Improving and controlling the efficiency of a gain medium is one of the most challenging problems of laser research. By measuring the gain length in an opal-based photonic crystal doped with laser dye, we demonstrate that optical amplification is more than twenty-fold enhanced along the Γ-K symmetry directions of the face-centered-cubic photonic crystal. These results are theoretically explained by directional variations of the density of states, providing a quantitative connection between density of the states and light amplification.
Optical amplification enhancement in photonic crystals / R., Sapienza; M., Leonetti; L. S., Froufe Perez; J. F., Galisteo Lopez; Conti, Claudio; C., Lopez. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - STAMPA. - 83:2(2011), p. 023801. [10.1103/physreva.83.023801]
Optical amplification enhancement in photonic crystals
CONTI, CLAUDIO;
2011
Abstract
Improving and controlling the efficiency of a gain medium is one of the most challenging problems of laser research. By measuring the gain length in an opal-based photonic crystal doped with laser dye, we demonstrate that optical amplification is more than twenty-fold enhanced along the Γ-K symmetry directions of the face-centered-cubic photonic crystal. These results are theoretically explained by directional variations of the density of states, providing a quantitative connection between density of the states and light amplification.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
