Journal article
Optically excited nanoscale ultrasonic transducers
The Journal of the Acoustical Society of America, Vol.137(1), pp.219-227
01/2015
DOI: 10.1121/1.4904487
PMID: 25618053
Abstract
In order to work at higher ultrasonic frequencies, for instance, to increase the resolution, it is necessary to fabricate smaller and higher frequency transducers. This paper presents an ultrasonic transducer capable of being made at a very small size and operated at GHz frequencies. The transducers are activated and read optically using pulsed lasers and without physical contact between the instrumentation and the transducer. This removes some of the practical impediments of traditional piezoelectric architectures (such as wiring) and allows the devices to be placed immediately on or within samples, reducing the significant effect of attenuation which is very strong at frequencies above 1 GHz. The transducers presented in this paper exploit simultaneous optical and mechanical resonances to couple the optical input into ultrasonic waves and vice versa. This paper discusses the mechanical and optical design of the devices at a modest scale (a few μm) and explores the scaling of the transducers toward the sub-micron scale. Results are presented that show how the transducers response changes depending on its local environment and how the resonant frequency shifts when the transducer is loaded by a printed protein sample.
Details
- Title: Subtitle
- Optically excited nanoscale ultrasonic transducers
- Creators
- Richard J Smith - Electrical Systems and Optics Research Division, University of Nottingham, University Park, Nottingham, NG7 2RD, United KingdomFernando Perez Cota - Electrical Systems and Optics Research Division, University of Nottingham, University Park, Nottingham, NG7 2RD, United KingdomLeonel Marques - Electrical Systems and Optics Research Division, University of Nottingham, University Park, Nottingham, NG7 2RD, United KingdomXuesheng Chen - Electrical Systems and Optics Research Division, University of Nottingham, University Park, Nottingham, NG7 2RD, United KingdomAhmet Arca - Department of Electric and Electronic Engineering, Faculty of Architecture and Engineering, European University of Lefke, Gemikonagi, Mersin 10, TurkeyKevin Webb - Electrical Systems and Optics Research Division, University of Nottingham, University Park, Nottingham, NG7 2RD, United KingdomJonathon Aylott - School of Pharmacy, University of Nottingham, United KingdomMicheal G Somekh - Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Kowloon, Hong KongMatt Clark - Electrical Systems and Optics Research Division, University of Nottingham, University Park, Nottingham, NG7 2RD, United Kingdom
- Resource Type
- Journal article
- Publication Details
- The Journal of the Acoustical Society of America, Vol.137(1), pp.219-227
- DOI
- 10.1121/1.4904487
- PMID
- 25618053
- NLM abbreviation
- J Acoust Soc Am
- ISSN
- 0001-4966
- eISSN
- 1520-8524
- Publisher
- American Institute of Physics; United States
- Language
- English
- Date published
- 01/2015
- Academic Unit
- Roy J. Carver Department of Biomedical Engineering; Molecular Physiology and Biophysics; Anatomy and Cell Biology; Stead Family Department of Pediatrics; Iowa Neuroscience Institute; Otolaryngology; Internal Medicine
- Record Identifier
- 9984007296502771
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