A Three-Dimensionally Isotropic and Perfectly Vacuum-Impedance-Matched Negative-Index Material
2014 (English)In: Journal of the Physical Society of Japan, ISSN 0031-9015, E-ISSN 1347-4073, Vol. 83, no 12, 124401- p.Article in journal (Refereed) Published
A new scenario for realizing a gain left-handed atomic vapor medium based on both dressed-state mixed-parity transitions (for simultaneous electric-and magnetic-dipole resonance) and incoherently-pumped population transfer (for high gain amplification) in a four-level atomic system is suggested. Dressed-state assisted simultaneous electric-and magnetic-dipole allowed transitions in such a four-level atomic system (of, e.g., neutral alkali-metal atoms such as lithium and potassium atoms) are utilized for achieving negative refractive index with impedance perfectly matched to vacuum. The attractive features of the present scenario include: i) three-dimensionally isotropic negative indices; ii) incoherent-gain wave amplification; iii) perfect impedance matching to vacuum. All these important properties of the double-negative medium would have potential applications in designing some optical and photonic devices, including particularly subwavelength focusing system and negative-index superlens for perfect imaging.
Place, publisher, year, edition, pages
2014. Vol. 83, no 12, 124401- p.
Electromagnetically Induced Transparency, Split-Ring Resonators, Refractive-Index, Metamaterials, Absorption, Spectroscopy, Atoms, Gain
Other Physics Topics
IdentifiersURN: urn:nbn:se:kth:diva-157588DOI: 10.7566/JPSJ.83.124401ISI: 000344653500008ScopusID: 2-s2.0-84924943638OAI: oai:DiVA.org:kth-157588DiVA: diva2:771615
QC 201412152014-12-152014-12-112014-12-15Bibliographically approved