class dielectric_constant
The class that handles the storage of dielectric constants,
1+i2, and their conversions to optical
constants (n and k). Functions that require
this information can be prototyped with either optical_constant or
dielectric_constant arguments, and the compiler will
perform the conversion when necessary. Use of the classes
optical_constant and
dielectric_constant avoids one accidentally
confusing the two when passing values to functions. To
store information about the wavelength dependence of the
optical constants, use the class dielectric_function.
Include file:
#include "optconst.h"
Source code:
optconst.h
See also:
SCATMECH Home,
Conventions, optical_constant, dielectric_function
M. Born and E. Wolf, Principles of Optics,
(Pergamon, Oxford, 1980).
Definition of public elements:
class dielectric_constant {
double e1;
double e2;
dielectric_constant();
dielectric_constant( complex<double> x);
dielectric_constant( double x, double y=0.);
dielectric_constant( const optical_constant& n);
operator complex<double>() const;
friend istream& operator>>(istream& is,dielectric_constant& e);
friend ostream& operator<<(ostream& os,const dielectric_constant& ee);
};
double e1
double e2
The real and imaginary part of the dielectric constant.
dielectric_constant()
Default constructor that initializes the dielectric constant to that appropriate for vacuum.
dielectric_constant( complex<double> x)
Constructor that initializes the dielectric constant to the value x.
Example:
complex<double> eps; dielectric_constant dc(eps);
dielectric_constant( double x, double y=0.0)
Constructor that initializes the dielectric constant to complex<double>(x,y).
Example:
dielectric_constant eps(2.25);
dielectric_constant( const optical_constant& n)
Constructor that performs conversion from an optical_constant to dielectric_constant.
Example:
optical_constant n(1.5); dielectric_constant e(n);
operator complex<double>() const
Conversion from dielectric_constant to a complex<double>. This conversion should be made whenever actual calculations are made with the dielectric_constant.
Example:
dielectric_constant e; double theta; complex<double> q=sqrt(sqr((complex<double>)e)-sqr(sin(theta)));
friend istream& operator>>(istream& is,dielectric_constant& e)
Input of a dielectric_constant from an istream.
Example:
dielectric constant e; cout << "Enter dielectric constant:"; cin >> e;
friend ostream& operator<<(ostream& os,const dielectric_constant& ee)
Output of a dielectric_constant to an ostream.
Example:
dielectric_constant e; cout << "Dielectric constant = " << e << endl;
For More Information
SCATMECH Technical Information and Questions
Optical Technology Division (OTD) Home Page
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Current SCATMECH version: 6.00 (February 2008)
This page first online: Version 1.00 (March 2000)
This page last modified: Version 6.00 (February 2008)