Dirk R. Englund

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cond-mat.mtrl-sci2025

On-chip high-order parametric downconversion in the excitonic Mott insulator Nb $_{3}$ Cl $_{8}$ for programmable multiphoton entangled states

Dmitry Skachkov, Dirk R. Englund, Michael N. Leuenberger

Spontaneous parametric downconversion (SPDC) and four-wave mixing in $I ¨ ^{(2)}$ and $I ¨ ^{(3)}$ media underpin most entangled-photon sources, but direct generation of higher-order e…

cond-mat.mtrl-sci2025

Multiferroic Dark Excitonic Mott Insulator in the Breathing-Kagome Lattice Material Nb $_{3}$ Cl $_{8}$

Mahtab A. Khan, Naseem Ud Din, Dmitry Skachkov +2

Flat electronic bands strongly enhance Coulomb interactions and can stabilize unconventional insulating states. Motivated by the recent discovery of flat bands in breathing Kagome…

cond-mat.mtrl-sci2025

Er $_{Al}$ :Al $_{2}$ O $_{3}$ for Telecom-Band Photonics: Electronic Structure and Optical Properties

Mahtab A. Khan, Jayden D. Craft, Hari P. Paudel +3

Er-doped Al $_{2}$ O $_{3}$ is a promising host for telecom-band integrated photonics. Here we combine ab initio calculations with a symmetry-resolved analysis to elucidate substitutional…

cond-mat.mtrl-sci2024

Linear and nonlinear optical response based on many-body GW-Bethe-Salpeter and Kadanoff-Baym approaches for two-dimensional layered semiconductors

Dmitry Skachkov, Dirk R. Englund, Michael N. Leuenberger

The family of 2D layered semiconductors, including transition metal chalcogenides (TMCs) of the form MX (M=Ga, In; X=S, Se, Te) exhibit exceptional nonlinear optical properties. Th…

On-chip high-order parametric downconversion in the excitonic Mott insulator Nb3​Cl8​ for programmable multiphoton entangled states

Multiferroic Dark Excitonic Mott Insulator in the Breathing-Kagome Lattice Material Nb3​Cl8​

ErAl​:Al2​O3​ for Telecom-Band Photonics: Electronic Structure and Optical Properties

Linear and nonlinear optical response based on many-body GW-Bethe-Salpeter and Kadanoff-Baym approaches for two-dimensional layered semiconductors

On-chip high-order parametric downconversion in the excitonic Mott insulator Nb $_{3}$ Cl $_{8}$ for programmable multiphoton entangled states

Multiferroic Dark Excitonic Mott Insulator in the Breathing-Kagome Lattice Material Nb $_{3}$ Cl $_{8}$

Er $_{Al}$ :Al $_{2}$ O $_{3}$ for Telecom-Band Photonics: Electronic Structure and Optical Properties