Terahertz probe of individual subwavelength objects in a water environment (pages 734–742)
Luca Masini, Sandro Meucci, Jihua Xu, Riccardo Degl'Innocenti, Fabrizio Castellano, Harvey E. Beere, David Ritchie, Donatella Balduzzi, Roberto Puglisi, Andrea Galli, Fabio Beltram, Miriam S. Vitiello, Marco Cecchini and Alessandro Tredicucci
Article first published online: 4 JUN 2014 | DOI: 10.1002/lpor.201300224
A THz lab-on-a-chip device based on a microfluidic platform coupled to an integrated plasmonic antenna is shown. Using a quantum cascade laser as illumination source, liquid volumes down to the picoliter range are probed. A proof-of-concept experiment is performed in which single 10-μm diameter (∼ λ/10) microparticles flowing in water are identified and investigated. The present demonstration opens the way to the development of THz biosensing of individual living cells and small probe volumes.