Realization of an Electrically Tunable Narrow-Bandwidth Atomically Thin Mirror Using Monolayer MoSe2
| Autor: | Aroosa Ijaz, Sina Zeytinoglu, Patrick Back, Martin Kroner, Atac Imamoglu |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Condensed matter physics business.industry Exciton General Physics and Astronomy Charge density Heterojunction 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Ray Laser linewidth Semiconductor 0103 physical sciences Monolayer Reflection coefficient 010306 general physics 0210 nano-technology business |
| Zdroj: | Physical Review Letters. 120 |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.120.037401 |
| Popis: | The advent of two-dimensional semiconductors, such as van der Waals heterostructures, propels new research directions in condensed matter physics and enables development of novel devices with unique functionalities. Here, we show experimentally that a monolayer of MoSe_{2} embedded in a charge controlled heterostructure can be used to realize an electrically tunable atomically thin mirror, which effects 87% extinction of an incident field that is resonant with its exciton transition. The corresponding maximum reflection coefficient of 41% is only limited by the ratio of the radiative decay rate to the nonradiative linewidth of exciton transition and is independent of incident light intensity up to 400 W/cm^{2}. We demonstrate that the reflectivity of the mirror can be drastically modified by applying a gate voltage that modifies the monolayer charge density. Our findings could find applications ranging from fast programable spatial light modulators to suspended ultralight mirrors for optomechanical devices. |
| Databáze: | OpenAIRE |
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