechanical models," Solar Energy Materials and Solar Cells, 108, 189-199, 2013.
  • Hossain, M. Z. and H. T. Johnson, "Alloying and nanostructuring effects on electron dependent thermoelectric properties in Si/Si1-xGex," Applied Physics Letters, 100, 253901, 2012.
  • Hossain, M. Z., J. B. Freund, and H. T. Johnson, "Ion Impact Energy Distribution and Sputtering of Si and Ge," Journal of Applied Physics, 111, 103513, 2012.
  • Inzinga, R. A., T.-W. Lin, M. Yadav, H. T. Johnson, and G. P. Horn, "Characterization and Control of Residual Stress and Curvature in Anodically Bonded Devices and Substrates with Etched Features," Experimental Mechanics, 52, 637-648, 2012.
  • Bhandakkar, T. K. and H. T. Johnson, "Diffusion Induced Stresses in Buckling Battery Electrodes," Journal of the Mechanics and Physics of Solids, 60, 1103-1121, 2012.
  • Kim, S., Y. Su, A. Mihi, S. Lee, Z. Liu, T. K. Bhandakkar, J. Wu, J. B. Geddes III, H. T. Johnson, Y. Zhang, J.-Ki Park, P. V. Braun, and J. A. Rogers, "Imbricate Scales as a Design Construct for Microsystems Technologies," Small, 8, 901-906, 2012.
  • Hossain, M. Z., K. Das, J. B. Freund, and H. T. Johnson, ￿Ion Impact Crater Asymmetry Determines Surface Ripple Orientation￿ Applied Physics Letters, 99, 151913, 2011.
  • Huang, S., A. V. Semichaevsky, L. Webster, H. T. Johnson, and R. S. Goldman, ￿Influence of Wetting Layers and Quantum Dot Size Distribution on Intermediate Band Formation in InAs/GaAs Superlattices,￿ Journal of Applied Physics, 110, 073105, 2011.
  • Semichaevsky, A. V., R. S. Goldman, and H. T. Johnson, ￿Linking Computational and Experimental Studies of III-V Quantum Dots for Optoelectronics and Photovoltaics,￿ JOM: Journal of the Minerals, Metals, and Materials Society, 63, 20-26, 2011.
  • Semichaevsky, A. V., H. T. Johnson, J. Yoon, R. Nuzzo, and J. A. Rogers, "Theory for Optimal Design of Waveguiding Light Concentrators in Photovoltaic Microcell Arrays," Applied Optics, 50, 2799-2808, 2011.
  • Yoon, J., A. V. Semichaevsky, L. Li, R. Nuzzo, H. T. Johnson, and J. A. Rogers, "Flexible Concentrator Photovoltaics Based on Microscale Silicon Solar Cells Embedded in Luminescent Waveguides," Nature Communications, 2, 343, 2011.
  • Dasika, V. D., A. V. Semichaevsky, J. P. Petropoulos, J. C. Dibbern, A. M. Dangelewicz, M. Holub, P. K. Bhattacharya, J. M. O. Zide, H. T. Johnson, and R. S. Goldman, "Influence of Mn Dopants on InAs/GaAs Quantum Dot Electronic States," Applied Physics Letters, 98, 141907, 2011.
  • Semichaevsky, A. V., H. T. Johnson, K.-H. Low, D. Paul, A. Chandra, and A. Bastawros, "Focused Electric Field-induced Ion Transport: Experiments and Modeling," Electrochemical and Solid State Letters, 13, D100-D103, 2010.
  • Hossain, M. Z. and H. T. Johnson, "Effects of Composition, Strain, and Atomic Disorder on Optical Phonon Frequencies in Si1-xGex," Journal of Applied Physics, 107, 073515, 2010.
  • Hossain, M. Z., N. V. Medhekar, V. B. Shenoy, and H. T. Johnson, ￿Enhanced Quantum Confinement due to Nonuniform Composition in Alloy Quantum Dots,￿ Nanotechnology, 21, 095401, 2010.
  • Arpin, K. A., A. Mihi, H. T. Johnson, A. J. Baca, J. A. Rogers, J. A. Lewis, and P. V. Braun, ￿Multidimensional Architectures for Functional Optical Devices,￿ Advanced Materials, 22, 1084-1101, 2010.
  • Zhang, X., M. Gharbi, P. Sharma, and H. T. Johnson, "Quantum Field Induced Strains in Nanostructures and Propects for Optical Actuation," International Journal of Solids and Structures, 46, 3810-3824, 2009.
  • Krishnan, D. and H. T. Johnson, "Optical Properties of Two Dimensional Polymer Photonic Crystals after Deformation Induced Pattern Transformations," Journal of the Mechanics and Physics of Solids, 57, 1500-1513, 2009.
  • Kibey, S., L. L. Wang, J. B. Liu, D. D. Johnson, H. T. Johnson, and H. Sehitoglu, ￿Prediction of Twinning Stresses in FCC Alloys and the Effect of Solutes: Application to Cu-Al Alloys,￿ Physical Review B, 79, 214202, 2009.
  • Hossain, M. Z., J. B. Freund, and H. T. Johnson, ￿Improved Calculation of Silicon Sputter Yield via First Principles Derived Interatomic Potential,￿ Nuclear Instruments and Methods in Physics Research, B, 267, 1061-1066, 2009.
  • Kalyanasundaram, N., J. B. Freund, and H. T. Johnson, ￿Multiscale Crater Function Model for Ion-Induced Pattern Formation in Silicon,￿ Journal of Physics: Condensed Matter, 21, 224018, 2009.
  • Shir, D., H. Liao, S. Jeon, D. Xiao, H. T. Johnson, G. R. Bogart, K. H. A. Bogart, and J. A. Rogers, ￿Three-Dimensional Nanostructures Formed by Single Step, Two-Photon Exposures Through Elastomeric Penrose Quasicrystal Phase Masks,￿ Nano Letters, 8, 2236-2244, 2008.
  • Ghazisaeidi, M., J. B. Freund, and H. T. Johnson, ￿Statistical Characterization of Surface Defects Created by Ar Ion Bombardment of Crystalline Silicon,￿Journal of Applied Physics, 104, 054304, 2008.
  • Kalyanasundaram, N., M. Ghazisaeidi, J. B. Freund, and H. T. Johnson, "Single Impact Crater Functions for Ion Bombardment of Silicon," Applied Physics Letters, 92, 131909, 2008.
  • Xiao, D. and H. T. Johnson, ￿Approximate Cloaking Effect in an Axisymmetric Silicon Photonic Crystal Structure,￿ Optics Letters, 33, 860-862, 2008.
  • Zubaer Hossain, M., J. B. Freund, and H. T. Johnson, ￿Differential Sputter Yields in Si1-xGex,￿ Journal of Applied Physics, 103, 073508, 2008.
  • Frei, W. R., K. D. Choquette, and H. T. Johnson, ￿Optimization of a Single Defect Photonic Crystal Laser Cavity,￿ Journal of Applied Physics, 103, 033102, 2008.
  • You, J. H., J.-Q. Lu, and H. T. Johnson, ￿Atomistically Informed Electrostatic Model of an Edge Dislocation in a Complex Crystalline Material,￿ Mathematics and Mechanics of Solids, 13, 267-291, 2008.
  • Frei, W. R., H. T. Johnson, and D. A. Tortorelli, ￿Optimization of Photonic Nanostructures,￿ Computer Methods in Applied Mechanics and Engineering, 197, 3410-3416, 2008.
  • Kalyanasundaram, N., M. C. Wood, J. B. Freund, and H. T. Johnson, ￿Stress Evolution to Steady State in Ion-bombardment of Silicon,￿ Mechanics Research Communications, 35, 50-56, 2008.
  • Jiang, H., M. F. Yu, J.-Q. Lu, Y. Huang, H. T. Johnson, X.-G. Zhang, and P. Ferreira, ￿Carbon Nanotube Electronic Displacement Encoder with Sub-nanometer Resolution,￿ Journal of Computational and Theoretical Nanoscience, 4:3, 574-577, 2007.
  • Zhang, X., P. Sharma, and H. T. Johnson, ￿Quantum Confinement Induced Strain in Quantum Dots,￿ Physical Review B, 75:15, 155319, 2007. [Subsequently selected to appear in Virtual Journal of Nanoscale Science & Technology, 15:17, 2007.]
  • You, J. H. and H. T. Johnson, ￿Effect of Threading Edge Dislocations on the Photoluminescence Spectrum in n-type Wurtzite GaN,￿ Physical Review B, 76:11, 155319, 2007.
  • You, J. H. and H. T. Johnson, ￿Effect of Screw Dislocation Density on Optical Properties in n-type Wurtzite GaN,￿ Journal of Applied Physics, 101, 023516, 2007.
  • Frei, W. R., D. A. Tortorelli, and H. T. Johnson, ￿A Geometry Projection Method for Optimizing Photonic Nanostructures,￿ Optics Letters, 32, 77-79, 2007.
  • Lee, Y. J., C. E. Heitzman, W. R. Frei, H. T. Johnson, and P. V. Braun, ￿Tranformation of Hydrogel-based Inverse Opal Photonic Sensors from FCC to L1(1) During Swelling,￿ Journal of Physical Chemistry B, 110:39, 19300-19306, 2006.
  • You, J. H., J.-Q. Lu, and H. T. Johnson, ￿Electron Scattering Due to Threading Edge Dislocations in N-type,￿ Journal of Applied Physics, 99:3, 033706, 2006.
  • Lu, J.-Q., H. T. Johnson, V. D. Dasika, and R. S. Goldman, ￿Moments-based Tight-binding Calculations of Local Electronic Structure in InAs/GaAs Quantum Dots for Comparison to Experimental Measurements,￿ Applied Physics Letters, 88, 053109, 2006. [Subsequently selected to appear in Virtual Journal of Nanoscale Science & Technology, 13:6, 2006.]
  • Kalyanasundaram, N., M. C. Moore, J. B. Freund, and H. T. Johnson, ￿Stress Evolution Due to Medium-energy Ion Bombardment of Silicon,￿ Acta Materialia, 54, 483-491, 2006.
  • Kalyanasundaram, N., J. B. Freund, and H. T. Johnson, ￿Atomistic Determination of Continuum Mechanical Properties of Ion-bombarded Silicon,￿ ASME Journal of Engineering Materials and Technology, 127, 457-461, 2005.
  • Lu, J.-Q., J. Wu, W. Duan, B.-L. Gu, and H. T. Johnson, ￿Structural Trends Interpretation of the Metal-to-semiconductor Transition in Deformed Carbon Nanotubes,￿ Journal of Applied Physics, 97, 114314, 2005.
  • Schuyler, A. D., G. S. Chirikjian, J.-Q. Lu, and H. T. Johnson, ￿Random Walk Statistics in Moments-based O(N) Tight-binding and Applications in Carbon Nanotubes,￿ Physical Review E, 71, 146701, 2005.
  • Frei, W. R., D. A. Tortorelli, and H. T. Johnson, ￿Topology Optimization of a Photonic Crystal Waveguide Termination to Maximize Directional Emission,￿ Applied Physics Letters, 86, 111114, 2005.
  • Moore, M. C., N. Kalyanasundaram, J. B. Freund, and H. T. Johnson, ￿Structural and Sputtering Effects of Medium Energy Ion Bombardment of Silicon,￿ Nuclear Instruments and Methods in Physics Research B, 225, 241-255, 2004.
  • Frei, W. R. and H. T. Johnson, ￿Finite Element Analysis of Disorder Effects in Photonic Crystals,￿ Physical Review B, 70, 165116, 2004. (Subsequently selected to appear in Virtual Journal of Nanoscale Science & Technology, 10:20, 2004.)
  • Johnson, H. T., B. Liu, and Y. Huang, ￿Electron Transport in Deformed Carbon Nanotubes,￿ ASME Journal of Engineering Materials and Technology, 126, 222-229, 2004.
  • Bose, R. and H. T. Johnson, ￿Coulomb Interaction Energy in Optical and Quantum Computing Applications of Self-assembled Quantum Dots,￿ Microelectronic Engineering, 75:1, 43-53, 2004.
  • Suh, A. Y., N. Yu, K. M. Lee, A. A. Polycarpou, and H. T. Johnson, ￿Crystallite Coalescence during Film Growth Based on Improved Contact Mechanics Adhesion Models,￿ Journal of Applied Physics, 96:3, 1348-1359, 2004.
  • Liu, B., H. Jiang, H. T. Johnson, and Y. Huang, ￿The Influence of Mechanical Deformation on the Electrical Properties of Single Wall Carbon Nanotubes,￿ Journal of the Mechanics and Physics of Solids, 52, 1-26, 2004.
  • Johnson, H. T., R. Bose, B. B. Goldberg, and H. D. Robinson, ￿Simulation Evidence for Lateral Excitation Coupling in a Self-assembled Quantum Dot Array,￿ Applied Physics Letters, 82:20, 3382-3384, 2003. (Subsequently selected to appear in Virtual Journal of Nanoscale Science & Technology, 7:21, 2003.)
  • Johnson, H. T., R. Bose, B. B. Goldberg, and H. D. Robinson, ￿Effects of Externally Applied Stress on the Properties of Quantum Dot Nanostructures,￿ International Journal for Multiscale Computational Engineering, 1:1, 33-41, 2003.
  • Zhang, S., H. T. Johnson, G. J. Wagner, W. K. Liu, and K. J. Hsia, ￿Stress Generation Mechanisms in Carbon Thin Films Grown by Ion-beam Deposition,￿ Acta Materialia, 51, 5211-5222, 2003.
  • Johnson, H. T. and R. Bose, ￿Nanoindentation Effect on the Optical Properties of Self-assembled Quantum Dots,￿ Journal of the Mechanics and Physics of Solids, 51, 2085-2104, 2003.
  • Johnson, H. T., V. Nguyen, and A. F. Bower, ￿Simulated Self-Assembly and Optoelectronics Properties of InAs/GaAs Quantum Dot Arrays,￿ Journal of Applied Physics, 92:8, 4653-4663, 2002. (Subsequently selected to appear in Virtual Journal of Nanoscale Science and Technology 6:16, 2002.)
  • Bifano, T. G., H. T. Johnson, P. Bierden, and R. Mali, ￿Elimination of Stress-Induced Curvature in Thin Film Structures,￿ Journal of Microelectromechanical Systems, 11:5, 592-597, 2002.
  • Johnson, H. T. and L. B. Freund, ￿The Influence of Strain on Confined Electronic States in Semiconductor Quantum Structures,￿ International Journal of Solids and Structures, 38, 1045-1062, 2001.
  • Freund, L. B. and H. T. Johnson, ￿Influence of Strain on Functional Characteristics of Nanoelectronic Devices,￿ Journal of the Mechanics and Physics of Solids, 49, 1925-1935, 2001.
  • Aky￿ D., H. T. Johnson, A. Zaslavsky, L. B. Freund, and D. A. Syphers, ￿Inhomogeneous Strain Relaxation in Triple-Barrier ρ-Si/SiGe Nanostructures,￿ Physical Review B, 60:24, 16 597-16 602, 1999.
  • Johnson, H. T., L. B. Freund, C. D. Aky￿d A. Zaslavsky, ￿Finite Element Analysis of Strain Effects on Electronic and Transport Properties in Quantum Dots and Wires,￿ Journal of Applied Physics, 84:7, 3714-3725, 1998.
  • Johnson, H. T. and L. B. Freund, ￿Mechanics of Coherent and Dislocated Island Morphologies in Strained Epitaxial Material Systems,￿ Journal of Applied Physics, 81:9, 6081-6090, 1997.

Professional Societies

  • Society of Engineering Science (SES), member since 2000, Board of Directors 2014-2018
  • American Society of Mechanical Engineers (ASME), member since 1999, fellow since 2012
  • American Physical Society (APS), member since 1997
  • Materials Research Society (MRS), member since 1996

Teaching Honors

  • "List of Teachers Ranked as Excellent by Their Students," Fall '16
  • "List of Teachers Ranked as Excellent by Their Students" Spring '16
  • "List of Teachers Ranked as Excellent by Their Students" Spring '11
  • "List of Teachers Ranked as Excellent by Their Students" Fall '10
  • "List of Teachers Ranked as Excellent by Their Students" Fall '09
  • "List of Teachers Ranked as Excellent by Their Students" Spr. '09
  • ￿List of Teachers Ranked as Excellent by Their Students,￿ Spr. ￿08
  • ￿Incomplete List of Teachers Ranked as Excellent by Their Students,￿ Spr. ￿05
  • ￿Incomplete List of Teachers Ranked as Excellent by Their Students,￿ Spr. ￿04

Research Honors

  • NCSA Faculty Fellow, 2017-2018
  • Invited Professor, Universit￿oseph Fourier, Grenoble, France, 2014-2015
  • Fulbright U.S. Scholar in France, 2014-2015
  • ASME Fellow, 2012
  • Xerox Award for Faculty Research, UIUC College of Engineering, 2011
  • Kritzer Faculty Scholar, Department of Mechanical Science and Engineering, UIUC, 2010-present
  • ASME Thomas J. R. Hughes Young Investigator Award, 2010
  • Cannon Faculty Scholar, Department of Mechanical Science and Engineering, UIUC, 2003-2010
  • NSF Faculty Early Development (CAREER) Award, 2001

Other Honors

  • Graduate Student Council President, Brown University, 1998
  • University Graduate Fellow, Brown University, 1994 - 1995, 1999
  • President￿s Scholar, Georgia Institute of Technology, 1990 - 1994