Urgunoon Saleem

Detail-oriented educator from Pakistan with a strong academic background, dedicated to fostering an engaging and enriching learning environment. Proven ability to enhance educational experiences and opportunities for students and colleagues through innovative teaching methods and a commitment to continuous improvement.

• [2024] SPONTANEOUSLY GENERATED STRUCTURED LIGHT IN A COHERENTLY DRIVEN FIVE-LEVEL M-TYPE ATOMIC SYSTEM We propose a scheme to analyze the generation and detection of optical vortices via spontaneous emission spectra. We consider a five-level M-type atomic system that interacts with two structured coherent light sources and the vacuum radiation field. The photon emitted via spontaneous decay carries information about the orbital angular momentum (OAM) of the newly generated structured light. It is found that, by varying the OAM of the driving fields, one can obtain various unique structured light fields via the interference of the two spontaneous decay channels. This research provides deep insights into how the manipulation of OAM of the driving fields coupled with multi-level atomic systems can enable control over the azimuthal aspects of the spontaneous emission. Considering the rich applications of structured light ranging from optical storage to optical communication, our proposal might be useful in quantum information processing technique.
• Muqaddar Abbas, Urgunoon Saleem, Rahmatullah, Yong-Chang Zhang, and Pei Zhang, Physical Review A
• [2020] AZIMUTHAL MODULATION OF PROBE ABSORPTION TRANSFER OF OPTICAL VORTICES We analyze azimuthal modulation of probe field absorption profile in a closed four-level inverted Y-type atomic system. We employ a Laguerre–Gaussian beam and a microwave field to realize spatially varying atomic susceptibility, which is responsible for the generation of structured light. An extra nonvortex control beam is used to ensure electromagnetically induced transparency at the core of Laguerre–Gaussian beam. Our proposed model exhibits both absorption and gain at different azimuthal angles, and orbital angular momentum of light can be identified via absorption profile of the probe field. We further discuss the transfer of optical vortices from Laguerre–Gaussian beam to the transmitted probe field.
• AIMEN SHUJAAT, URGUNOON SALEEM, MUQADDAR ABBAS, & RAHMAT ULLAH,PHYSICA SCRIPTA 95, 085106 (2020)

• Dr., Rahmat Ullah, Supervisor, rahmattktk@comsats.edu.pk, Assistant Professor
• Dr., Anwar Hussain, Associate Professor, anwar_ktk@comsats.edu.pk
• Prof. Dr., Sajid Qamar, Principal Investigator HEC-NRPU Funded Project, sajid_qamar@comsats.edu.pk, Rector COMSATS University Islamabad