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Quantum and noninear optics of a cold-atom ring laser with controlled dispersion

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  • Full or part time
    Dr J Goldwin
  • Application Deadline
    Applications accepted all year round
  • Competition Funded PhD Project (Students Worldwide)
    Competition Funded PhD Project (Students Worldwide)

Project Description

When a pulse of light propagates through a medium it becomes distorted, and may appear to slow down, speed up, or even reverse direction. Although the principle of causality is not violated, these effects have ramifications for lasers whose gain media have exotic refractive properties. Such lasers have been proposed for frontier applications in timekeeping, electromagnetic and gravitational field sensing, and inertial navigation. Despite the potentially disruptive nature of these technologies, experimental demonstrations are still few and debate surrounds some aspects of the theory.

We are building a ring laser using a gas of cold atoms as a gain medium, tuning the group index through controlled quantum coherences. In the regime of slow light propagation, such a laser shows reduced sensitivity to environmental perturbations, making it attractive for active time/frequency standards. In the so-called superluminal regime, the lasing wavelength is hypersensitive to rotations via the Sagnac effect, making it promising for next generation gyro navigation systems. However the noise properties of such lasers are not well understood and only preliminary measurements have been made. We will help fill gaps in our understanding of lasing in fast and slow light media, and lay the foundation for future technologies based on their application.

For more information about the Cold Atoms group and the Midland Ultracold Atoms Research Centre:

To find out more about studying for a PhD at the University of Birmingham, including full details of the research undertaken in the School, the funding opportunities available for your subject, and guidance on making your application, you can order a copy of our Doctoral Research Prospectus:

Funding Notes

This research project is in competition for funding with one or more projects at this institution. Usually the project which receives the best applicant will be awarded the funding. The funding is only available to UK citizens or those who have been resident in the UK for a period of 3 years or more.

Non-UK Students: If you have the correct qualifications and access to your own funding, either from your home country or your own finances, your application to work on this project will be considered.

For advice on making your application, please contact:
[Email Address Removed]

How good is research at University of Birmingham in Physics?

FTE Category A staff submitted: 39.00

Research output data provided by the Research Excellence Framework (REF)

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