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Exciton radiative lifetimes in hexagonal diamond Ge and SiGe alloys
Michele Re Fiorentin, Michele Amato, Maurizia Palummo
Recent reports of strong room-temperature photoluminescence in hexagonal diamond (2H) germanium stand in marked contrast to theoretical predictions of very weak band-edge optical t…
Exciton dynamics and high-temperature excitonic superfluidity in S-doped graphyne
Enesio Marinho, Alexandre C. Dias, Luiz A. Ribeiro +2
S-doped graphyne (S-GY) is a recently synthesized two-dimensional graphyne-based carbon allotrope that provides a promising platform for exciton engineering and coherent many-body…
Quasiparticle effects and strong excitonic features in exfoliable 1D semiconducting materials
Simone Grillo, Chiara Cignarella, Friedhelm Bechstedt +5
We report a comprehensive first-principles study of the electronic and optical properties of recently identified exfoliable one-dimensional semiconducting materials, focusing on ch…
Tunable second harmonic generation in 2D materials: comparison of different strategies
Simone Grillo, Elena Cannuccia, Maurizia Palummo +2
Nonlinear optical frequency conversion, where optical fields interact with a nonlinear medium to generate new frequencies, is a key phenomenon in modern photonic systems. However,…
Giant light emission enhancement in strain-engineered InSe/MS (M=Mo,W) van der Waals heterostructures
Elena Blundo, Marzia Cuccu, Federico Tuzi +11
Two-dimensional crystals stack together through weak van der Waals (vdW) forces, offering unlimited possibilities to play with layer number, order and twist angle in vdW heterostru…