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Professor Martin Booth

Professor

Martin Booth MEng DPhil

Statutory Professor of Electrical Engineering

Chair of Optical and Photonic Engineering

Biography

Professor Martin Booth read for a degree in Engineering Science at Hertford College, Oxford, from 1993-7. His doctoral work in adaptive optics for confocal microscopy took place in the Department of Engineering Science at the University of Oxford from 1997-2001, during which time he was also a member of Jesus College.

In 2001, Martin was elected to a Junior Research Fellowship at Christ Church and in 2003 was appointed a Royal Academy of Engineering/EPSRC Research Fellow. In 2007 he was awarded a five-year EPSRC Advanced Research Fellowship and was concurrently elected to a Hugh Price Fellowship at Jesus College.

He became Professor of Engineering Science and Senior Research Fellow at Jesus College in 2014. He also holds a College Lecturership at Lincoln College. His current research interests centre on the development of new dynamic optical methods for applications ranging from biomedical imaging to laser-based manufacturing.

In 2023 he was appointed as the Department’s new Statutory Professor of Electrical Engineering and Chair in Optical and Photonic Engineering, with a Fellowship at St Hugh’s College.

Awards

  • Young Researcher Award in Optical Technologies” from the School of Advanced Optical Technologies at the University of Erlangen-Nürnberg, 2012
  • International Commission for Optics Prize, 2014

External Positions

  • Visiting Professor, School of Advanced Optical Technologies at the University of Erlangen-Nürnberg, 2012-present
  • Fellow, Optical Society (OSA), 2017
  • Fellow, SPIE, 2021
  • Fellow, Institute of Physics, 2021

 

Current Projects

Adaptive optics for microscopy

The imaging quality of a high-resolution microscope is severely compromised when aberrations are present in the optical system. These aberrations lead to reduced signal level and degraded lateral and, more significantly, axial resolution. Often aberrations are introduced not only by misalignment of optical components in the microscope but also by variations in refractive index of the specimen itself. Martin's group are developing adaptive optics systems to overcome these limitations. They have implemented adaptive optics in a range of microscopes and have demonstrated the benefits of aberration correction, showing improved contrast and resolution when imaging deep within specimens.

Biomedical microscopy

Many applications of high resolution microscopes are in the biological sciences. Research includes advances in the technology of confocal and two-photon fluorescence microscopes, harmonic generation microscopes and other high resolution methods. This group has numerous collaborations with other researchers across Oxford for applications including cell biology, developmental biology and neuroscience.

Superresolution microscopy

Superresolution microscopy - or nanoscopy - enables visualisation of objects much smaller than the physical diffraction limit of light. These methods are regularly used in biological applications to resolve features in the tens of nanometres range. They are working on new methods for nanoscopy and in particular on the development of dynamic optics to extend the usability of this approach in practical applications. Their work includes technology and applications for stimulated emission depletion (STED) microscopy, single molecule switching methods (such as STORM, PALM, etc.) and structured illumination microscopy.

Adaptive laser fabrication

The high intensity in a tightly focussed laser beam can cause material modification that is well confined within three-dimensions. This provides the capability of fabricating 3D structures within transparent substrates. However, this usually requires focussing into high refractive index materials, which leads to significant aberrations that distort the focus. Since the size of fabricated features depends upon the shape of the focus, aberrations must be corrected for precision to be maintained. They are developing adaptive optics for the measurement and correction of these aberrations for machining applications.

Dynamic parallel laser machining

Many direct laser writing systems rely upon the sequential exposure of the workpiece in a point-by-point fashion. This permits high precision fabrication, but at the expense of long processing times, especially when working in three dimensions. They have developed dynamic optical methods, using liquid crystal spatial light modulators to parallelise the laser writing process by creating multiple, individually controllable foci. This has been combined with aberration correction to maintain precision throughout a three-dimensional
structure.

Diamond photonics

Diamond is an important material with many properties that make it useful across a wide range of engineering and scientific applications. They are developing methods for the processing of diamond and various applications ranging from quantum optics to biological sensing. In particular, adaptive optical laser fabrication methods enable the creation of structures deep within diamond crystals, including graphitic conductors. They are also using crystallographic defects, such as the nitrogen-vacancy colour centre, as electromagnetic sensors for detection of neural activity. This is a particularly powerful method when combined with super-resolution microscopy.

DPhil Opportunities

I am interested to hear from potential students who have interests in any of our research areas.

Publications

Ultrafast laser-writing of liquid crystal waveguides

Chen B, Xie P, Zhao Z, Salter PS, Li M et al. (2024), Ultrafast Science

Altmetric score is
BibTeX View PDF
@article{ultrafastlaserw-2024/6,
  title={Ultrafast laser-writing of liquid crystal waveguides},
  author={Chen B, Xie P, Zhao Z, Salter PS, Li M et al.},
  journal={Ultrafast Science},
  publisher={American Association for the Advancement of Science},
  year = "2024"
}

Optimization of single-mode sapphire waveguide Bragg gratings

Wang M, Salter PS, Payne F, Liu T, Shipley A et al. (2024), Journal of Lightwave Technology, 1-10

Altmetric score is
BibTeX View PDF
@article{optimizationofs-2024/5,
  title={Optimization of single-mode sapphire waveguide Bragg gratings},
  author={Wang M, Salter PS, Payne F, Liu T, Shipley A et al.},
  journal={Journal of Lightwave Technology},
  pages={1-10},
  publisher={IEEE},
  year = "2024"
}

Continuously tuneable single electrode pair liquid crystal optical vortex generators

Nourshagh C, Xu A, Salter PS, Booth MJ, Elston SJ et al. (2024), Nanophotonics

Altmetric score is
BibTeX View PDF
@article{continuouslytun-2024/4,
  title={Continuously tuneable single electrode pair liquid crystal optical vortex generators},
  author={Nourshagh C, Xu A, Salter PS, Booth MJ, Elston SJ et al.},
  journal={Nanophotonics},
  publisher={De Gruyter},
  year = "2024"
}

Fast, Precise, High Contrast Laser Writing for Photonic Chips with Phase Aberrations

Sun B, Moser S, Jesacher A, Salter PS, Thomson RR et al. (2024), Laser & Photonics Reviews

Altmetric score is
BibTeX View PDF
@article{fastprecisehigh-2024/4,
  title={Fast, Precise, High Contrast Laser Writing for Photonic Chips with Phase Aberrations},
  author={Sun B, Moser S, Jesacher A, Salter PS, Thomson RR et al.},
  journal={Laser & Photonics Reviews},
  publisher={Wiley},
  year = "2024"
}

Speckle reduction in interferometry using tuneable liquid crystal diffusers

Pathak B, Spiller N, Elston SJ, Booth MJ & Morris SM (2024), 44

Altmetric score is
BibTeX View PDF
@inproceedings{specklereductio-2024/3,
  title={Speckle reduction in interferometry using tuneable liquid crystal diffusers},
  author={Pathak B, Spiller N, Elston SJ, Booth MJ & Morris SM},
  booktitle={Emerging Liquid Crystal Technologies XIX},
  pages={44},
  year = "2024"
}

Shack–Hartmann wavefront sensing using printed liquid crystal microlens arrays

Pathak B, Kamal W, Elston SJ, Castrejón-Pita AA, Booth MJ et al. (2024), 29

Altmetric score is
BibTeX View PDF
@inproceedings{shackhartmannwa-2024/3,
  title={Shack–Hartmann wavefront sensing using printed liquid crystal microlens arrays},
  author={Pathak B, Kamal W, Elston SJ, Castrejón-Pita AA, Booth MJ et al.},
  booktitle={Emerging Liquid Crystal Technologies XIX},
  pages={29},
  year = "2024"
}

Large laser written liquid crystal devices for spherical aberration correction

Xu A, Nourshargh C, Salter PS, Elston SJ, Morris SM et al. (2024), Proceedings of SPIE--the International Society for Optical Engineering, 12907, 129070f-129070f-6

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BibTeX View PDF
@inproceedings{largelaserwritt-2024/3,
  title={Large laser written liquid crystal devices for spherical aberration correction},
  author={Xu A, Nourshargh C, Salter PS, Elston SJ, Morris SM et al.},
  booktitle={Emerging Liquid Crystal Technologies XIX},
  pages={129070f-129070f-6},
  year = "2024"
}

Modal phase modulators based on liquid crystals with 3D-printed polymer microstructures: increasing size and complexity

Xu A, Nourshargh C, Salter P, Elston S, Morris S et al. (2024), Photonics, 11(3)

Altmetric score is
BibTeX View PDF
@article{modalphasemodul-2024/3,
  title={Modal phase modulators based on liquid crystals with 3D-printed polymer microstructures: increasing size and complexity},
  author={Xu A, Nourshargh C, Salter P, Elston S, Morris S et al.},
  journal={Photonics},
  volume={11},
  number={266},
  publisher={MDPI},
  year = "2024"
}

Large laser written liquid crystal devices for spherical aberration correction

Xu A, Nourshargh C, Salter PS, Elston SJ, Morris SM et al. (2024), Progress in Biomedical Optics and Imaging, 12851, 1285105-1285105-6

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BibTeX View PDF
@inproceedings{largelaserwritt-2024/3,
  title={Large laser written liquid crystal devices for spherical aberration correction},
  author={Xu A, Nourshargh C, Salter PS, Elston SJ, Morris SM et al.},
  booktitle={Adaptive Optics and Wavefront Control for Biological Systems X},
  pages={1285105-1285105-6},
  year = "2024"
}

Direct access to optical aberration information in fluorescence laser scanning microscopy using detector arrays

Fersini F, Zunino A, Morerio P, Del Bue A, Booth MJ et al. (2024), Progress in Biomedical Optics and Imaging, 12851, 1285102-1285102

Altmetric score is
BibTeX View PDF
@inproceedings{directaccesstoo-2024/3,
  title={Direct access to optical aberration information in fluorescence laser scanning microscopy using detector arrays},
  author={Fersini F, Zunino A, Morerio P, Del Bue A, Booth MJ et al.},
  booktitle={Adaptive Optics and Wavefront Control for Biological Systems X},
  pages={1285102-1285102},
  year = "2024"
}
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