Data associated with 'Frequency tunability and spectral control in terahertz quantum cascade lasers with phase-adjusted finite-defect-site photonic lattices’

This dataset contains experimental data presented in the paper titled 'Frequency tunability and spectral control in terahertz quantum cascade lasers with phase-adjusted finite-defect-site photonic lattices'. The effect of finite-defect-site photonic lattices (PLs) on the spectral emission of terahertz (THz) frequency quantum cascade lasers (QCLs), is studied both theoretically and experimentally. A central π-phase adjusted defect is incorporated into the PL to slectively favor emission within the photonic bandgap. The effect of the PL duty cycle and the longitudinal position of such PLs relative the QCL cavity is also investigated, and is used to demonstrate three distinct spectral behaviors: single mode emission from QCLs in the range 2.2−5 THz, with a side-mode suppression ratio of 40 dB and exhibiting continuous frequency tuning over >8 GHz; discrete tuning between two engineered emission modes separated by ~40 GHz; and multiple-mode emission with an engineered logitudinal frequency spacing between the emission lines.