Time-reversed lasing based on one-dimensional gratings
We show that a one-dimensional grating can generally exhibit time-reversed lasing better than a uniform slab. As the effective refractive index of a grating can be controlled by adjusting the geometric parameters, the time-reversed lasing can be realized for any incident wavelength in it. Moreover,...
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Veröffentlicht in: | Physics letters. A 2014-01, Vol.378 (3), p.299-302 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | We show that a one-dimensional grating can generally exhibit time-reversed lasing better than a uniform slab. As the effective refractive index of a grating can be controlled by adjusting the geometric parameters, the time-reversed lasing can be realized for any incident wavelength in it. Moreover, the operating frequency range of coherently perfect absorption for a grating structure is remarkably broad compared with a uniform structure. All these behaviors are demonstrated with GaAs/Air gratings illuminated around 794.8 nm. The properties of the proposed grating imply the potential applications such as detectors, transducers, and broad band absorber.
•Time-reversed lasing is demonstrated in a one-dimensional grating structure.•The grating structure provides broader operating frequency range for coherent perfect absorption.•The structure can be used for detectors, transducers, and broad band absorber, etc. |
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ISSN: | 0375-9601 1873-2429 |
DOI: | 10.1016/j.physleta.2013.11.017 |