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Hybrid <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi mathvariant="bold">k</mml:mi><mml:mo>·</mml:mo><mml:mi mathvariant="bold">p</mml:mi></mml:mrow></mml:math> tight-binding model for intersubband optics in atomically thin InSe films
We propose atomic films of $n$-doped $\ensuremath{\gamma}$-InSe as a platform for intersubband optics in the infrared and far-infrared range, coupled to out-of-plane polarized light. Depending on the film thickness (number of layers) and the amount of $n$-doping of the InSe film, these transitions span from $\ensuremath{\sim}0.7$ eV for bilayer to …