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Single Device Can Function as Both a Laser and Anti-Laser

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An integrated device that demonstrates lasing and anti-lasing at the same frequency in a single cavity has been developed using parity–time symmetry. The lasing and anti-lasing resonances that were demonstrated share common resonant features such as identical frequency dependence, coherent in-phase response, and fine spectral resolution. Lasing and anti-lasing in a single device could offer a novel path for enabling light modulation with high contrast approaching the ultimate limit. Scanning electron microscope image of the single device capable of lasing and anti-lasing. Indium...Read full article

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