Open AccessCover Picture: Phys. Status Solidi C 2–3/2016
Publication year - 2016
Publication title -
physica status solidi (c)
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 0.21
H-Index - 46
eISSN - 1610-1642
pISSN - 1862-6351
DOI - 10.1002/pssc.201670114
Subject(s) - cover (algebra) , population inversion , population , inversion (geology) , luminescence , photonics , computer science , physics , engineering physics , telecommunications , optoelectronics , laser , optics , engineering , mechanical engineering , geology , paleontology , demography , structural basin , sociology
Coherent light sources pumped by external fields require multi‐level systems to achieve a population inversion and they always convert an input frequency into lower one. In their paper on pp. 105–108, Hata and coworkers, however, theoretically proposed a frequency up‐conversion luminescence from a two‐level system with inverted population. The two‐level system interacts with a metallic nano‐antenna sustaining a localized surface plasmon‐polariton. The obtained result shows that a strong and off‐resonant Gaussian pulse laser with optimum peak intensity realizes the population inversion of the two‐level system, which generates the up‐converted luminescence. This demonstration indicates the potential applications of the present system in novel coherent light sources.