Mechanical Engineering
Hasan Al Babaa headshot

Hasan Al Babaa

Job Title
Visiting Assistant Professor of Mechanical Engineering
Steinmetz Hall 218

Areas of expertise

Vibrations, Structural Dynamics, Wave propagation, Phononic Crystals, Elastic Metamaterials

Research interests

My research interest lies at the intersection of structural dynamics, wave propagation, applied mathematics, and control theory, all with the aim of controlling and reducing mechanical vibrations in dynamical systems. I am interested in studying various classes of optimally engineered materials, such as Metamaterials (MMs) and Phononic Crystals (PnCs), which have structural and/or material periodicity in their design. The key importance of such engineered materials is their ability to enable a plethora of exotic and counter-intuitive physical phenomena beyond the natural capacity of conventional materials. To date, a myriad of applications, including wave directivity and steering, one-way wave transmission, abnormal refractive index, cloaking, and robust wave guides have emerged and been demonstrated theoretically, numerically, and experimentally. Nonetheless, exploiting MMs and PnCs in exciting and extraordinary engineering applications is yet to cease, and they are envisioned to shape the future of structured materials.

Teaching interests

Statics, Dynamics, Applied Mathematics, Vibrations, Strength of materials.


1. H. Al Ba’ba’a, “Zero-frequency corner modes in mechanical graphene”, Wave Motion, 124,103291 (2024).

2. H. Al Ba’ba’a, “Brillouin-zone definition in non-reciprocal Willis monatomic lattices”, JASA Express Letters, 12, 120001 (2023).

3. H. Al Ba’ba’a, C. Willey, V. Chen, A. Juhl, and M. Nouh, “Theory of truncation resonances in continuum rod-based phononic crystals with generally asymmetric unit cells”, Advanced Theory and Simulations, 6(2), 2200700 (2023) [Cover Image].

4. K. H. Lee, H. Al Ba’ba’a, K. Yu, K. Li, Y. Zhang, H. Du, S. F. Masri, and Q. Wang, “Magnetoactive Acoustic Topological Transistors”, Advanced Science, 9, 2201204 (2022).

5. H. Al Ba’ba’a, Z. Lin, and S. Tol, “Metadamping enhancement and tunability via scissor-like electromechanical metamaterials”, Journal of Applied Physics, 130 (18), 184901 (2021).

6. H. Al Ba’ba’a, S. Nandi, T. Singh and M. Nouh, “Uncertainty quantification of tunable elastic metamaterials using polynomial chaos”, Journal of Applied Physics, 127 (11), 015102 (2020) [Featured Article].

7. H. Al Ba’ba’a, J. Callanan and M. Nouh, “Emergence of pseudo-phononic gaps in periodically architected pendulums”, Frontiers in Materials, 6, 119 (2019).

8. H. Al Ba’ba’a, J. Callanan, M. Nouh and T. Singh, “Band gap synthesis in elastic monatomic lattices via input shaping”, Meccanica, 53 (11), 3105–3122 (2018).

9. H. Al Ba’ba’a, M. Nouh and T. Singh, “Formation of local resonance band gaps in finite acoustic metamaterials: A closed-form transfer function model”, Journal of Sound and Vibration, 410, 429-446 (2017).

10. H. Al Ba’ba’a, T. Elgammal and R. Amano, “Correlations of bubble diameter and frequency for air-water system based on orifice diameter and flow rate”, Journal of Fluids Engineering, 138 (11), 114501(1-7) (2016).

Additional media

Academic credentials

B.S., The Hashemite University; M.S., University of Wisconsin – Milwaukee; Ph.D., State University of New York at Buffalo