Practical sub-λ/2 acoustic focusing using a liquid-immersed metamaterial lens

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dc.contributor Helsingin yliopisto, Matemaattis-luonnontieteellinen tiedekunta fi
dc.contributor University of Helsinki, Faculty of Science en
dc.contributor Helsingfors universitet, Matematisk-naturvetenskapliga fakulteten sv
dc.contributor.author Kekkonen, Tuukka
dc.date.issued 2021
dc.identifier.uri URN:NBN:fi:hulib-202105102095
dc.identifier.uri http://hdl.handle.net/10138/329719
dc.description.abstract The sub-λ/2 focusing, also known as super resolution, is widely studied in optics, but only few practical realizations are done in acoustics. In this contribution, I show a novel way to produce sub- λ/2 focusing in the acoustic realm. I used an oil-filled cylinder immersed in liquid to focus an incident plane wave into a line focus. Three different immersion liquids were tested: water, olive oil, and pure ethanol. In addition to the practical experiment, we conducted a series of finite element simulations, by courtesy of Joni Mäkinen, to compare to the experimental results. en
dc.language.iso eng
dc.publisher Helsingin yliopisto fi
dc.publisher University of Helsinki en
dc.publisher Helsingfors universitet sv
dc.subject Acoustic
dc.subject jet
dc.subject ultrasonics
dc.subject microscopy
dc.subject super resolution
dc.subject diffraction limit
dc.title Practical sub-λ/2 acoustic focusing using a liquid-immersed metamaterial lens en
dc.type.ontasot pro gradu -tutkielmat fi
dc.type.ontasot master's thesis en
dc.type.ontasot pro gradu-avhandlingar sv
dct.identifier.urn URN:NBN:fi:hulib-202105102095
dc.subject.specialization Elektroniikka ja teollisuusfysiikka fi
dc.subject.specialization Electronics and Industrial Physics en
dc.subject.specialization Elektronik och industrifysik sv
dc.subject.degreeprogram Materiaalitutkimuksen maisteriohjelma fi
dc.subject.degreeprogram Master's Programme in Materials Research en
dc.subject.degreeprogram Magisterprogrammet i materialforskning sv

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