Dr. Khaled Gasmi
Associate Professor

Brief Research Interests

Laser spectroscopy, molecular-beam spectroscopy, ultrafast molecular dynamics, semiconductor lasers, optical instrumentation, trace-gas sensing, and environmental monitoring.

Research Areas

Laser Spectroscopy and Molecular Dynamics; Molecular-Beam Spectroscopy; and Laser-Based Sensing and Instrumentation.

Office: Building 6, Room 232
Telephone: +966 13 860 2275
Email: kgasmi@kfupm.edu.sa
Laboratory: Laser Research Laboratory
Affiliated Center: Interdisciplinary Research Center for Intelligent Manufacturing and Robotics

Research Interests

Dr. Khaled Gasmi’s research focuses on optics and photonics, particularly laser physics and technology, laser spectroscopy, molecular-beam spectroscopy, and the molecular dynamics of chemical reactions. His work encompasses resonance-enhanced multiphoton ionization (REMPI), time-of-flight mass spectrometry (TOF-MS), and ultrafast dynamics.

His research also addresses laser-based sensing and diagnostics using laser-induced breakdown spectroscopy (LIBS), light detection and ranging (LIDAR), tunable diode laser absorption spectroscopy (TDLAS), differential optical absorption spectroscopy (DOAS), and gas in scattering media absorption spectroscopy (GASMAS). His expertise further extends to optical instrumentation and electronics, including external-cavity diode lasers and laser rangefinders.

Biographical Sketch

Dr. Khaled Gasmi is an Associate Professor in the Department of Physics at King Fahd University of Petroleum & Minerals (KFUPM) in Dhahran, Saudi Arabia. He is also affiliated with KFUPM’s Interdisciplinary Research Center for Intelligent Manufacturing and Robotics.

His academic and research career has included appointments at the Centre de Développement des Technologies Avancées (CDTA) in Algeria and the Instituto Pluridisciplinar at Universidad Complutense de Madrid (UCM) in Spain, as well as a teaching appointment at Saint Louis University–Madrid Campus. His industry experience includes serving as a scientific consultant to MedArt A/S, a Danish manufacturer of medical laser systems. He has also undertaken research visits at the Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy in Germany.

Major Achievements

• Developed an electronic laser range-finding system capable of simultaneously measuring distances to two targets using a single photodetection and signal-processing chain.
• Demonstrated the first application of femtosecond pump–probe spectroscopy combined with photoelectron–photoion coincidence detection to investigate the energetics and ultrafast dynamics of photoinitiated intracluster harpooning reactions in metal–molecule complexes.
• Conducted the first isotope-specific REMPI–TOF-MS investigation of CaH and CaD, determined the spin-splitting parameters of the CaD B²Σ⁺ state for the first time, and identified a previously unrecognized perturbation in CaH.
• Established the first correlation between oxygen absorption-line broadening measured by GASMAS and pore sizes determined through gas-adsorption measurements.
• Introduced a novel trace-NO₂ detection method based on direct absorption spectroscopy using a tunable, multimode blue diode laser.

Awards and Honors

Dr. Khaled Gasmi earned his PhD with cum laude distinction.

Selected Publications

Stert, V., Farmanara, P., Ritze, H. H., Radloff, W., Gasmi, K., & González-Ureña, A. (2001). Femtosecond time-resolved electron spectroscopy of the intracluster reaction in BaFCH₃. Chemical Physics Letters, 337(4–6), 299–305. https://doi.org/10.1016/S0009-2614(01)00218-4

Gasmi, K., Al-Tuwirqi, R. M., Skowronek, S., Telle, H. H., & González-Ureña, A. (2003). Rotationally resolved (1 + 1′) resonance-enhanced multiphoton ionization (REMPI) of CaR (R = H, D) in supersonic beams. The Journal of Physical Chemistry A, 107(50), 10960–10968. https://doi.org/10.1021/jp036351s

Al-Saudi, A., Aljalal, A., Al-Basheer, W., Gasmi, K., & Qari, S. (2020). Pore size assessment using gas in scattering media absorption spectroscopy and gas adsorption. Applied Optics, 59(4), 1130–1135. https://doi.org/10.1364/AO.381730

Gasmi, K., Aljalal, A., & Al-Basheer, W. (2024). External cavity diode laser in Littrow configuration with narrowband emission at 448 nm for NO₂ gas detection. Optical Engineering, 63(9), 096102. https://doi.org/10.1117/1.OE.63.9.096102

Gasmi, K., Aljalal, A., & Al-Basheer, W. (2026). Experimental investigation of the effect of diffraction gratings on the performance of a blue-emitting external-cavity diode laser. The European Physical Journal Plus, 141(3), Article 243. https://doi.org/10.1140/epjp/s13360-026-07483-1