Low threshold gain metal coated laser nanoresonators
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We introduce a low refractive index layer between the metal and the gain medium in metal-coated laser resonators and demonstrate that it can significantly reduce the dissipation losses. Analysis of a gain medium waveguide shows that for a given waveguide radius, the low index layer has an optimal thickness for which the lasing threshold gain is minimal. The waveguide analysis is used for the design of a novel three-dimensional cylindrical resonator that is smaller than the vacuum wavelength in all three dimensions and exhibits a low enough threshold gain to lase at room temperature.
| Original language | English |
|---|---|
| Pages (from-to) | 1261-1263 |
| Number of pages | 3 |
| Journal | Optics Letters |
| Volume | 33 |
| Issue number | 11 |
| Early online date | 30 Apr 2008 |
| DOIs | |
| Publication status | Published - 1 Jun 2008 |