Details

Autor(en) / Beteiligte

• Fu, Xiao-Jian
• Xu, Yuan-Da
• Zhou, Ji

Titel

Abnormal Dielectric Response in an Optical Range Based on Electronic Transition in Rare-Earth-Ion-Doped Crystals

Ist Teil von

• Chinese physics letters, 2012-02, Vol.29 (2), p.27805-1-027805-4

Erscheinungsjahr

2012

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• A new scheme to realize an abnormal dielectric response at optical wavelength is developed on the basis of two-level electronic transition of rare-earth ion doped crystals. Based on the semi-classical theory and the Judd-Ofelt theory, the electric dipole transition under a weak field is analyzed, and a general expression for the frequency-dependent dielectric constant is obtained. As an example, the permittivity of (Er sub(x)Yd1-x sub(3)Al sub(5)O sub(12) is calculated numerically in consideration of the transition between super(4)I sub(15/2) and super(4)F sub(9/2). An optimized dielectric property with a negative real part and low absorption is achieved. This proposes a new mechanism for building extraordinary electromagnetic media at optical frequencies by using a quantum process.