Simultaneous negative permittivity and permeability in a coherent atomic vapour
2007 (English)In: Chinese Physics (Beijing), ISSN 1009-1963, Vol. 16, no 7, 1976-1985 p.Article in journal (Refereed) Published
A new quantum optical mechanism to realize simultaneously negative electric permittivity and magnetic permeability is suggested. In order to obtain a negative permeability, we choose a proper atomic configuration that can dramatically enhance the contribution of the magnetic- dipole allowed transition via the atomic phase coherence. It is shown that the atomic system chosen with proper optical parameters can give rise to striking electromagnetic responses (leading to a negative refractive index) and that the atomic vapour becomes a left-handed medium in an optical frequency band. Differing from the previous schemes of artificial composite metamaterials (based on classical electromagnetic theory) to achieve the left-handed materials, which consist of anisotropic millimetre- scale composite structure units, the left- handed atomic vapour presented here is isotropic and homogeneous at the atomic-scale level. Such an advantage may be valuable in realizing the superlens (and hence perfect image) with left- handed atomic vapour.
Place, publisher, year, edition, pages
2007. Vol. 16, no 7, 1976-1985 p.
negative permittivity, negative permeability, coherent atomic vapour, electric- and magnetic-dipole allowed transitions
IdentifiersURN: urn:nbn:se:kth:diva-37191DOI: 10.1088/1009-1963/16/7/029ISI: 000247897000029ScopusID: 2-s2.0-34547476579OAI: oai:DiVA.org:kth-37191DiVA: diva2:432506