Spaser action, loss compensation, and stability in plasmonic systems with gain
We demonstrate that the conditions of spaser generation and the full loss compensation in a dense resonant plasmonic-gain medium (metamaterial) are identical. Consequently, attempting the full compensation or overcompensation of losses by gain will lead to instability and a transition to a spaser st...
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| Published in | Physical review letters Vol. 106; no. 15; p. 156802 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
United States
11.04.2011
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| Online Access | Get more information |
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| Summary: | We demonstrate that the conditions of spaser generation and the full loss compensation in a dense resonant plasmonic-gain medium (metamaterial) are identical. Consequently, attempting the full compensation or overcompensation of losses by gain will lead to instability and a transition to a spaser state. This will limit (clamp) the inversion and lead to the limitation on the maximum loss compensation achievable. The criterion of the loss overcompensation, leading to the instability and spasing, is given in an analytical and universal (independent from system's geometry) form. |
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| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.106.156802 |