Huang–Rhys factor
E27438
The Huang–Rhys factor is a dimensionless parameter in solid-state and molecular spectroscopy that quantifies the strength of electron–phonon (vibronic) coupling during electronic transitions.
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
dimensionless physical quantity
ⓘ
spectroscopic parameter ⓘ |
| appearsIn | Poisson distribution of phonon sideband intensities ⓘ |
| appliesTo |
color centers in crystals
ⓘ
defect centers in solids ⓘ electronic transitions ⓘ molecular electronic spectra ⓘ optical absorption ⓘ photoluminescence ⓘ |
| dependsOn |
displacement between ground and excited state potential energy surfaces
ⓘ
effective phonon mode energy ⓘ |
| determines |
relative intensity of phonon sidebands
ⓘ
relative intensity of vibronic peaks ⓘ weight of zero-phonon line ⓘ |
| estimatedFrom |
fit to vibronic sideband intensities
ⓘ
temperature dependence of luminescence ⓘ |
| field |
molecular spectroscopy
ⓘ
optical spectroscopy ⓘ solid-state physics ⓘ |
| governs | relative probability of n-phonon transitions ⓘ |
| hasProperty | dimensionless ⓘ |
| influences |
Debye–Waller factor
ⓘ
Stokes shift ⓘ shape of optical absorption spectra ⓘ shape of optical emission spectra ⓘ |
| introducedBy |
A. M. Rhys
ⓘ
Kun Huang ⓘ |
| mathematicalRole | average number of phonons involved in an electronic transition ⓘ |
| quantifies |
electron–phonon coupling strength
ⓘ
vibronic coupling strength ⓘ |
| relatedTo |
Franck–Condon principle
ⓘ
surface form:
Franck–Condon factors
Franck–Condon principle ⓘ phonon sidebands ⓘ vibronic progression ⓘ zero-phonon line ⓘ |
| symbol | S ⓘ |
| typicalRange |
much less than 1 for weak coupling
ⓘ
of order 1 or larger for strong coupling ⓘ |
| usedIn |
color center spectroscopy
ⓘ
nitrogen-vacancy center spectroscopy ⓘ organic molecular crystals ⓘ quantum emitter characterization ⓘ rare-earth ion spectroscopy ⓘ semiconductor defect spectroscopy ⓘ single-molecule spectroscopy ⓘ |
| usedInModel |
configuration coordinate model
ⓘ
harmonic oscillator approximation ⓘ |
| yearProposed | 1950 ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.