Dr. Patrick S. Salter Profile

Dr. Patrick S. Salter

Lecturer at Univ of Oxford

SPIE Involvement:

Author

Publications (30)

Proceedings Article | 13 March 2024 Poster + Paper

Large laser written liquid crystal devices for spherical aberration correction

Alec Xu, Camron Nourshargh, Patrick Salter, Steve Elston, Stephen Morris, Martin Booth

Proceedings Volume 12907, 129070F (2024) https://doi.org/10.1117/12.2692879

KEYWORDS: Polymers, Liquid crystals, Refractive index, Spherical lenses, Adaptive optics, Polymerization, Monochromatic aberrations, Manufacturing, Electrodes, Aberration correction

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Proceedings Article | 13 March 2024 Presentation

Tuneable multi-order liquid crystal vortex beam generators

Camron Nourshargh, Alec Xu, Patrick Salter, Chao He, Martin Booth, Steve Elston, Stephen Morris

Proceedings Volume PC12907, PC129070O (2024) https://doi.org/10.1117/12.3002530

KEYWORDS: Liquid crystals, Optical vortices, Polarization imaging, Spiral phase plates, Two photon polymerization, Switching, Structural design, Spherical lenses, Polymers, Polarization

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Proceedings Article | 13 March 2024 Presentation

Adaptive laser writing for three-dimensional fabrication of functional devices

Martin J. Booth, Patrick Salter

Proceedings Volume PC12898, PC128980J (2024) https://doi.org/10.1117/12.3004220

KEYWORDS: Fabrication, Pulsed laser operation, Optical aberrations, Adaptive optics, Waveguides, Ultrafast phenomena, Sensors, Refraction, Manufacturing, Liquid crystals

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Proceedings Article | 12 March 2024 Presentation + Paper

Large laser written liquid crystal devices for spherical aberration correction

Alec Xu, Camron Nourshargh, Patrick Salter, Steve Elston, Stephen Morris, Martin Booth

Proceedings Volume 12851, 1285105 (2024) https://doi.org/10.1117/12.2692878

KEYWORDS: Polymers, Liquid crystals, Refractive index, Spherical lenses, Adaptive optics, Polymerization, Monochromatic aberrations, Manufacturing, Electrodes, Aberration correction

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Proceedings Article | 12 March 2024 Presentation + Paper

Laser written nitrogen vacancy centers in diamond integrated with transfer print GaN solid immersion lenses

Xingrui Cheng, Nils Kolja Wessling, Saptarsi Ghosh, Andrew Kirkpatrick, Menno Kappers, Yashna N. Lekhai, Gavin Morley, Rachel Oliver, Martin Dawson, Jason Smith, Patrick Salter, Michael Strain

Proceedings Volume 12874, 1287405 (2024) https://doi.org/10.1117/12.3000474

KEYWORDS: Gallium nitride, Objectives, Diamond, Printing, Lenses, Quantum emitters, Nitrogen, Solids, Photoluminescence, Fabrication

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Proceedings Article | 5 October 2023 Presentation

Laser written stretchable diffractive optic elements in polymerizable liquid crystal gels

Bohan Chen, Zimo Zhao, Camron Nourshargh, Chao He, Patrick Salter, Martin Booth, Steve Elston, Stephen Morris

Proceedings Volume PC12658, PC1265807 (2023) https://doi.org/10.1117/12.2672466

KEYWORDS: Liquid crystals, Ultraviolet radiation, Optical components, Diffraction gratings, Simulations, Polymers, Polymer optics, Optical alignment, Refractive index, Optical gratings

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SPIE Journal Paper | 20 April 2023 Open Access

Direct laser-written aperiodic photonic volume elements for complex light shaping with high efficiency: inverse design and fabrication

Nicolas Barré, Ravi Shivaraman, Simon Moser, Patrick Salter, Michael Schmidt, Martin J. Booth, Alexander Jesacher

APN, Vol. 2, Issue 03, 036006, (April 2023) https://doi.org/10.1117/12.10.1117/1.APN.2.3.036006

KEYWORDS: Voxels, Design and modelling, Multiplexing, Manufacturing, Glasses, Fabrication, Mouth, Holograms, Head, Diffraction

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Proceedings Article | 17 March 2023 Presentation

Laser written waveguides with engineered cross-section

Patrick Salter, Bangshan Sun, Zhi Kai Pong, Martin Booth

Proceedings Volume PC12411, PC124110N (2023) https://doi.org/10.1117/12.2655961

KEYWORDS: Waveguides, Spatial resolution, Polarization, Monochromatic aberrations, Liquid crystals, Light wave propagation, Glasses, Ferroelectric materials, Femtosecond phenomena, Control systems

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Proceedings Article | 17 March 2023 Presentation + Paper

Laser processing and electrical analysis of embedded graphitic wires in diamond

Marta Krüger, Martin Booth, Patrick Salter

Proceedings Volume 12411, 124110D (2023) https://doi.org/10.1117/12.2649050

KEYWORDS: Diamond, Fabrication, Electrical properties, Resistance, Laser processing, Electrical conductivity

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Proceedings Article | 17 March 2023 Presentation

Laser direct writing in diamond for quantum technology

Patrick Salter

Proceedings Volume PC12408, PC1240806 (2023) https://doi.org/10.1117/12.2653133

KEYWORDS: Diamond, Laser applications, Ultrafast phenomena, Quantum communications, Wide bandgap semiconductors, Silicon carbide, Manufacturing, Laser processing, Control systems, Color centers

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SPIE Journal Paper | 10 March 2022 Open Access

Revealing complex optical phenomena through vectorial metrics

Chao He, Jintao Chang, Patrick Salter, Yuanxing Shen, Ben Dai, Pengcheng Li, Yihan Jin, Samlan Chandran Thodika, Mengmeng Li, Tariq Aziz, Jingyu Wang, Jacopo Antonello, Yang Dong, Ji Qi, Jianyu Lin, Daniel Elson, Min Zhang, Honghui He, Hui Ma, Martin J. Booth

AP, Vol. 4, Issue 02, 026001, (March 2022) https://doi.org/10.1117/12.10.1117/1.AP.4.2.026001

KEYWORDS: Waveguides, Optical properties, GRIN lenses, Wave plates, Tissues, Polarization, Lung, Multilayers, Complex systems, Data hiding

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Proceedings Article | 5 March 2022 Presentation

Refractive index tomography of direct fs-laser written waveguides

Nicolas Barré, Ravi Shivaraman, Lisa Ackermann, Simon Moser, Michael Schmidt, Patrick Salter, Martin Booth, Alexander Jesacher

Proceedings Volume PC12012, PC1201203 (2022) https://doi.org/10.1117/12.2616407

KEYWORDS: Waveguides, Tomography, Refractive index, Reconstruction algorithms, Pulsed laser operation, Profiling, Optical simulations, Optical aberrations, Multiphoton lithography, Integrated photonics

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Proceedings Article | 9 March 2020 Presentation

Engineering laser induced periodic surface structures on single crystal diamond (Conference Presentation)

Ravi Shivaraman, Patrick Salter

Proceedings Volume 11268, 112680V (2020) https://doi.org/10.1117/12.2544983

KEYWORDS: Diamond, Crystals, Laser crystals, Femtosecond phenomena, Crystal optics, Optical components, Modulation, Singular optics, Objectives, Scanning electron microscopy

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Proceedings Article | 4 March 2019 Presentation

Towards an efficient spin-photon interface with near-deterministically engineered defects in diamond

Laiyi Weng, Sam Johnson, Paul Hill, Hangyu Liu, Yu-chen Chen, Ben Griffiths, Shannon Nicley, Shazeaa Ishmael, Colin Stephen, Yashna Lekhai, Ben Green, Aurelien A. Trichet, Patrick Salter, Martin Booth, Erdan Gu, Gavin Morley, Martin Newton, Jason Smith

Proceedings Volume 10933, 109330E (2019) https://doi.org/10.1117/12.2507298

KEYWORDS: Diamond, Interfaces, Quantum communications, Quantum networks, Optical networks, Nitrogen, Diffusion, Laser processing, Laser systems engineering, Luminescence

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Proceedings Article | 1 February 2019 Paper

Dynamic optical laser fabrication for engineering of quantum photonic devices

Martin Booth, Patrick Salter

Proceedings Volume 10926, 109261Y (2019) https://doi.org/10.1117/12.2509144

KEYWORDS: Waveguides, Laser optics, Crystals, Diamond, Pulsed laser operation, Laser crystals, Photonic devices, Aberration correction, Photonic crystals, Glasses

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Proceedings Article | 14 March 2018 Presentation

Laser written fluorescence in plastic slides for microscope calibration (Conference Presentation)

Patrick Salter, Martin Booth, Tony Wilson, Alex Corbett

Proceedings Volume 10499, 104991H (2018) https://doi.org/10.1117/12.2291474

KEYWORDS: Microscopes, Calibration, Microscopy, Luminescence, Laser processing, Sensors, Reflectivity, Optical filters, Ultrafast lasers, Point spread functions

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Proceedings Article | 14 March 2018 Presentation

High resolution study on laser fabrication inside diamond (Conference Presentation)

Patrick Salter, Martin Booth, Arnaud Courvoisier, David Moran, Donald MacLaren

Proceedings Volume 10522, 105221C (2018) https://doi.org/10.1117/12.2291476

KEYWORDS: Diamond, Transmission electron microscopy, Micromachining, Multiphoton lithography, Manufacturing, Laser applications, Femtosecond phenomena, Adaptive optics, Aberration correction, Nonlinear optics

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Proceedings Article | 14 March 2018 Presentation

Femtosecond laser inscribed color centers, microfluidics, and photonics in single-crystal diamond (Conference Presentation)

Shane Eaton, Vibhav Bharadwaj, Belen Sotillo, Argyro Giakoumaki, Thien Le Phu, Maria Ramos, Ottavia Jedrkiewicz, Roberto Osellame, Toney Fernandez, J.P Hadden, Andrea Chiappini, Maurizio Ferrari, Roberta Ramponi, Paul Barclay, Patrick Salter

Proceedings Volume 10536, 105361S (2018) https://doi.org/10.1117/12.2286274

KEYWORDS: Waveguides, Diamond, Femtosecond phenomena, Photonics, Quantum computing, Color centers, Microfluidics, Femtosecond laser micromachining, Nitrogen, Coherence (optics)

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Proceedings Article | 14 March 2018 Presentation

Parallelized SSTF-overlapping foci in space and time (Conference Presentation)

Patrick Salter, Bangshan Sun, Clemens Roider, Alexander Jesacher, Johannes Strauß, Johannes Heberle, Michael Schmidt, Martin Booth

Proceedings Volume 10549, 105490O (2018) https://doi.org/10.1117/12.2291482

KEYWORDS: Holography, Ultrafast phenomena, Laser processing, Holograms, Pulsed laser operation, Glasses, Nanofabrication, Structured light, Optical tweezers

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Proceedings Article | 21 April 2017 Presentation

Multi-functional laser fabrication of diamond (Conference Presentation)

Patrick Salter, Martin Booth

Proceedings Volume 10094, 100940S (2017) https://doi.org/10.1117/12.2252545

KEYWORDS: Modulation, Optical tracking, Diamond, Ultrafast lasers, Waveguides, Pulsed laser operation, Laser energy, Refractive index, Carbon, Sensors

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Proceedings Article | 13 October 2016 Paper

Fabrication of micro- and nanometre-scale polymer structures in liquid crystal devices for next generation photonics applications

Chloe Tartan, Patrick Salter, Martin Booth, Stephen Morris, Steve Elston

Proceedings Volume 9940, 99401B (2016) https://doi.org/10.1117/12.2237787

KEYWORDS: Liquid crystals, Polymers, Adaptive optics, Photonics, LCDs, Optical alignment, Glasses, Fabrication, Polymerization, Holography

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Direct Laser Writing (DLW) by two-photon photopolymerization (TPP) enables the fabrication of micron-scale polymeric structures in soft matter systems. The technique has implications in a broad range of optics and photonics; in particular fast-switching liquid crystal (LC) modes for the development of next generation display technologies. In this paper, we report two different methodologies using our TPP-based fabrication technique. Two explicit examples are provided of voltage-dependent LC director profiles that are inherently unstable, but which appear to be promising candidates for fast-switching photonics applications. In the first instance, ~1 μm-thick periodic walls of polymer network are written into a planar aligned (parallel rubbed) nematic pi-cell device containing a nematic LC-monomer mixture. The structures are fabricated when the device is electrically driven into a fast-switching nematic LC state and aberrations induced by the device substrates are corrected for by virtue of the adaptive optics elements included within the DLW setup. Optical polarizing microscopy images taken post-fabrication reveal that polymer walls oriented perpendicular to the rubbing direction promote the stability of the so-called optically compensated bend mode upon removal of the externally applied field. In the second case, polymer walls are written in a nematic LC-optically adhesive glue mixture. A polymer- LCs-polymer-slices or ‘POLICRYPS’ template is formed by immersing the device in acetone post-fabrication to remove any remaining non-crosslinked material. Injecting the resultant series of polymer microchannels (~1 μm-thick) with a short-pitch, chiral nematic LC mixture leads to the spontaneous alignment of a fast-switching chiral nematic mode, where the helical axis lies parallel to the glass substrates. Optimal contrast between the bright and dark states of the uniform lying helix alignment is achieved when the structures are spaced at the order of the device thickness, which was also found to be the case for the achiral system. The high resolution DLW technique limits structures to the focal spot size of the beam, ~1 μm in diameter, such that the transmittance is expected to be significantly enhanced relative to other stabilization techniques. Moreover, both devices remain stable under electrical and thermal cycling.

Proceedings Article | 15 March 2016 Presentation + Paper

Pulse front adaptive optics in multiphoton microscopy

B. Sun, P. Salter, M. Booth

Proceedings Volume 9717, 97170B (2016) https://doi.org/10.1117/12.2212642

KEYWORDS: Adaptive optics, Multiphoton microscopy, Ultrafast phenomena, Deformable mirrors, Microscopes, Wavefronts, Liquid crystals, Distortion, Objectives, Pulsed laser operation, Spatial light modulators, Control systems

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Proceedings Article | 9 March 2016 Paper

Pulse front control with adaptive optics

B. Sun, P. Salter, M. Booth

Proceedings Volume 9740, 97400Y (2016) https://doi.org/10.1117/12.2212615

KEYWORDS: Ultrafast phenomena, Adaptive optics, Deformable mirrors, Adaptive control, Multiphoton processes, Multiphoton microscopy, Optical components, Liquid crystals, Spatial resolution, Aberration correction, Spatial light modulators, Pulsed laser operation, Distortion, Beam shaping

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Proceedings Article | 4 March 2016 Paper

Directionality in laser fabrication of 3D graphitic microwires in diamond

B. Sun, P. Salter, M. Booth

Proceedings Volume 9736, 973612 (2016) https://doi.org/10.1117/12.2212686

KEYWORDS: Diamond, Adaptive optics, Laser processing, Multiphoton lithography, Carbon, Aberration correction, Polarization, Crystals, Spatial light modulators, Microscopes, Laser crystals, Pulmonary function tests

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Proceedings Article | 9 March 2015 Paper

Adaptive optics for the laser fabrication of 3D graphitic microwires in diamond

P. Salter, B. Sun, M. Booth

Proceedings Volume 9355, 935514 (2015) https://doi.org/10.1117/12.2086493

KEYWORDS: Diamond, Adaptive optics, Resistance, Spatial light modulators, Pulsed laser operation, Crystals, Aberration correction, Laser optics, Wavefronts, Femtosecond phenomena

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Proceedings Article | 7 March 2014 Paper

Ultrafast laser processing of diamond

P. Salter, M. Booth

Proceedings Volume 8974, 89740T (2014) https://doi.org/10.1117/12.2040384

KEYWORDS: Diamond, Pulsed laser operation, Carbon, Adaptive optics, Photonics, Electrodes, Resistance, Image transmission, Ultrafast lasers, Crystals

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Proceedings Article | 6 March 2014 Paper

Structural analysis of direct laser written waveguides

P. Salter, A. Jesacher, L. Huang, X. Liu, M. Baum, I. Alexeev, M. Schmidt, M. Booth

Proceedings Volume 8968, 896803 (2014) https://doi.org/10.1117/12.2040422

KEYWORDS: Waveguides, Refractive index, Microscopy, Spatial light modulators, Interferometry, Monochromatic aberrations, Silica, Objectives, Microscopes, Structural analysis

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Proceedings Article | 15 March 2013 Paper

Adaptive control of pulse front tilt, the quill effect, and directional ultrafast laser writing

P. Salter, R. Simmonds, M. Booth

Proceedings Volume 8611, 861111 (2013) https://doi.org/10.1117/12.2005082

KEYWORDS: Spatial light modulators, Pulmonary function tests, Adaptive control, Ultrafast lasers, Objectives, Polarizers, Ultrafast phenomena, Silica, Modulation, Pulsed laser operation

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Proceedings Article | 5 March 2013 Paper

Dynamic optical methods for direct laser written waveguides

P. Salter, M. Booth

Proceedings Volume 8613, 86130A (2013) https://doi.org/10.1117/12.2005054

KEYWORDS: Waveguides, Spatial light modulators, Holograms, Refractive index, Plasma, Adaptive optics, Aberration correction, Objectives, Monochromatic aberrations, Glasses

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Proceedings Article | 15 February 2012 Paper

Active and adaptive optical methods for rapid fabrication of 3D photonic structures

Patrick Salter, Richard Simmonds, Martin Booth

Proceedings Volume 8249, 82490M (2012) https://doi.org/10.1117/12.909836

KEYWORDS: Spatial light modulators, Adaptive optics, Refractive index, Diamond, Waveguides, Monochromatic aberrations, Aberration correction, Objectives, Microlens array, Beam shaping

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Showing 5 of 30 publications

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