Abstract
Based on ab initio calculations, short B-doped monatomic carbon chains (MCCs) are suggested to serve as working medium for tunable infrared lasers. The MCCs derived from single-layer graphene in vacuum are proved to be very stable at room temperature, and their band gap is quite stretching-controllable with corresponding laser wavelength varying in the range 870–4590 nm, which is not easy to be implemented via previous techniques. High electro-optical conversion efficiency can be achieved by simply applying electric voltage on the chain ends and the MCC lasers are naturally polarized.
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