Dr. Haijun Liu is an Assistant Professor in the Department of Mechanical Engineering at Temple University. He earned his Ph.D. in Mechanical Engineering from University of Maryland, College Park (UMD) in 2012. Prior to joining Temple University, he was a post-doctoral Research Associate at the National Institute of Standards and Technology (Gaithersburg, MD) and UMD. His area of expertise is in the fundamental science of sensor technology and its applications. In particular, his research focuses on employing new sensing mechanisms inspired by nature, engineering advanced metamaterials, and developing a solid understanding of the pertinent mechanics. Dr. Liu was a Future Faculty Fellow at the A. James Clark School of Engineering of UMD in 2009-2010.

Labs: Listen Lab

Research Interests

  • Bio-Inspired Sensing & Bio-Mechanics
  • Acoustic Metamaterials
  • Theoretical & Experimental Mechanics
  • Shock Wave & Dynamic Pressure Measurement
  • Fiber Optic & MEMS Sensors for Various Applications

Courses Taught




MEE 4422

Mechanical Vibrations


MEE 5110

Special Topics: Engineering Acoustics


MEE 8110

Special Topics


ENGR 2332

Engineering Dynamics


Selected Publications

  • Dong, Q., Bae, H., Zhang, Z., Chen, Y., Wen, Z., Olson, D.A., Yu, M., & Liu, H. (2019). Miniature Fiber Optic Acoustic Pressure Sensors with Air-Backed Graphene Diaphragms. Journal of Vibration and Acoustics, Transactions of the ASME, 141(4). doi: 10.1115/1.4042929

  • Hanson, E., Olson, D.A., Liu, H., Ahmed, Z., & Douglass, K.O. (2018). Towards traceable transient pressure metrology. Metrologia, 55(2), pp. 275-283. doi: 10.1088/1681-7575/aaad1b

  • Chen, Y., Liu, H., Zhang, Z., Gupta, A.K., & Yu, M. (2017). Planar photonic crystal based multifunctional sensors: Erratum (Appl. Opt. (2017) 56 (1775-1780) DOI: 10.1364/AO.56.001775). Applied Optics, 56(31), p. 8663. doi: 10.1364/AO.56.008663

  • Chen, Y., Liu, H., Zhang, Z., Gupta, A.K., & Yu, M. (2017). Erratum: Planar photonic crystal based multifunctional sensors: Publisher's note (Applied Optics (2017) 56 (1775-1780) DOI: 10.1364/AO.56.001775). Applied Optics, 56(9), p. 2397. doi: 10.1364/AO.56.002397

  • Chen, Y., Liu, H., Zhang, Z., Gupta, A.K., & Yu, M. (2017). Planar photonic crystal based multifunctional sensors. Applied Optics, 56(6), pp. 1775-1780. doi: 10.1364/AO.56.001775

  • Sterbing-D'Angelo, S.J., Liu, H., Yu, M., & Moss, C.F. (2016). Morphology and deflection properties of bat wing sensory hairs: Scanning electron microscopy, laser scanning vibrometry, and mechanics model. Bioinspiration and Biomimetics, 11(5). doi: 10.1088/1748-3190/11/5/056008

  • Ganye, R., Chen, Y., Liu, H., Bae, H., Wen, Z., & Yu, M. (2016). Characterization of wave physics in acoustic metamaterials using a fiber optic point detector. Applied Physics Letters, 108(26). doi: 10.1063/1.4955058

  • Zhang, Z., Chen, Y., Liu, H., Bae, H., Olson, D.A., Gupta, A.K., & Yu, M. (2015). On-fiber plasmonic interferometer for multiparameter sensing. Optics Express, 23(8), pp. 10732-10740. doi: 10.1364/OE.23.010732

  • Liu, H., Olson, D.A., Douglass, K.O., & Yu, M. (2015). Fiber optic graphene sensors for dynamic pressure measurements. Optical Sensors, Sensors 2015, p. 316p. doi: 10.1364/SENSORS.2015.SeS4C.3

  • Bae, H., Yun, D., Liu, H., Olson, D.A., & Yu, M. (2014). Hybrid miniature fabry-perot sensor with dual optical cavities for simultaneous pressure and temperature measurements. Journal of Lightwave Technology, 32(8), pp. 1585-1593. doi: 10.1109/JLT.2014.2308060

  • Liu, H., Olson, D.A., & Yu, M. (2014). Modeling of an air-backed diaphragm in dynamic pressure sensors: Effects of the air cavity. Journal of Sound and Vibration, 333(25), pp. 7051-7075. doi: 10.1016/j.jsv.2014.07.004

  • Chen, Y., Liu, H., Reilly, M., Bae, H., & Yu, M. (2014). Enhanced acoustic sensing through wave compression and pressure amplification in anisotropic metamaterials. Nature Communications, 5. doi: 10.1038/ncomms6247