Sustainable pulling motion of an active scatterer

In this paper, we concern the generation of attractive net motion with respect to location external wave source for active spherical carriers. Here recall that exerted acoustic radiation force in an field resulting from incident wave, a scattered and radiated carrier, can be positive, negative, or zero based on object field. Thus, general case, sustainable pulling is not guaranteed. work, by considering point average single mode, over complete wavelength, equal applied passive (which always positive), put forward technique generate negative wavelength ensure attractive. The idea here simultaneously excite two modes breathing first, difference phase excitations. We will also show controlling difference, zero. Moreover, specific differences only but itself never experiences positive value whole at those differences, which desired state achieve perfect motion. formulation paper developed velocity distribution surface sphere, implementation method piezoelectric actuators suggested. Here, setting zero-radiation (i.e., function cancellation) as reasonable criterion determination required amplitude operation voltage, calculate averaged vs frequency difference. current hope achieving maneuverability extends concept manipulation smart carriers reinforces literature beam handling techniques.