Associate Professor of Physics
📧 hramezani@tarleton.edu
📞 254-459-5361
📍 Science Building, Room 213B
Research Interests
Quantum Optics
Optics and Photonics
Topological Photonics
Non-Hermitian Physics
Nonlinear Dynamics
Airborn Acoustics
Faculty Research Description
Dr. Ramezani studies how the behavior of light can be fundamentally altered by engineering the interactions between waves, materials, and their environment. A central theme of his research is the development of photonic systems in which localization, transport, transmission, and reflection can be actively controlled rather than fixed by the physical structure alone.
His work combines topology, non-Hermitian physics, nonlinear dynamics, and quantum-optical concepts to create unconventional mechanisms for controlling electromagnetic waves. These include relocating protected optical states within photonic lattices, reshaping wave localization through engineered interactions, and developing high-field photonic structures that redirect intense optical energy through reflection rather than relying primarily on absorption.
The broader goal is to establish new physical principles for adaptive and reconfigurable photonic systems with applications in sensing, communications, optical protection, and emerging quantum technologies. His group combines analytical theory, numerical modeling, and experimental photonics, with undergraduate students participating throughout the research process.
Recent Research Highlight
A recent study from the Ramezani Research Group, published in Physical Review Research (On-demand positioning of topological states via non-Hermitian defects, H Ramezani, Physical Review Research 8 (2), 023074 2026), explores how non-Hermitian physics can be used to control and relocate localized states in wave systems. The work demonstrates that engineered interactions can provide a new way to move and reshape where energy becomes concentrated without relying solely on physically restructuring the system. These results contribute to the broader development of reconfigurable photonic platforms and may have future applications in optical control, sensing, and wave-based technologies.
Faculty Award Highlight – Texas A&M University System Research Excellence Fund
Dr. Hamidreza Ramezani was selected as a 2026–2027 Texas A&M University System Research Excellence Fund Faculty Fellow and received a $100,000 Faculty Fellowship award to support research in advanced photonics and topological wave control. The fellowship supports collaborative research within the Texas A&M University System and the development of new approaches for reconfigurable photonic systems. The award highlights Tarleton State University’s growing participation in system-wide research initiatives in quantum science, photonics, and emerging technologies.
Research Opportunities
Students in the Ramezani Research Group can participate in research involving experimental photonics, fiber-optic sensing, computational physics, nonlinear wave phenomena, topology, and emerging quantum and optical technologies. Students can gain hands-on experience with optical instrumentation, fiber-optic components, numerical simulations, data acquisition, and scientific data analysis. These projects provide opportunities for students to participate in the full research process, from developing an initial idea and building an experiment to presenting results at research symposia and contributing to scientific publications.
Schematic and numerical results for an asymmetric nonlinear resonator chain. The upper diagram shows coupled resonators including specially engineered nonlinear elements, while the plots below compare transmission, reflection, and phase response as the coupling strength is varied.
Student Research Highlight
Dr. Ramezani was awarded $65,000 from the REID office at Tarleton State University to perform research on structural health monitoring. Tarleton State students, supported by this award, are participating in the development of fiber-optic sensing systems for structural health monitoring and related applications. These projects combine physics, optics, engineering, and data analysis to investigate how optical fibers can detect changes such as strain, deformation, or structural damage. Students work directly with experimental equipment, optical sensors, data-acquisition systems, and computational analysis, providing hands-on experience with technologies that have applications in infrastructure monitoring, aerospace, manufacturing, and advanced sensing.
Photonics Laboratory Highlight
The Ramezani Research Group is developing an experimental photonics laboratory at Tarleton State University focused on fiber-optic systems, programmable photonic networks, optical sensing, and advanced wave-control experiments. The laboratory is designed to support both fundamental research and undergraduate training using modern optical instrumentation and telecommunications-band photonic components. The facility will allow students to work directly with technologies used in contemporary photonics research while exploring emerging concepts in reconfigurable, nonlinear, topological, and quantum-inspired optical systems.
Additional Research Background
Dr. Ramezani’s research has also received support from the National Science Foundation and DOD for work in quantum science and photonics. His broader research program spans non-Hermitian and topological photonics, optical sensing, nonlinear wave phenomena, and reconfigurable photonic systems, with an emphasis on connecting fundamental physics with experimentally realizable technologies.