Author: Publisher:
ISBN:
Category : Physics
Languages : de
Pages :
Book Description
Handbuch der Physik
Author: Handbuch der Physik: pt.2a-c. Licht und Materie, Ia-Ic
Author: Siegfried FlüggePublisher:
ISBN:
Category : Physics
Languages : en
Pages : 624
Book Description
Handbuch der Physik
Author: Light and Matter Ia / Licht und Materie Ia
Author: L. GenzelPublisher: Springer Science & Business Media
ISBN: 3642460747
Category : Science
Languages : en
Pages : 344
Book Description
159 elements only between states which differ in one of the single-electron wave functions, in short, HeR induces only one-electron transitions. The matrix elements 1mn and Pmn reduce to matrix elements between the single-electron wave functions. We are interested primarily in crystalline solids for which the band model is a good approximation. The Bloch single-electron wave function in this model has the form: N'I ili-';; U. r.;;) ( (1.14) ""nk r, =e nh\r , where n is the band index and U (r) has the periodicity of the lattice. The form of the Bloch function follows from the translational symmetry of the crystal, and the matrix elements between Bloch states are subject to the condition of wave-vector conservation: k'=k, for
Licht und Materie Ic
Author: Ludwig GenzelLight and Matter Ic / Licht und Materie Ic
Author: Hermann HakenPublisher: Springer Science & Business Media
ISBN: 3662220911
Category : Science
Languages : en
Pages : 337
Book Description
The concept of the laser came into existence more than a decade ago when ScHAWLOW and TowNES showed that the maser principle could be extended to the optical region. Since then this field has developed at an incredible pace which hardly anybody could have foreseen. The laser turned out to be a meeting place for such different disciplines as optics (e.g. spectroscopy), optical pumping, radio engineering, solid state physics, gas discharge physics and many other fields. The underlying structure of the laser theory is rather simple. The main questions are: what are the light intensities (a), what are the frequencies (b), what fluctua tions occur (c), or, in other words, what are the coherence properties. Roughly speaking these questions are treated by means of the rate equations (a), the semiclassical equations (b), and the fully quantum mechanical equations (c), respectively. The corresponding chapters are written in such a way that they can be read independently from each other. For more details about how to proceed, the reader is advised to consult Chap. I.4.
Handbuch der Physik
Author: Ludwig GenzelEncyclopedia of physics
Author: Siegfried FlüggePublisher:
ISBN:
Category : Cosmic rays
Languages : de
Pages : 592
Book Description
Author: 
Author: Siegfried Flügge