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Tunable polarization-selective diffraction from plasmon-modified electromagnetically induced gratings in a double V-type configuration

Suleiman Ibrahim MohammadINTI International University, Negeri Sembilan 71800, MalaysiaMehulkumar B. PatelAsokan VasudevanFaculty of Business and Communications, INTI International University, Negeri Sembilan 71800, MalaysiaMalatesh AkkurDepartment of Physics & Electronics, School of Sciences, JAIN (Deemed to be University), Bangalore, Karnataka, IndiaBasem Abu ZneidFaculty of Engineering, Hourani Center for Applied Scientific Research, Al-Ahliyya Amman University, Amman, JordanGeetha SubramaniamFaculty of Health and Life Sciences, INTI International University, Persiaran Perdana BBN Putra Nilai, Nilai, Negeri Sembilan 71800, MalaysiaNilufar RajabovaDepartment of World History, Karshi State University, UzbekistanReya SharmaDepartment of Physics, Sharda School of Engineering & Sciences, Sharda University, Greater Noida, IndiaSanjeev KumarDepartment of Physics, University Institute of Sciences, Chandigarh University, Mohali, Punjab, IndiaAli KhalafRadiology Techniques Department, College of Medical Technology, The Islamic University, Najaf, Iraq

2026en

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Annotatsiya

We study electromagnetically induced grating (EIG) in a double V-type atomic system driven by a standing-wave control field and interacting with circularly polarized probe light in the presence of a nearby plasmonic nanostructure. In free space, the system exhibits symmetric amplitude and phase modulations for left- and right-circular components, resulting in identical diffraction patterns with weak higher-order contributions. By increasing the intensity of the standing-wave field, phase modulation becomes dominant, leading to enhanced diffraction into higher orders. When the system is placed near a plasmonic nanostructure, symmetry between polarization components is broken due to plasmon-induced modifications of decay rates and susceptibility. This results in polarization-dependent grating formation and distinctly different diffraction behaviors. We further show that both emitter–plasmon separation and detuning provide effective control over the diffraction asymmetry, enabling tunable redistribution of optical energy among diffraction orders. The results demonstrate controllable anisotropic diffraction at the quantum–plasmonic interface with potential applications in polarization-selective light manipulation.

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Identifikatorlar

DOI: 10.1016/j.photonics.2026.101613

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