Projects and Attachments
As part of the four year physics honours degree at NUS, students spend two semesters on a research project. In the CQT Quantum Optics group we can host several honours students, depending on the availability of space and time. Our projects combine optical and quantum physics with a number of experimental techniques (e.g. basic electronics, basic optical design, simple data acquisition programming). Feel free to contact us - we don't always specify explicit projects because it depends on what comes up in the lab and the student's experience. Come by for an informal chat to discuss what the projects are about or discuss variations, or check out some of our past projects.
For the coming semester (AY20/21), we had some ideas for projects that would be well aligned with current research efforts:
- A new source of narrowband photon pairs for quantum clock
This project explores a scheme to generate narrowband photon pairs suitable for long-distance transmission over a telecommunication network. Narrowband photons are required as they minimize the broadening effect of dispersion, allowing the time correlation within photons in the pair to be preserved as much as possible, and is useful for synchronizing remote clocks. These photon pairs can then be entangled so that they can be used to detect tampering of the transmission channel, forming the basis of a quantum-secure clock synchronization protocol with potentially sub-picosecond precision.
- Cryogenic quantum electronics for single-photon detectors
Superconducting nanowire detectors (SNSPD) are single-photon detectors that have high detection efficiencies (>90%) and low jitter (10s of picoseconds). The operation temperature of SNSPDs is typically <4K. To take advantage of the cryogenic ambient temperature where electronics usually have better noise characteristics, we invest the performance of commercial amplifiers and custom-electronic filters at these temperatures and aim to achieve better timing resolution for the SNSPDs. This approach potentially improves the precision and speed for applications e.g., quantum LIDAR and quantum-communication.
- Synthetic aperture imaging in the optical domain
The angular resolution of optical imaging depends strongly on the size of the aperture of an instrument. Increasing the aperture while maintaining coherence can be very expensive, therefore it is advantageous to explore a large synthetic aperture of small instruments, a technique well-established in the radiofrequency domain using amplitude interference. To avoid the challenge maintaining coherence in the optical domain, this project explores intensity interference instead.
- Environmental sensing in existing fiber networks
Optical fiber networks form the backbone of modern communication, and are deployed widely in metropolitan areas as well as over very long distances. Apart from communication applications, these networks can be explored as large sensors for environmental variables like seismological activity. In this project, these measurement techniques are explored.
Do contact us, either via email or through one of our team members!
UROPS and SPS Projects
These are optional one semester projects for undergraduates that can be used to offset some of the coursework modular credits. These projects are simpler and tend to be confined to a small aspect of a larger research project. Some times they develop into Honours projects - or more...
Past examples include:
- Wavefront engineering for manipulating light-atom interactions (UROPS project, 2017)
- Interaction of Sonoluminescing Microbubbles with Microparticles (SPS project 2015)
- Saturation of a Photodiode at High Intensity (UROPS project, 2015)
- Measurement of the Number of Atom in a Magneto-Optical Trap Using Absorption Imaging (UROPS project, 2012)
- Quantum hacking.
- Simple optical autocorrelator.
- Single photon spectrometer.
We occasionally host people that do not fit into any of the other categories. This can include for example people doing e.g. Diploma work, internships, or people who are bonded to work in Singapore because they received some scholarship (A-Star scholars for example).