UCLA researcher Mona Jarrahi breaks down critical achievements in the terahertz domain, with particular focus on terahertz optoelectronics. Biomedical, plasmonic, and imaging applications are explored, as are commercial pursuits. In advance of the inaugural Photonics Spectra Spectroscopy conference April 12-13, Richard Crocombe, principal at Crocombe Spectroscopy Consulting, and Ellen Miseo, president of the Coblentz Society, introduce listeners to the event program and individual sessions.