title: Efficient, tunable, and coherent 0.18-5.27-THz source based on GaSe crystal.
abstract: Continuously tunable and coherent radiation in the wide range 56.8-1618 mum (0.18-5.27 THz) has been achieved as a novel and promising terahertz source based on collinear phase-matched difference frequency generation in a GaSe crystal. This source has the advantages of high coherence, simplicity for tuning, simple alignment, and stable output. The peak output power for the terahertz radiation reaches 69.4 W at a wavelength of 196 mum (1.53 THz), which corresponds to a photon conversion efficiency of 3.3%. A simple optimization of the design can yield a compact terahertz source.
authors.forename: Wei
authors.initials: W
authors.lastname: Shi
authors.forename: Yujie J
authors.initials: YJ
authors.lastname: Ding
authors.forename: Nils
authors.initials: N
authors.lastname: Fernelius
authors.forename: Konstantin
authors.initials: K
authors.lastname: Vodopyanov