Spectroscopy of materials can be enhanced by the quantum coherent effects. The quantum coherence effects, such as electromagnetically-induced transparency and coherent population trapping, attract attention due to the increasing development of new applications, such as high-precision spectroscopy and large Kerr nonlinearities. Localized plasmon interaction in quantum-confined structures strongly modify the optical and electronic properties with the potential for manipulating light on the nanoscale. Another approach to demonstrate quantum coherent and cooperative effects is to study the Bi-exponential decay of dye fluorescence near the surface of plasmonic metamaterials and core-shell nanoparticles, which has been shown to be an intrinsic property of the coupled system.

Yuri Rostovtsev has demonstrated a new sensing mechanism based on an adiabatically changing electric field interacting with the rotational structure of the molecules with dipole moments. Dr. Rostovtsev has theoretically demonstrated a single low-frequency gas detector that can be used for sensing of gas mixtures with high selectivity, accuracy, and sensitivity. The enhancement of the population difference between corresponding molecular levels and reaching the theoretical maximum of absorption have been shown. Such a gas sensor can be used for many applications, stretching from technology, sciences, control of the environment, biology, and medicine.

What You Will Learn:
• Role of quantum coherent effects
• Manifestation of coherent quantum effects from molecular gases to solids
• Masers and gas sensing of weakly aligned molecules at room temperature.

Who Should Attend:
• Undergraduate and Graduate students
• Everyone who want to learn about coherent effects

About the Presenter: Yuri Rostovtsev from The University of North Texas

Dr. Yuri Rostovtsev is a professor of physics at the University of North Texas, Denton, TX USA, known for his contribution to the quantum coherent effects in various media, ranging from atomic and molecular gases, solids to nucleus. Dr. Yuri Rostovtsev has published more than 200 papers in referred journals, and his research interests lay in atomic and molecular physics, laser spectroscopy, Raman spectroscopy, laser physics, quantum and nonlinear optics, free electron lasers, quantum thermodynamics, quantum information, quantum computers, nanoplasmonincs, nanophotonics, nanomaterials, super-resolution, collective and cooperative excitations and phenomena. He is a senior member of the Optical Society of America. Dr. Rostovtsev received the International Association of Advanced Materials (IAAM) Medal Award for the year 2019, and he was Fulbright Scholar, 2021-2022 (Fulbright Scholarship to Serbia).