Difference between revisions of "Variables and Constants"

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<td style="text-align: center; width: 33%">[[Main_Page#Acronyms and Unit Abbreviations|Return to Acronyms and Unit Abbreviations Menu]]</td>
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=== Common ===
=== Common ===
{| class="wikitable"  
{| class="wikitable"  
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|&beta;  
|&beta;  
|[[molecular first hyperpolarizability]] (microscopic) (beta)
|[[molecular first hyperpolarizability]] (microscopic) (beta)
|-
|&gamma;
|[[molecular second hyperpolarizability]] (microscopic) (gamma)
|-  
|-  
|cos<sup>3</sup>&theta;  
|cos<sup>3</sup>&theta;  
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|-  
|-  
|&delta;  
|&delta;  
|[[Two photo cross section]] measured in  Goppert-Mayer units (GM), with 1 GM=1×10<sup>-50</sup> cm<sup>4</sup> s molecules<sup>−1</sup> photon<sup>−1</sup> >100gm is high.)
|[[Two-photon cross section]] measured in  Goppert-Mayer units (GM), with 1 GM=1×10<sup>-50</sup> cm<sup>4</sup> s molecules<sup>−1</sup> photon<sup>−1</sup> >100gm is high.)
|-  
|-  
|<i>r</i>
|<i>r</i>
|Pockels coefficient or Linear Electooptic Cofficient [[Second-order_Processes#Kerr_and_Pockels_Effects | Pockels Effect]] r~ 10<sup>-12</sup> – 1<sup>—10</sup> m/V
|Pockels coefficient or Linear Electo-optic Coefficient [[Second-order_Processes#Kerr_and_Pockels_Effects | Pockels Effect]] r~ 10<sup>-12</sup> – 1<sup>—10</sup> m/V
|-  
|-  
|<i>r</i><sub>33</sub>  
|<i>r</i><sub>33</sub>  
|[[Electrooptic cofficient]]  (chi 33)(FM= 1000 pm/V)
|[[Electro-optic coefficient]]  (chi 33)(FM= 1000 pm/V)
|-  
|-  
|&chi;<sup>2</sup>  
|&chi;<sup>2</sup>  
|[[second-order nonlinear susceptiblity]] (first order hyperpolarizability) (macroscopic)  
|[[second-order nonlinear susceptibility]] (first order hyperpolarizability) (macroscopic)  
|-  
|-  
|&chi;<sup>3</sup>  
|&chi;<sup>3</sup>  
|[[third-order nonlinear susceptiblity]] (second order hyperpolarizability) (macroscopic) (alpha)(FM= 6-7 x 10<sup>-21</sup>(m/V)<sup>2</sup>)
|[[third-order nonlinear susceptibility]] (second order hyperpolarizability) (macroscopic) (alpha)(FM= 6-7 x 10<sup>-21</sup>(m/V)<sup>2</sup>)
|-  
|-  
|&epsilon;  
|&epsilon;  
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|-  
|-  
|&phi;<sub>fl</sub>  
|&phi;<sub>fl</sub>  
|[[Fluoresence Quantum Yield]] a ratio of photons absorbed over photons emitted
|[[Fluorescence Quantum Yield]] a ratio of photons absorbed over photons emitted
|-  
|-  
|&sigma;  
|&sigma;  

Latest revision as of 09:24, 8 November 2011

Return to Acronyms and Unit Abbreviations Menu

Common

Symbol Meaning
c speed of light (c = 299,792,458 m/s approx 3 x 106m/s)
ν frequency
h planck's constant (h = 6.62606896x 10-34 J s = 4.135667 x 10-15eV s)
λ wavelength (visible spectrum is 400-700nm)

Absorption and Emission

Symbol Meaning
ε extinction coefficient of a molecule
Φ quantum yield
Ψ wave function

EO Properties

Symbol Meaning
μ dipole moment (mu) measured in debyes
α linear polarizability (alpha)
β molecular first hyperpolarizability (microscopic) (beta)
γ molecular second hyperpolarizability (microscopic) (gamma)
cos3θ order parameter
δ Two-photon cross section measured in Goppert-Mayer units (GM), with 1 GM=1×10-50 cm4 s molecules−1 photon−1 >100gm is high.)
r Pockels coefficient or Linear Electo-optic Coefficient Pockels Effect r~ 10-12 – 1—10 m/V
r33 Electro-optic coefficient (chi 33)(FM= 1000 pm/V)
χ2 second-order nonlinear susceptibility (first order hyperpolarizability) (macroscopic)
χ3 third-order nonlinear susceptibility (second order hyperpolarizability) (macroscopic) (alpha)(FM= 6-7 x 10-21(m/V)2)
ε dielectric constant or relative static permittivity
M Transition dipole moment (measured in debyes)
N Number Density parameter
φfl Fluorescence Quantum Yield a ratio of photons absorbed over photons emitted
σ conductivity (measured in S (Siemens)/cm
t the electronic coupling, transfer integral or resonance integral
vπ half-wave driving voltage

Devices

Symbol Meaning
α material loss in dB/cm
d electrode separation
Γ optical electrical overlap
λ reorganization energy
μ charge mobility in cm2 / V s- a mobility >1 is considered good


see also Wikipedia Greek Letters in Science