Optical conductivity is the property of a material which gives the relationship between the induced current density in the material and the magnitude of the inducing electric field for arbitrary frequencies. This linear response function is a generalization of the electrical conductivity, which is usually considered in the static limit, i.e., for time-independent or slowly varying electric fields.
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| - Optische Leitfähigkeit (de)
- Optical conductivity (en)
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| - Die optische Leitfähigkeit verallgemeinert die elektrische Leitfähigkeit (die oft nur als Gleichstromleitfähigkeit verstanden wird), um ihre Frequenzabhängigkeit zu beachten. Die elektrische Leitfähigkeit bei einer bestimmten Frequenz bestimmt die Durchlässigkeit von Materialien für elektromagnetische Wellen dieser Frequenz. Bekannte Modelle, welche die optische Leitfähigkeit beschreiben, sind die Drude-Theorie und Drude-Sommerfeld-Theorie für freie Ladungsträger in Metallen und das Modell des Lorentz-Oszillators für gebundene Ladungsträger. (de)
- Optical conductivity is the property of a material which gives the relationship between the induced current density in the material and the magnitude of the inducing electric field for arbitrary frequencies. This linear response function is a generalization of the electrical conductivity, which is usually considered in the static limit, i.e., for time-independent or slowly varying electric fields. (en)
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| - Die optische Leitfähigkeit verallgemeinert die elektrische Leitfähigkeit (die oft nur als Gleichstromleitfähigkeit verstanden wird), um ihre Frequenzabhängigkeit zu beachten. Die elektrische Leitfähigkeit bei einer bestimmten Frequenz bestimmt die Durchlässigkeit von Materialien für elektromagnetische Wellen dieser Frequenz. Bekannte Modelle, welche die optische Leitfähigkeit beschreiben, sind die Drude-Theorie und Drude-Sommerfeld-Theorie für freie Ladungsträger in Metallen und das Modell des Lorentz-Oszillators für gebundene Ladungsträger. (de)
- Optical conductivity is the property of a material which gives the relationship between the induced current density in the material and the magnitude of the inducing electric field for arbitrary frequencies. This linear response function is a generalization of the electrical conductivity, which is usually considered in the static limit, i.e., for time-independent or slowly varying electric fields. While the static electrical conductivity is vanishingly small in insulators (such as diamond or porcelain), the optical conductivity always remains finite in some frequency intervals (above the optical gap in the case of insulators). The total optical weight can be inferred from sum rules. The optical conductivity is closely related to the dielectric function, the generalization of the dielectric constant to arbitrary frequencies. (en)
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