title: Subwavelength micropillar array terahertz lasers.
abstract: We report on micropillar-based terahertz lasers with active pillars that are much smaller than the emission wavelength. These micropillar array lasers correspond to scaled-down band-edge photonic crystal lasers forming an active photonic metamaterial. In contrast to photonic crystal lasers which use significantly larger pillar structures, lasing emission is not observed close to high-symmetry points in the photonic band diagram, but in the effective medium regime. We measure stimulated emission at 4 THz for micropillar array lasers with pillar diameters of 5 µm. Our results not only demonstrate the integration of active subwavelength optics in a terahertz laser, but are also an important step towards the realization of nanowire-based terahertz lasers.
authors: Michael
authors: M
authors: Krall
authors: Martin
authors: M
authors: Brandstetter
authors: Christoph
authors: C
authors: Deutsch
authors: Hermann
authors: H
authors: Detz
authors: Aaron Maxwell
authors: AM
authors: Andrews
authors: Werner
authors: W
authors: Schrenk
authors: Gottfried
authors: G
authors: Strasser
authors: Karl
authors: K
authors: Unterrainer
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D007834:Lasers; D053770:Nanowires / Q000737:chemistry* / Q000528:radiation effects* / Q000648:ultrastructure; D055053:Terahertz Radiation