Where does dielectric constant come from

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Where does dielectric constant come from?
No free charges and currents
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Polarization charge?
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Polarization charge
Bound charge density
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Meaning of complex susceptibility
In phase component of displacement current
lossy medium
Out of phase magnetic field lossy medium
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More meaning.
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Classical Model-Harmonic Oscillator
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Dispersion
Normal dispersion
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Diluted medium
Anomalous dispersion
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Lorentzian (natural) shape
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Natural lineshape
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Where is the resonance frequency?
What is K?
Spring force
U0-binding energy
Atom (electron)
So.what is the scale
Molecule
0.5-1Å
Distance
1-3Å
0.25-10eV
Binding energy
1-10eV
K
0.3-10eV/Å25-200J/m2
0.5-40eV/Å24-6000J/m2
Mass
10-30kg
10-27-10-25kg
5x1012-1.5x1014 Hz
Resonant Frequency
3x1014-1.2x1016 Hz
2-60?m
Wavelength
0.025-1?m
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Can we generate light electronically?
Consider electronic device
Distance
100nm
1eV
Binding energy
Conventional electronics cannot work above 1THz
10-6eV/Å210-5 J/m2
K
10-31kg
Mass (Effective)
Solution reduce the size Quantum Phenomena
Resonant Frequency
1012 Hz
300?m
Wavelength
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Group velocity
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Electromagnetic waves in metals
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Low frequency ??ltlt?
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High frequency ??gtgt?
?r
?/ ?p
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