Linear properties of finite photonic band gap structures: Group velocity, energy velocity, and effective dispersion relations

D’Aguanno, Giuseppe
April 2001
AIP Conference Proceedings;2001, Vol. 560 Issue 1, p337
Academic Journal
A re-evaluation of the notions of group (V[sub g]) and energy (V[sub e]) velocities in finite photonic band gap structures leads us to conclude that the two velocities are related by V[sub e] = |t|²V[sub g] and that V[sub e] =V[sub g] only at each peak of transmission (|t|²=1). This result impacts our understanding of the effective dispersion properties of layered materials, and can be used to better understand a wide range of phenomena including the question of superluminal tunneling times.


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