Difference between revisions of "Richard Smith"
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| − | <bibtex>@ | + | <bibtex>@proceeding{doi:10.1117/12.886892,author = {Light Roger A. and Smith Richard J. and Johnston Nicholas S. and Somekh Michael G. and Pitter Mark C.},title = {CMOS lock-in optical sensor for parallel detection in pump-probe systems},journal = {Proc. SPIE},volume = {8073},number = {},pages = {807304-807304-10},abstract = {In pump-probe type experiments the signal of interest is often a very small fraction of the overall light intensity reaching the detector. This is beyond the capabilities of conventional cameras due to the necessarily high light intensity at the detector and its limited dynamic range. To overcome these problems, phase-sensitive or lock-in detection with a single photodiode is generally used. In phase-sensitive detection, the pump beam is modulated and the probe beam is captured with a photodiode connected to a lock-in amplifier running from the same reference. This provides very narrowband detection and moves the signal away from low frequency noise. We have developed a linear array detector that can perform shot-noise limited lock-in detection in 256 parallel channels. Each pixel has four independent wells to allow phase-sensitive detection. The depth of each well is massively increased and can be controlled on a per-pixel basis allowing the gain of the sensor to be matched to the incident light intensity, improving noise performance. The array reduces the number of dimensions that need to be sequentially scanned and so greatly speeds up acquisition. Results demonstrating spectral parallelism in pump-probe experiments are presented where the a.c. amplitude to background ratio approaches 1 part in one million.},year = {2011},doi = {10.1117/12.886892},URL = { http://dx.doi.org/10.1117/12.886892},eprint = {}} |
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Revision as of 08:12, 10 October 2013
Richard Smith
|
Electronic engineer, specialities: optics, microscopy, femtoseconds lasers, ps ultrasonics. I completed my PhD in Electrical and Electronic Engineering in 2006 at the UoN. My early work focused on optical metrology and signal processing techniques to enable precise measurements to be made below the optical diffraction limit. I have been developing several picosecond ultrasonic systems at UoN, and have successfully developed a parallel detection scheme that has increased the data acquisition rate by over an order of magnitude compared with the traditional detector approach. Current research themes are developing instrumentation to provide true orientation imaging of material microstructure in primarily aerospace materials, and developing high frequency ultrasonic transducers for biological applications.
Location: Biology Building B18 or lab B5 and SIOS main office, ASOPS lab
Email: Richard.j.smith@nottingham.ac.uk
Phone: (0115) 9515556 (office)
Research Projects
MRC DPFS Label-free, ultra-sensitive, high-throughput screening for early detection and monitoring of Alzheimer's disease (AD).
SRAS for materials characterisation
Nanoscale Ultrasonic Transducers
Exotic Ultrasonics for the real world
Awards
Winner of best contributed paper at the Rank Prize Funds mini symposia on 'optical aspects of NDT' 19-22nd May 2008, for my talk entitled ‘Parallel ultrafast ultrasonics’.
Peer Reviewed Publications
Smith R, Sharples S, Li W, Clark M, Somekh M - Orientation imaging using spatially resolved acoustic spectroscopy
- Journal of Physics: Conference Series 353:012003, @mar 2012
- http://iopscience.iop.org/1742-6596/353/1/012003
BibtexAuthor : Smith R, Sharples S, Li W, Clark M, Somekh M
Title : Orientation imaging using spatially resolved acoustic spectroscopy
In : Journal of Physics: Conference Series -
Address :
Date : @mar 2012
Smith R, Arca A, Chen X, Marques L, Clark M, Aylott J, Somekh M - Design and fabrication of nanoscale ultrasonic transducers
- Journal of Physics: Conference Series 353:012001, @mar 2012
- http://iopscience.iop.org/1742-6596/353/1/012001
Bibtex<div>Author : Smith R, Arca A, Chen X, Marques L, Clark M, Aylott J, Somekh M
Title : Design and fabrication of nanoscale ultrasonic transducers
In : Journal of Physics: Conference Series -
Address :
Date : @mar 2012
</div>
Li Wenqi, Sharples Steve D., Smith Richard J., Clark Matt, Somekh Michael G. - Determination of crystallographic orientation of large grain metals with surface acoustic waves
- The Journal of the Acoustical Society of America 132(2):738--745,2012
- http://link.aip.org/link/?JAS/132/738/1
Bibtex<div>Author : Li Wenqi, Sharples Steve D., Smith Richard J., Clark Matt, Somekh Michael G.
Title : Determination of crystallographic orientation of large grain metals with surface acoustic waves
In : The Journal of the Acoustical Society of America -
Address :
Date : 2012
</div>
Smith R, Arca A, Chen X, Marques L, Clark M, Aylott J, Somekh M - Design and fabrication of ultrasonic transducers with nanoscale dimensions
- Journal of Physics: Conference Series 278:012035, @jan 2011
- http://iopscience.iop.org/1742-6596/278/1/012035
Bibtex<div>Author : Smith R, Arca A, Chen X, Marques L, Clark M, Aylott J, Somekh M
Title : Design and fabrication of ultrasonic transducers with nanoscale dimensions
In : Journal of Physics: Conference Series -
Address :
Date : @jan 2011
</div>
Sharples S. D., Clark M., Smith R. J., Ellwood R. J., Li W., Somekh M. G. - Laser ultrasonic microscopy
- Nondestructive Testing and Evaluation 26(3-4):367--384,2011
- http://www.tandfonline.com/doi/abs/10.1080/10589759.2011.577429
Bibtex<div>Author : Sharples S. D., Clark M., Smith R. J., Ellwood R. J., Li W., Somekh M. G.
Title : Laser ultrasonic microscopy
In : Nondestructive Testing and Evaluation -
Address :
Date : 2011
</div>
Arca Ahmet, Aylott Jon, Marques Leonel, Clark Matt, Somekh Mike, Smith Richard, Sharples Steve, Stratoudaki Teti, Chen Xuesheng - CHOTs optical transducers
- Nondestructive Testing and Evaluation 26(3-4):353--366,2011
- http://www.tandfonline.com/doi/abs/10.1080/10589759.2011.573555
Bibtex<div>Author : Arca Ahmet, Aylott Jon, Marques Leonel, Clark Matt, Somekh Mike, Smith Richard, Sharples Steve, Stratoudaki Teti, Chen Xuesheng
Title : CHOTs optical transducers
In : Nondestructive Testing and Evaluation -
Address :
Date : 2011
</div>
A Arca, T Stratoudaki, R Smith, M Clark, M G Somekh - Evanescent CHOTs for the optical generation and detection of ultrahigh frequency {SAWs}
- Journal of Physics: Conference Series 269:012012,2011
- http://iopscience.iop.org/1742-6596/269/1/012012
Bibtex<div>Author : A Arca, T Stratoudaki, R Smith, M Clark, M G Somekh
Title : Evanescent CHOTs for the optical generation and detection of ultrahigh frequency {SAWs}
In : Journal of Physics: Conference Series -
Address :
Date : 2011
</div>
R Smith, A Arca, X Chen, L Marques, M Clark, J Aylott, M Somekh - Design and fabrication of ultrasonic transducers with nanoscale dimensions
- Journal of Physics: Conference Series 278:012035,2011
- http://iopscience.iop.org/1742-6596/278/1/012035
Bibtex<div>Author : R Smith, A Arca, X Chen, L Marques, M Clark, J Aylott, M Somekh
Title : Design and fabrication of ultrasonic transducers with nanoscale dimensions
In : Journal of Physics: Conference Series -
Address :
Date : 2011
</div>
R J Smith, R A Light, N Johnston, S Sharples, M C Pitter, M G Somekh - Parallel detection in laser ultrasonics
- Journal of Physics: Conference Series 214:012006,2010
- http://dx.doi.org/10.1088/1742-6596/214/1/012006
Bibtex<div>Author : R J Smith, R A Light, N Johnston, S Sharples, M C Pitter, M G Somekh
Title : Parallel detection in laser ultrasonics
In : Journal of Physics: Conference Series -
Address :
Date : 2010
</div>
Richard J. Smith, Roger A. Light, Steve D. Sharples, Nicholas S. Johnston, Mark C. Pitter, Mike G. Somekh - Multichannel, time-resolved picosecond laser ultrasound imaging and spectroscopy with custom complementary metal-oxide-semiconductor detector
- Review of Scientific Instruments 81(2):024901,2010
- http://dx.doi.org/10.1063/1.3298606
Bibtex<div>Author : Richard J. Smith, Roger A. Light, Steve D. Sharples, Nicholas S. Johnston, Mark C. Pitter, Mike G. Somekh
Title : Multichannel, time-resolved picosecond laser ultrasound imaging and spectroscopy with custom complementary metal-oxide-semiconductor detector
In : Review of Scientific Instruments -
Address :
Date : 2010
</div>
R J Smith, M G Somekh, S D Sharples, M C Pitter, I Harrison - Parallel detection of low modulation depth signals: application to picosecond ultrasonics
- Measurement Science and Technology 19(5):055301,2008
- http://dx.doi.org/10.1088/0957-0233/19/5/055301
Bibtex<div>Author : R J Smith, M G Somekh, S D Sharples, M C Pitter, I Harrison
Title : Parallel detection of low modulation depth signals: application to picosecond ultrasonics
In : Measurement Science and Technology -
Address :
Date : 2008
</div>
RJ Smith, CW See, MG Somekh - Use of artificial neural networks on optical track width measurements
- APPLIED OPTICS 46(22):4857--4866,2007
- Bibtex<div>Author : RJ Smith, CW See, MG Somekh
Title : Use of artificial neural networks on optical track width measurements
In : APPLIED OPTICS -
Address :
Date : 2007
</div>
R J Smith, C W See, M G Somekh - Optical track width measurements below 100 nm using artificial neural networks
- Measurement Science and Technology 16(12):2397--2404,2005
- http://dx.doi.org/10.1088/0957-0233/16/12/001
Bibtex<div>Author : R J Smith, C W See, M G Somekh
Title : Optical track width measurements below 100 nm using artificial neural networks
In : Measurement Science and Technology -
Address :
Date : 2005
</div>
Non Peer Review Papers
Light Roger A., Smith Richard J., Johnston Nicholas S., Somekh Michael G., Pitter Mark C. - CMOS lock-in optical sensor for parallel detection in pump-probe systems
- ,2011
- http://dx.doi.org/10.1117/12.886892
Bibtex<div>Author : Light Roger A., Smith Richard J., Johnston Nicholas S., Somekh Michael G., Pitter Mark C.
Title : CMOS lock-in optical sensor for parallel detection in pump-probe systems
In : -
Address :
Date : 2011
</div>
Roger A. Light, Richard J. Smith, Nicholas S. Johnston, Steve D. Sharples, Michael G. Somekh, Mark C. Pitter - Highly parallel CMOS lock-in optical sensor array for hyperspectral recording in scanned imaging systems
- pp. 75700U--75700U-10, San Francisco, California, {USA},2010
- http://dx.doi.org/10.1117/12.842083
Bibtex<div>Author : Roger A. Light, Richard J. Smith, Nicholas S. Johnston, Steve D. Sharples, Michael G. Somekh, Mark C. Pitter
Title : Highly parallel CMOS lock-in optical sensor array for hyperspectral recording in scanned imaging systems
In : -
Address : San Francisco, California, {USA}
Date : 2010
</div>
Ahmet Arca, Theodosia Stratoudaki, Richard J Smith, Matt Clark, Mike Somekh - Evanescent CHOTs for the optical generation and detection of ultra-high frequency SAWs
- 2009 IEEE International Ultrasonics Symposium pp. 2213 - 2216,2009
- BibtexAuthor : Ahmet Arca, Theodosia Stratoudaki, Richard J Smith, Matt Clark, Mike Somekh
Title : Evanescent CHOTs for the optical generation and detection of ultra-high frequency SAWs
In : 2009 IEEE International Ultrasonics Symposium -
Address :
Date : 2009
Richard Smith, Mike Somekh, Steve Sharples, Mark Pitter, Roger Light, Nicholas Johnston - Parallel detection in picosecond ultrasonics with both commercial and custom array detection
- 1st International Symposium on Laser Ultrasonics: Science, Technology and Applications ,2008
- http://www.ndt.net/article/laser-ut2008/toc.php
BibtexAuthor : Richard Smith, Mike Somekh, Steve Sharples, Mark Pitter, Roger Light, Nicholas Johnston
Title : Parallel detection in picosecond ultrasonics with both commercial and custom array detection
In : 1st International Symposium on Laser Ultrasonics: Science, Technology and Applications -
Address :
Date : 2008
Chung W. See, Richard J. Smith, Michael G. Somekh - Line width measurement below 60 nm using an optical interferometer and artificial neural network
- Proceedings of SPIE pp. 65181F--65181F-11, San Jose, {CA,} {USA},2007
- http://dx.doi.org/10.1117/12.712278
BibtexAuthor : Chung W. See, Richard J. Smith, Michael G. Somekh
Title : Line width measurement below 60 nm using an optical interferometer and artificial neural network
In : Proceedings of SPIE -
Address : San Jose, {CA,} {USA}
Date : 2007
Richard J. Smith, Chung W. See, Michael G. Somekh - Sub-0.1 ?m optical track width measurement
- Proceedings of SPIE pp. 58580M--58580M-8, Munich, Germany,2005
- http://dx.doi.org/10.1117/12.611999
BibtexAuthor : Richard J. Smith, Chung W. See, Michael G. Somekh
Title : Sub-0.1 ?m optical track width measurement
In : Proceedings of SPIE -
Address : Munich, Germany
Date : 2005
Posters
Richard Smith - Set for Britain 2011 London
- Technical Report - Poster, The University of Nottingham ,2011
- BibtexAuthor : Richard Smith
Title : Set for Britain 2011 London
In : Technical Report - Poster, The University of Nottingham -
Address :
Date : 2011
Richard Smith - LU2008 2008 Montreal
- Technical Report - Poster, The University of Nottingham ,2008
- BibtexAuthor : Richard Smith
Title : LU2008 2008 Montreal
In : Technical Report - Poster, The University of Nottingham -
Address :
Date : 2008
Richard Smith - Frontiers in interface Physics 2010
- Technical Report - Poster, The University of Nottingham ,2010
- BibtexAuthor : Richard Smith
Title : Frontiers in interface Physics 2010
In : Technical Report - Poster, The University of Nottingham -
Address :
Date : 2010
Talks
Richard Smith - AFPAC 2011 Frejus
- Technical Report - Talk, The University of Nottingham ,2011
- BibtexAuthor : Richard Smith
Title : AFPAC 2011 Frejus
In : Technical Report - Talk, The University of Nottingham -
Address :
Date : 2011
Richard Smith - LU2010 2010 Bordeaux
- Technical Report - Talk, The University of Nottingham ,2010
- BibtexAuthor : Richard Smith
Title : LU2010 2010 Bordeaux
In : Technical Report - Talk, The University of Nottingham -
Address :
Date : 2010
Richard Smith - IOP 2009 Coventry
- Technical Report - Talk, The University of Nottingham ,2009
- BibtexAuthor : Richard Smith
Title : IOP 2009 Coventry
In : Technical Report - Talk, The University of Nottingham -
Address :
Date : 2009
Richard Smith - RCNDE ESR 2009 Warwick
- Technical Report - Talk, The University of Nottingham ,2009
- BibtexAuthor : Richard Smith
Title : RCNDE ESR 2009 Warwick
In : Technical Report - Talk, The University of Nottingham -
Address :
Date : 2009
Richard Smith - Rank Prize Funds 2008 Grasmere
- Technical Report - Talk, The University of Nottingham ,2008
- BibtexAuthor : Richard Smith
Title : Rank Prize Funds 2008 Grasmere
In : Technical Report - Talk, The University of Nottingham -
Address :
Date : 2008
Richard Smith - Acoustics 08 2008 Paris
- Technical Report - Talk, The University of Nottingham ,2008
- BibtexAuthor : Richard Smith
Title : Acoustics 08 2008 Paris
In : Technical Report - Talk, The University of Nottingham -
Address :
Date : 2008
Richard Smith - SPIE Metrology 2005 Munich
- Technical Report - Talk, The University of Nottingham ,2005
- BibtexAuthor : Richard Smith
Title : SPIE Metrology 2005 Munich
In : Technical Report - Talk, The University of Nottingham -
Address :
Date : 2005
