A novel design for photoacoustic mass sensors operating above 100 GHz is proposed. The design s based on impulsive optical excitation of a pseudosurface acoustic wave in a surface phononic crystal with nanometric periodic grating, and on time-resolved extreme ultraviolet detection of the pseudosurface acoustic wave frequency shift upon mass loading the device. The present design opens the path to sensors operating in a frequency range currently unaccessible to electro-acoustical transducers, providing enhanced sensitivity, miniaturization and incorporating time-resolving capability while forgoing the piezoelectric substrate requirement.
Banfi, F., Nardi, D., Zagato, E., Giannetti, C., Ferrini, G., Design of a surface acoustic wave mass sensor in the 100 GHz range, <<APPLIED PHYSICS LETTERS>>, 2012; 2012 (100): N/A-N/A. [doi:10.1063/1.4729624] [http://hdl.handle.net/10807/9785]
Design of a surface acoustic wave mass sensor in the 100 GHz range
Banfi, Francesco;Zagato, Elisa;Giannetti, Claudio;Ferrini, Gabriele
2012
Abstract
A novel design for photoacoustic mass sensors operating above 100 GHz is proposed. The design s based on impulsive optical excitation of a pseudosurface acoustic wave in a surface phononic crystal with nanometric periodic grating, and on time-resolved extreme ultraviolet detection of the pseudosurface acoustic wave frequency shift upon mass loading the device. The present design opens the path to sensors operating in a frequency range currently unaccessible to electro-acoustical transducers, providing enhanced sensitivity, miniaturization and incorporating time-resolving capability while forgoing the piezoelectric substrate requirement.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
