ncku-talk2011-12-22

NCTS (South)

DATE 2011-12-22

TIME 14:00

PLACE R203, 2F, NCTS, NCKU

FIELD Other

SPEAKER Prof. Herbert G. Winful - EECS Department University of Michigan

TITLE From Bistability to Superluminality in Photonic Bandgap Structures

ABSTRACT Periodic structures play a rather fundamental role in optics, with applications ranging from fiber Bragg gratings to distributed feedback lasers. In this talk we review our work on linear and nonlinear propagation in these structures. In linear propagation we encounter phenomena such as apparent superluminal tunneling and a delay time that saturates with the length of the structure. This paradoxical phenomenon is known as the “Hartman Effect” and is the subject of much controversy. We show how our work resolves this paradox. We also describe nonlinear phenomena such as optical bistability, gap solitons, and distributed-feedback Raman lasing that can occur in these structures.

NCTS (South)

DATE	2011-12-22

TIME	14:00

PLACE	R203, 2F, NCTS, NCKU

FIELD	Other

SPEAKER	Prof. Herbert G. Winful - EECS Department University of Michigan

TITLE	From Bistability to Superluminality in Photonic Bandgap Structures

ABSTRACT	Periodic structures play a rather fundamental role in optics, with applications ranging from fiber Bragg gratings to distributed feedback lasers. In this talk we review our work on linear and nonlinear propagation in these structures. In linear propagation we encounter phenomena such as apparent superluminal tunneling and a delay time that saturates with the length of the structure. This paradoxical phenomenon is known as the “Hartman Effect” and is the subject of much controversy. We show how our work resolves this paradox. We also describe nonlinear phenomena such as optical bistability, gap solitons, and distributed-feedback Raman lasing that can occur in these structures.