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Optomechanical detection of single bacterium mechanical modes

AuthorsGil-Santos, Eduardo ; Ruz Martínez, José Jaime ; Malvar, Óscar ; Favero, Iván; Lemaître, Aristide; Kosaka, Priscila M. ; García-López, Sergio; Calleja, Montserrat ; Tamayo de Miguel, Francisco Javier
Issue Date27-Oct-2020
Citation8th Multifrequency AFM Conferenced (2020)
AbstractLow-frequency phonon modes of biological particles such as proteins, viruses and bacteria involve coherent structural vibrations at frequencies in the THz and GHz domains. These vibration modes carry information on its structure and mechanical properties that play a pivotal role in many relevant biological processes. Despite the rapid advances of optical spectroscopy techniques, detection of low-frequency phonons of single bioparticles has remained elusive. Here we harness a particular regime in the physics of mechanical resonator sensing that serves for detecting them. By depositing single bacterium on the surface of ultra-high frequency optomechanical disk resonators in ambient conditions, we demonstrate that the vibration modes of the disk and bacterium hybridize when their associated frequencies are similar (Figure 1). A general theoretical framework is developed to describe the different regimes that can be found when an analyte adsorbs on a mechanical resonant sensor.
DescriptionResumen del trabajo presentado en la 8th Multifrequency AFM Conferenced, celebrada en Madrid (España), del 27 al 30 de octubre de 2020
Appears in Collections:(IMN-CNM) Comunicaciones congresos
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