Publications by authors named "V B Sultanov"
Article Synopsis
- * This study demonstrates polarization engineering of biphotons using quasi-bound states in the continuum (qBIC) resonances in GaAs metasurfaces, enhancing biphoton generation.
- * The research shows that the qBIC mode and symmetry of meta-atoms can be adjusted to control single-photon and two-photon polarization states, paving the way for advancements in generating quantum light for future technologies.
Impact of regiodefects in the ferroelectric poly(vinylidene difluoride--trifluoroethylene) copolymer [poly(VDF--TrFE)] on the electrocaloric effect was studied with use of a developed analytical model and molecular dynamics (MD) simulations. It was shown earlier that the electrocaloric effect in these polymers is caused by the first-order phase transition from the ferroelectric β phase to the paraelectric conformationally disordered (condis) phase. MD simulations performed in the current work show that the presence of regiodefects in polymer chains makes this phase transition more gradual, the second order.
View Article and Find Full Text PDFLiquid crystals, with their ability to self-assemble, strong response to an electric field and integrability into complex systems, are key materials in light-beam manipulation. The recently discovered ferroelectric nematic liquid crystals also have considerable second-order optical nonlinearity, making them a potential material for nonlinear optics. Their use as sources of quantum light could considerably extend the boundaries of photonic quantum technologies.
View Article and Find Full Text PDFMetasurfaces are artificially structured surfaces able to control the properties of light at subwavelength scales. While, initially, they have been proposed as means to control classical optical fields, they are now emerging as nanoscale sources of quantum light, in particular of entangled photons with versatile properties. Geometric resonances in metasurfaces have been recently used to engineer the frequency spectrum of entangled photons, but the emission directivity was so far less studied.
View Article and Find Full Text PDFArticle Synopsis
- The text discusses the emerging field of "flat optics" in quantum optics, emphasizing its potential for creating polarization entanglement, which is currently underdeveloped in this area.
- It highlights a novel method to generate photon pairs with adjustable polarization entanglement using spontaneous parametric downconversion (SPDC) in a 400-nm GaP film, showcasing the flexibility offered by "flat" platforms.
- The research demonstrates that by varying the pump polarization, the team can control the entanglement of photon pairs, achieving significantly precise effects, including an ultranarrow Hong-Ou-Mandel effect, with implications for further advancements in hyperentanglement.