Focusing Acoustic Beams with a Ball-Shaped Lens beyond the Diffraction Limit; Physical Review Applied; Vol. 8, iss. 2
| Parent link: | Physical Review Applied.— , 1958- Vol. 8, iss. 2.— 2017.— [024013, 7 p.] |
|---|---|
| Autor corporatiu: | |
| Altres autors: | , , , , , |
| Sumari: | Title screen We report on measurements of a subwavelength focusing of an ultrasound beam by a polymer ball-shaped lens (Rexolite) immersed in water at room temperature. The beam arises in the near field of the ball-lens shadow side. Considering a 8.2λ-diameter ball lens, with λ being the wavelength, we find a superfocused beam with 14.4-dB-intensity gain, a full width and a full length at half maximum of λ/2and 2.2λ, respectively, and sidelobes under −10 dB. The observed phenomenon is in excellent agreement with the theoretical and computational predictions based on the partial-wave expansion and finite-element methods. Our results may foster the design of simple lens elements for super-resolution acoustic microscopy and ultrasound imaging. Режим доступа: по договору с организацией-держателем ресурса |
| Idioma: | anglès |
| Publicat: |
2017
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| Matèries: | |
| Accés en línia: | https://doi.org/10.1103/PhysRevApplied.8.024013 |
| Format: | MixedMaterials Electrònic Capítol de llibre |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=656486 |
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| 200 | 1 | |a Focusing Acoustic Beams with a Ball-Shaped Lens beyond the Diffraction Limit |f J. N. Lopes [et al.] | |
| 203 | |a Text |c electronic | ||
| 300 | |a Title screen | ||
| 320 | |a [References: 26 tit.] | ||
| 330 | |a We report on measurements of a subwavelength focusing of an ultrasound beam by a polymer ball-shaped lens (Rexolite) immersed in water at room temperature. The beam arises in the near field of the ball-lens shadow side. Considering a 8.2λ-diameter ball lens, with λ being the wavelength, we find a superfocused beam with 14.4-dB-intensity gain, a full width and a full length at half maximum of λ/2and 2.2λ, respectively, and sidelobes under −10 dB. The observed phenomenon is in excellent agreement with the theoretical and computational predictions based on the partial-wave expansion and finite-element methods. Our results may foster the design of simple lens elements for super-resolution acoustic microscopy and ultrasound imaging. | ||
| 333 | |a Режим доступа: по договору с организацией-держателем ресурса | ||
| 461 | |t Physical Review Applied |d 1958- | ||
| 463 | |t Vol. 8, iss. 2 |v [024013, 7 p.] |d 2017 | ||
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a труды учёных ТПУ | |
| 610 | 1 | |a акустические поля | |
| 610 | 1 | |a линзы | |
| 610 | 1 | |a дифракция | |
| 701 | 1 | |a Lopes |b J. N. | |
| 701 | 1 | |a Andrade |b M. A. B. | |
| 701 | 1 | |a Leao-Neto |b J. P. | |
| 701 | 1 | |a Adamowski |b J. C. | |
| 701 | 1 | |a Minin |b I. V. |c physicist |c Senior researcherof Tomsk Polytechnic University, Doctor of technical sciences |f 1960- |g Igor Vladilenovich |3 (RuTPU)RU\TPU\pers\37571 | |
| 701 | 1 | |a Silva |b G. T. | |
| 712 | 0 | 2 | |a Национальный исследовательский Томский политехнический университет |c (2009- ) |9 26305 |
| 801 | 2 | |a RU |b 63413507 |c 20171115 |g RCR | |
| 856 | 4 | |u https://doi.org/10.1103/PhysRevApplied.8.024013 | |
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