Simplified description of an active medium in quantum plasmonics
arXiv:1612.01231 · doi:10.1088/1361-6455/aa8375
Abstract
In order to simplify the theoretical description of spasers, a gain medium is commonly represented by a two-level system. A realistic model, however, should have four levels. By using the Lindblad equations we develop a description of such a system and show that depending on ratios of the Rabi frequency and the rate of relaxation of the polarization, a four-level system may be reduced to one of two effective two-level systems that reproduce the key properties of a four-level system.
References in corpus (8)
- Quantum Plasmonics
- Spaser as Nanoscale Quantum Generator and Ultrafast Amplifier
- Overcoming losses with gain in a negative refractive index metamaterial
- Self-consistent calculation of metamaterials with gain
- Toy model for plasmonic metamaterial resonances coupled to two-level system gain
- Constraints on relaxation rates for N-level quantum systems
- Plasmon Injection to Compensate and Control Losses in Negative Index Metamaterials
- Rabi oscillations in spasers during the nonradiative plasmon excitation