Dr Alison Yao

Senior Lecturer

Physics

Personal statement

I am a member of the Computational Nonlinear and Quantum Optics (CNQO) group within the Optics division of the Department of Physics. I received my BSc (Hons) from Heriot-Watt University and my PhD from University of Strathclyde. I have been a lecturer in the Department of Physics since 2013. 

Publications

Multiple self-organized phases and spatial solitons in cold atoms mediated by optical feedback
Baio Giuseppe, Robb Gordon R M, Yao Alison M, Oppo Gian-Luca, Ackemann Thorsten
Physical Review Letters Vol 126 (2021)
https://doi.org/10.1103/PhysRevLett.126.203201
Free electron laser generation of X-ray Poincaré beams
Morgan Jenny, Hemsing Erik, McNeil Brian W J, Yao Alison
New Journal of Physics Vol 22 (2020)
https://doi.org/10.1088/1367-2630/ab984f
Degradation of light carrying orbital angular momentum by ballistic scattering
Viola Shaun, Chen Zhaozhong, Yao Alison M, Valyrakis Manousos, Kelly Anthony E, McKee David, Lavery Martin P J
Physical Review Research Vol 2 (2020)
Optomechanical transport of cold atoms induced by structured light
Baio Giuseppe, Robb Gordon R M, Yao Alison M, Oppo Gian-Luca
Physical Review Research Vol 2 (2020)
https://doi.org/10.1103/PhysRevResearch.2.023126
Scattering of light with angular momentum from an array of particles
McArthur Duncan, Yao Alison M, Papoff Francesco
Physical Review Research Vol 2 (2020)
https://doi.org/10.1103/PhysRevResearch.2.013100
Control of spatially rotating structures in diffractive Kerr cavities
Yao Alison M, Gibson Christopher J, Oppo Gian-Luca
Optics Express Vol 27, pp. 31273-31289 (2019)
https://doi.org/10.1364/OE.27.031273

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Teaching

I am the 1st year Adviser of Studies for Physics.

I currently teach 1st year mechanics and electromagnetism in PH183: Mechanics & Waves and PH184: Electromagnetism & Quantum Physics, and optical angular momentum as part of PH562 Adv. Topics in Quantum Optics.

Research interests

My research is based upon the generation and applications of structured light, in particular light carrying orbital angular momentum (OAM). It ranges from understanding the fundamental properties of this light to investigating its behaviour in various nonlinear systems, including demonstrating for the first time the mechanism behind optical rogue waves, to potential applications in quantum communication, ocean optics, nonlinear beam propagation and interaction with chiral molecules. 

Professional activities

5th International Conference on Optical Angular Momentum (ICOAM19), Ottawa , June 2019
Invited speaker
17/6/2019
SPIE Photonics West 2018: OPTO
Invited speaker
1/2/2018
6th International Conference on Photonics, Optics and Laser Technology
Member of programme committee
25/1/2018
4th International Conference on Optical Angular Momentum (ICOAM17)
Invited speaker
18/9/2017
International Conference on Quantum, Atomic, Molecular and Plasma Physics (QuAMP)
Organiser
4/9/2017
“Quantum Field Framework for Structured Light Interactions”, Banff International Research Station for Mathematical Innovation and Discovery (BIRS)
Contributor
23/4/2017

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Projects

Doctoral Training Partnership 2018-19 University of Strathclyde | Henderson, Grant
Yao, Alison (Principal Investigator) Oppo, Gian-Luca (Co-investigator) Henderson, Grant (Research Co-investigator)
01-Jan-2019 - 01-Jan-2023
Doctoral Training Partnership (DTP 2016-2017 University of Strathclyde) | Hill, Lewis
Oppo, Gian-Luca (Principal Investigator) Yao, Alison (Co-investigator) Hill, Lewis (Research Co-investigator)
01-Jan-2017 - 06-Jan-2021
Control and Applications of Structured Light and Chiral Molecules
Yao, Alison (Principal Investigator)
01-Jan-2017 - 31-Jan-2021
Collective effects and optomechanics in ultra-cold matter (ColOpt) (H2020 MCSA ETN)
Ackemann, Thorsten (Principal Investigator) Griffin, Paul (Co-investigator) Oppo, Gian-Luca (Co-investigator) Robb, Gordon (Co-investigator) Yao, Alison (Co-investigator)
01-Jan-2017 - 31-Jan-2020
ORANGUTRAN - ORbital ANGUlar momentum TRANsmissometer with zero collection angle error
McKee, David (Principal Investigator) Griffin, Paul (Co-investigator) Yao, Alison (Co-investigator)
"Light passing through natural water systems experiences both absorption and scattering leading to important effects such as heating of the water, growth of plants through photosynthesis and generation of reflectance signals for remote sensing systems. One of the most common measures of the optical properties of a water body is the beam attenuation coefficient which is the sum of absorption and scattering. This is usually measured by recording the intensity of a beam of light after it has passed through a known length of water and comparing the signal with that obtained either in air or, more usually, in ultrapure water. It is usually assumed that any photons either absorbed or scattered do not make it to the detector and so the remaining signal is due entirely to directly transmitted photons. However, in reality, light is scattered in water in such a way that standard transmissometers accidentally collect a large and quite variable amount of forward scattered light. This means that the signal they generate has a large error that is actually a feature of the instrument design, and sensors with different optical layouts will provide substantially different values. It has long been thought that this was an inevitable feature of the measurement and most users simply ignore the problem. Indeed, current NASA measurement protocols for this parameter explicitly leave it to the end user of data to work out how to deal with this problem. This is an intolerable position for which we have recently found a new solution.

We are planning to build a new device to measure beam attenuation that exploits a recently developed understanding of a quantum property of photons called orbital angular momentum, OAM. We can control this quantum state of light and generate a beam of light with a defined OAM state. When such a beam of light experiences a scattering event, the OAM state changes by a defined, quantum amount that we can easily identify. We can use this change of quantum state to effectively label scattered photons and discriminate them from directly transmitted photons. This means we can measure the number of photons that make it across a volume of water without being absorbed or scattered, without being affected by the scattering collection error that causes problems for current instruments. Our device will then be significantly more accurate than what is currently available and will help researchers and other end-users make significantly better and consistent measurements of what is an extremely important optical property of natural water systems."
30-Jan-2016 - 29-Jan-2017
Doctoral Training Partnership (DTA - University of Strathclyde) | Gibson, Christopher
Yao, Alison (Principal Investigator) Oppo, Gian-Luca (Co-investigator) Gibson, Christopher (Research Co-investigator)
01-Jan-2014 - 23-Jan-2019

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