Photonics / Fotonik

Permanent URI for this collectionhttps://hdl.handle.net/11147/2590

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Access type: Open accessPublisher: search.filters.publisher.IOP Publishing

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  • Article
    Citation - WoS: 5
    Citation - Scopus: 4
    Electromagnetically Induced Transparency and Absorption Cross-Over With a Four-Level Rydberg System
    (IOP Publishing, 2022) Oyun, Yağız; Çakır, Özgür; Sevinçli, Sevilay
    Electromagnetically induced transparency (EIT) and absorption (EIA) are quantum coherence phenomena which result from the interference of excitation pathways. Combining these with Rydberg atoms have opened up many possibilities for various applications. We introduce a theoretical model to study Rydberg-EIT and Rydberg-EIA effects in cold Cs and Rb atomic ensembles in a four-level ladder type scheme taking into account van der Waals type interactions between the atoms. The proposed many-body method for analysis of such systems involves a self-consistent mean field approach and it produces results which display a very good agreement with recent experiments. Our calculations also successfully demonstrate experimentally observed EIT-EIA cross-over in the Rb case. Being able to simulate the interaction effects in such systems has significant importance, especially for controlling the optical response of these.
  • Article
    Citation - WoS: 20
    Citation - Scopus: 23
    Aluminum and Lithium Sulfur Batteries: a Review of Recent Progress and Future Directions
    (IOP Publishing, 2021) Akgenç, Berna; Sarıkurt, Sevil; Yağmurcukardeş, Mehmet; Ersan, Fatih
    Advanced materials with various micro-/nanostructures have attracted plenty of attention for decades in energy storage devices such as rechargeable batteries (ion- or sulfur based batteries) and supercapacitors. To improve the electrochemical performance of batteries, it is uttermost important to develop advanced electrode materials. Moreover, the cathode material is also important that it restricts the efficiency and practical application of aluminum-ion batteries. Among the potential cathode materials, sulfur has become an important candidate material for aluminum-ion batteries cause of its considerable specific capacity. Two-dimensional materials are currently potential candidates as electrodes from lab-scale experiments to possible pragmatic theoretical studies. In this review, the fundamental principles, historical progress, latest developments, and major problems in Li-S and Al-S batteries are reviewed. Finally, future directions in terms of the experimental and theoretical applications have prospected.