Journal Articles

  1. Danawe, H., and Tol,  S., Electro-momentum coupling tailored in piezoelectric metamaterials with resonant shunts, APL Materials 11, no. 9, 2023. (© AIP)
  2. Danawe, H., and Tol,  S., Broadband Subwavelength Imaging of Flexural Elastic Waves via Flat Phononic Crystal Lenses, Scientific Reports,  13, Article number: 7310, 2023. (© Nature)
  3. Lin, Z., and Tol,  S., Electroelastic metasurface with resonant piezoelectric shunts for tunable wavefront control, Journal of Physics D: Applied Physics, 56(16), 164001, 2023 (in Special issue on Adaptive Structures and Intelligent Material Systems).(© IOP) 
  4. Danawe, H., Ozevin, D., and Tol,  S., Structurally Embedded Gradient Index Lens for Guided Wave Amplification in Polymers, (under review).
  5. Danawe, H., Li, H., Sun, K., and Tol,  S., Finite-Frequency Topological Maxwell Modes in Mechanical Self-Dual Kagome Lattices, Physics Review Letters, 129, 204302, 2022. (© APS) 
  6. Lin, Z., Zhang, Y., Wang, K.W., and Tol,  S., Anomalous Wavefront Control via Nonlinear Acoustic Metasurface Through Second Harmonic Tailoring and Demultiplexing, Applied Physics Letters, 121, 201703, 2022. (© AIP) 
  7. Danawe, H. and Tol,  S., Experimental Realization of Negative Refraction and Subwavelength Imaging for Flexural Waves in Phononic Crystal Plates, Journal of Sound and Vibration, 518, 116552, 2022. (© Elsevier)
  8. Okudan, G., Danawe, H., Tol, S., and Ozevin, D., Controlling the thickness dependence of torsional wave mode in pipe-like structures with the gradient-index phononic crystal lens, Ultrasonics, 124, 106728, 2022. (© Elsevier)
  9. Danawe, H., Li, H., Al Ba’ba’a, and Tol, S., Existence of Corner Modes in Elastic Twisted Kagome Lattices, Physical Review B, 104(24), L241107, 2021. (© APS) 
  10. Al Ba’ba’a, H., Lin, Z., and Tol,  S., Metadamping Enhancement and Tunability via Scissor-Like Electromechanical Metamaterials, Journal of Applied Physics, 130(18), 184901. (© AIP) 
  11. Lin, Z., Al Ba’ba’a, H., and Tol,  S., Piezoelectric Metastructures for Simultaneous Broadband Energy Harvesting and Vibration Suppression of Traveling Waves, Smart Materials and Structures, 30, 075037, 2021. (© IOP) 
  12. Okudan, G., Danawe, H., Ozevin, D., and Tol, S., Torsional Wave Focusing in Cylindrical Structures with the Conformal Gradient-Index Phononic Crystal Lens, Journal of Applied Physics, 129, 174902, 2021. (© AIP) 
  13. Okudan, G., Danawe, H., Zhang, L., Ozevin, D., and Tol,  S., Enhancing Acoustic Emission Characteristics in Pipe-like Structures with Gradient Index Phononic Crystal Lens, Materials, 14 (6), 2021. 
  14. Lin, Z. and Tol,  S., Elastic Metasurfaces for Full Wavefront Control and Low-Frequency Energy Harvesting, Journal of Vibration and Acoustics, 143 (6), 061005-1, 2021. (© ASME)
  15. Danawe, H., Okudan, G., Ozevin, D., and Tol,  S., Conformal Gradient-Index Phononic Crystal Lens for Ultrasonic Wave Focusing in Pipe-like Structures, Applied Physics Letters, 117, 021906, 2020. (© AIP) 
  16. Tol, S., Degertekin, F. L., and Erturk, A., 3D-Printed Lens for Next-Generation Structure-Borne Wave Focusing and Harvesting, Additive Manufacturing, 29, p.100780, 2019. (© Elsevier)
  17. Tol, S., Degertekin, F. L., and Erturk, A., Structurally-Embedded Reflectors and Mirrors for Elastic Wave Focusing and Harvesting, Journal of Applied Physics, 122, 164503, 2017. (© AIP)
  18. Tol, S., Degertekin, F. L., and Erturk, A., Phononic Crystal Luneburg Lens for Omnidirectional Elastic Wave Focusing and Energy Harvesting, Applied Physics Letters, 111, 013503, 2017. (© AIP)
  19. Tol, S., Xia, Y., Ruzzene, M., and Erturk, A., Self-Bending Elastic Waves and Obstacle Circumventing in Wireless Power Transfer, Applied Physics Letters, 110, 163505, 2017. (© AIP)
  20. Tol, S., Degertekin, F. L., and Erturk, A., Gradient-Index Phononic Crystal Lens-based Enhancement of Elastic Wave Energy Harvesting, Applied Physics Letters, 109, 063902, 2016. (© AIP) (2017 ASME Energy Harvesting Best Paper Award)
  21. Tol, S., Degertekin, F. L., and Erturk, A., Piezoelectric Power Extraction from Bending Waves: Electroelastic Modeling, Experimental Validation, and Performance Enhancement, Wave Motion, 60, pp. 20-34, 2016 (© Elsevier). 
  22. Tol, S. and Ozguven, H. N., Dynamic Characterization of Bolted Joints Using FRF Decoupling and Optimization, Mechanical Systems and Signal Processing, 54-55, pp. 124-138, 2015. (© Elsevier)

Conference Proceedings & Presentations (Full papers or abstracts) 

  1. Danawe, H., Li, H., Al Ba’ba’a, H., and Tol S., Corner Modes in Elastic Twisted Kagome Lattices, Proceedings of the ASME 2021 International Mechanical Engineering Congress & Exposition (IMECE 2021), Virtual, 1-5 November 2021.
  2. Lin, Z., Tol, S., Piezoelectric-Based Active Elastic Metasurface for Low-Frequency Flexural Wavefront Control, Proceedings of the 14th ASME 2021 Conference on International Mechanical Engineering Congress & Exposition (IMECE 2021), Virtual, 1-5 November 2021. (Presentation only)
  3. Danawe, H., Wang, Z., Okudan, G., Ozevin, D., and Tol, S., Experimental Demonstration of the Structurally Embedded Gradient Index Lens for Guided Wave Amplification in Polymer Plates, Proceedings of the 14th ASME Conference on Smart Materials, Adaptive Structures and Intelligent Systems (SMASIS 2021), Virtual, 14-15 September 2021.
  4. Lin, Z., Barghouty N., Tol, S., Multifunctional Electromechanical Metastructures for Energy Harvesting and Vibration Mitigation, Proceedings of the 14th ASME 2021 Conference on Smart Materials, Adaptive Structures and Intelligent Systems (SMASIS 2021), Virtual, 14-15 September 2021.
  5. Danawe, H., and Tol S., Frequency Tunable Phononic Crystal Flat Lens for Subwavelength Imaging, Proceedings of the ASME 2021 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference (IDETC/CIE2021), Virtual, 17-20 August 2021.
  6. Lin, Z. and Tol, S., Elastic Metasurfaces for Full Wavefront Control and Low-Frequency Energy Harvesting. Proceedings of the 14th ASME 2021 Conference on International Design Engineering Technical Conferences and Computers and Information in Engineering Conference (IDETC/CIE 2021), Virtual, 17-19 August 2021. (Spotlight Presentation, Journal of Vibration and Acoustics)
  7. Danawe, H., Wang, Z., Okudan, G., Ozevin, D., and Tol, S., Simultaneous Amplification of Guided Wave Modes in Polymer Pipes via Structurally Embedded Gradient-Index Lens, Proceedings of the 28th SPIE Annual International Symposium on Smart Structures and Materials & Nondestructive Evaluation and Health Monitoring, Virtual, 22-26 March 2021.
  8. Okudan, G., Danawe, H., Ozevin, D., and Tol S., Manipulating the Torsional Mode in Pipe-Like Structures with Mechanical Lens for Extended Propagation Distance, Proceedings of the 28th SPIE Annual International Symposium on Smart Structures and Materials & Nondestructive Evaluation and Health Monitoring, Virtual, 22-26 March 2021.
  9. Danawe, H., Wang, Z., Okudan, G., Ozevin, D., and Tol,  S., Structurally Embedded Gradient- Index Lens for Extended Amplification of Guided Waves in Polymer Pipes, Proceedings of the 13th ASME Conference on Smart Materials, Adaptive Structures and Intelligent Systems (SMASIS 2020), Virtual, 15 September 2020.
  10. Lin, Z. and Tol, S., Elastic Metasurfaces for Low-Frequency Flexural Wavefront Control, Proceedings of the ASME 2020 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference (IDETC/CIE2020), Virtual, 17-19 August 2020.
  11. Danawe, H., Ozevin, D., and Tol,  S., Numerical Investigation of Multi-Mode Guided Wave Focusing in Pipe–Like Structures Using Gradient Index Metamaterial Lens Design, Proceedings of the ASME 2020 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference (IDETC/CIE2020), Virtual, 17-19 August 2020.
  12. Danawe, H., Okudan, G., Ozevin, D., and Tol,  S., Metamaterial-based amplification of multi-mode ultrasonic guided waves toward improved damage detection in pipelines, Proceedings of the 27th SPIE Annual International Symposium on Smart Structures and Materials & Nondestructive Evaluation and Health Monitoring, Virtual, 26-30 April 2020 (Best Student Paper Award, 2nd place).
  13. Okudan, G., Danawe, H., Tol,  S., and Ozevin, D., Reciprocal amplification of wave front for planar or point sources using a metamaterial lens to increase the inspection distance of pipelines, Proceedings of the 27th SPIE Annual International Symposium on Smart Structures and Materials & Nondestructive Evaluation and Health Monitoring, Virtual, 26-30 April 2020.
  14. Tol,  S., Okudan, G., and Ozevin, D., Amplifying Propagating Elastic Waves in Pipe-Like Structures by Metamaterial Lens for the Enhanced Guided Wave Ultrasonics, 9th Conference on Structural Health Monitoring of Intelligent Infrastructure, St Louis, MO, 4-9 August 2019. 
  15. Tol,  S., Okudan, G., and Ozevin, D., Wave focusing in pipe-like structures via gradient-index metamaterial lens toward damage detection and localization, Proceedings of the 26th SPIE Annual International Symposium on Smart Structures and Materials & Nondestructive Evaluation and Health Monitoring, Denver, CO, 3-7 March 2019.
  16. Tol, S., Degertekin, F. L., and Erturk, A., Low-Frequency Elastic Wave Focusing and Harvesting via Locally Resonant Metamaterials, Proceedings of the 10th ASME Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Snowbird, UT, 18-20 September 2017. 
  17. Tol, S., Degertekin, F. L., and Erturk, A., 3D-Printed Lens for Structure-Borne Wave Focusing and Energy Harvesting, Proceedings of the 24th SPIE Annual International Symposium on Smart Structures and Materials & Nondestructive Evaluation and Health Monitoring, Portland, OR, 25-29 March 2017.
  18. Tol, S., Degertekin, F. L., and Erturk, A., Luneburg Lens for Omnidirectional Structure-Borne Wave Focusing and Energy Harvesting, Proceedings of the 24th SPIE Annual International Symposium on Smart Structures and Materials & Nondestructive Evaluation and Health Monitoring,  Portland, OR, 25-29 March 2017.
  19. Tol, S., Vora, F. T., Degertekin, F. L., and Erturk, A., Embedded Elastic Wave Mirrors for Enhanced Energy Harvesting, Proceedings of the IEEE Sensors Conference, Orlando, FL, 30 October – 2 November 2016.
  20. Tol, S., Degertekin, F. L., and Erturk, A., Elastic Wave Focusing Concepts for Dramatically Enhanced Piezoelectric Energy Harvesting, Proceedings of the 27th International Conference on Adaptive Structures and Technologies Conference, Lake George, NY, 3-5 October 2016.
  21. Tol, S.,Degertekin, F. L., and Erturk, A., Dramatic Enhancement of Elastic Wave Energy Harvesting Using a Gradient-Index Phononic Crystal Lens, Proceedings of the 9th ASME Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Stowe, VT, 28-30 September 2016. (Best Student Paper Award)
  22. Tol, S., Degertekin, F. L., and Erturk, A., Modeling and Enhancement of Piezoelectric Power Extraction from One-Dimensional Bending Waves, Proceedings of the 21st SPIE Annual International Symposium on Smart Structures and Materials & Nondestructive Evaluation and Health Monitoring, San Diego, CA, 9-13 March 2014.
  23. Tol, S., Degertekin, F. L., and Erturk, A., Harvesting of Bending Waves in One-Dimensional Infinite Beams Using Resistive-Reactive Circuits, Proceedings of the 6th ASME Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Snowbird, UT, 16-18 September 2013.  
  24. Tol, S. and Ozguven, H. N., Experimental Verication and Improvement of Dynamic Characterization Method for Structural Joints, Topics in Modal Analysis I, Volume 7, Proceedings of the 31st International Modal Analysis Conference (IMAC), Anaheim, CA, 2013.
  25. Tol, S. and Ozguven, H. N., Dynamic Characterization of Structural Joints Using FRF Decoupling, Topics in Modal Analysis I, Volume 5, Proceedings of the 30th International Modal Analysis Conference (IMAC), Jacksonville, FL, 2012.

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