Realization ofan atomically thin mirror using monolayer MoSe2
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We were able to show upto 90% extinction of an incident field that is resonant with the exciton transition in a single monolayer of MoSe2. The corresponding reflection coefficient was found to be 45% which is only limited by the decay rates and sample quality. Additionally, this monolayer is embedded in a charge controlled heterostructure that can be used to realize an electrically tunable atomically-thin mirror. This paves way to applications such as fast programmable spatial light modulators, chiral mirrors, suspended ultra-light mirrors for optomechanical devices and many more.