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Dr BEN LANG's Outputs (9)

Multipartite entanglement in a Josephson junction laser (2024)
Journal Article
Lang, B., & Armour, A. D. (2024). Multipartite entanglement in a Josephson junction laser. Physical Review A, 110(6), Article 062611. https://doi.org/10.1103/PhysRevA.110.062611

We analyze the entanglement in a model Josephson photonics system in which a dc voltage-biased Josephson junction couples a collection of cavity modes and populates them with microwave photons. Using an approximate quadratic Hamiltonian model, we stu... Read More about Multipartite entanglement in a Josephson junction laser.

Reflection by two level system: phase singularities on the Poincaré hypersphere (2023)
Journal Article
Lang, B., Harbord, E., & Oulton, R. (2023). Reflection by two level system: phase singularities on the Poincaré hypersphere. Journal of Optics, 25(12), Article 125403. https://doi.org/10.1088/2040-8986/ad065a

We consider the reflection of a photon by a two-level system in a quasi-one-dimensional waveguide. The waveguide polarisation at the location of the two-level system and the transition dipole are key determinants of the physics, controlling of the ph... Read More about Reflection by two level system: phase singularities on the Poincaré hypersphere.

Unstructured Transmission Line Modelling (TLM) Method for Modelling of Advanced Photonic Structures (2023)
Presentation / Conference Contribution
Vukovic, A., Sewell, P., Dimitrijevic, T., Lang, B., Rihani, S., Boylan, K., Berry, G., Hattasan, N., Moodie, D., Rawsthorne, J., & Robertson, M. (2023, October). Unstructured Transmission Line Modelling (TLM) Method for Modelling of Advanced Photonic Structures. Presented at 16th International Conference on Advanced Technologies, Systems and Services in Telecommunications (TELSIKS 2023)), Niš , Serbia

This paper overviews the most recent advances in the unstructured Transmission Line Modelling method that is uniquely placed for modeling advanced photonic applications with multi-scale features. The paper focuses on the holistic approach that needs... Read More about Unstructured Transmission Line Modelling (TLM) Method for Modelling of Advanced Photonic Structures.

Modelling Photonic Crystal Surface Emitting Lasers (PCSELs) with Iterative Weighted Index Method (2023)
Presentation / Conference Contribution
Lang, B., Vukovic, A., Sewell, P., Rihani, S., Boylan, K., Berry, G., Hattasan, N., Moodie, D., & Rawsthorne, J. (2023, October). Modelling Photonic Crystal Surface Emitting Lasers (PCSELs) with Iterative Weighted Index Method. Presented at 2023 International Conference on Electromagnetics in Advanced Applications, ICEAA 2023, Venice, Italy

Photonic crystal surface emitting lasers (PCSELs) are a promising type of semiconductor laser, able to maintain single-mode operation over a large area, resulting in a high-power beam with small angular divergence.

Discrete time translation symmetry breaking in a Josephson junction laser (2023)
Journal Article
Lang, B., Morley, G. F., & Armour, A. D. (2023). Discrete time translation symmetry breaking in a Josephson junction laser. Physical review B: Condensed matter and materials physics, 107(14), Article 144509. https://doi.org/10.1103/PhysRevB.107.144509

A Josephson junction laser is realized when a microwave cavity is driven by a voltage-biased Josephson junction. Through the ac Josephson effect, a dc voltage generates a periodic drive that acts on the cavity and generates interactions between its m... Read More about Discrete time translation symmetry breaking in a Josephson junction laser.

Time-reversal constraint limits unidirectional photon emission in slow-light photonic crystals (2016)
Journal Article
Lang, B., Beggs, D. M., & Oulton, R. (2016). Time-reversal constraint limits unidirectional photon emission in slow-light photonic crystals. Philosophical Transactions A: Mathematical, Physical and Engineering Sciences, 374(2075), https://doi.org/10.1098/rsta.2015.0263

Photonic crystal waveguides are known to support C-points—point-like polarization singularities with local chirality. Such points can couple with dipole-like emitters to produce highly directional emission, from which spin-photon entanglers can be bu... Read More about Time-reversal constraint limits unidirectional photon emission in slow-light photonic crystals.

Stability of polarization singularities in disordered photonic crystal waveguides (2015)
Journal Article
Lang, B., Beggs, D. M., Young, A. B., Rarity, J. G., & Oulton, R. (2015). Stability of polarization singularities in disordered photonic crystal waveguides. Physical Review A, 92(6), Article 063819. https://doi.org/10.1103/physreva.92.063819

The effects of short-range disorder on the polarization characteristics of light in photonic crystal waveguides were investigated using finite-difference time-domain simulations with a view to investigating the stability of polarization singularities... Read More about Stability of polarization singularities in disordered photonic crystal waveguides.

Closed sets of correlations: answers from the zoo (2014)
Journal Article
Lang, B., Vértesi, T., & Navascués, M. (2014). Closed sets of correlations: answers from the zoo. Journal of Physics A: Mathematical and Theoretical, 47(42), Article 424029. https://doi.org/10.1088/1751-8113/47/42/424029

We investigate the conditions under which a set of multipartite nonlocal correlations can describe the distributions achievable by distant parties conducting experiments in a consistent universe. Several questions are posed, such as: are all such set... Read More about Closed sets of correlations: answers from the zoo.