66 citations · 191 across the 12 of their papers we have counts for
12 papers
Entanglement demonstration on board a nano-satellite
Aitor Villar, Alexander Lohrmann, Xueliang Bai +14
Global quantum networks for secure communication can be realised using large fleets of satellites distributing entangled photon-pairs between ground-based nodes. Because the cost o…
SpooQySats: cubesats to demonstrate quantum key distribution technologies
James A. Grieve, Robert Bedington, Rakhitha C. M. R. B. Chandrasekara +1
Satellite-based QKD offers the potential to share highly secure encryption keys between optical ground stations all over the planet. SpooQySats is a programme for establishing the…
Demonstrating Miniaturised, entangled photon-pair sources on board nano satellites to enable future QKD missions
Rakhitha C. M. R. B. Chandrasekara, Robert Bedington, Xueliang Bai +7
We report on our progress developing highly-miniaturised, polarisation-entangled, photon pair sources for CubeSats. We have a correlated photon-pair source in orbit in the NUS Gala…
Tracking capacitance of liquid crystal devices to improve polarization rotation accuracy
Rakhitha Chandrasekara, Kadir Durak, Alexander Ling
We report a capacitance tracking method for achieving arbitrary polarization rotation from nematic liquid crystals. By locking to the unique capacitance associated with the molecul…
Generation and analysis of correlated pairs of photons on board a nanosatellite
Zhongkan Tang, Rakhitha Chandrasekara, Yue Chuan Tan +5
Satellites carrying sources of entangled photons could establish a global quantum network, enabling private encryption keys between any two points on Earth. Despite numerous propos…
The photon pair source that survived a rocket explosion
Zhongkan Tang, Rakhitha Chandrasekara, Yue Chuan Tan +3
We report on the performance of a compact photon pair source that was recovered intact from a failed space launch. The source had been embedded in a nanosatellite and was designed…
Correcting for accidental correlations in saturated avalanche photodiodes
James A. Grieve, Rakhitha Chandrasekara, Zhongkan Tang +2
In this paper we present a general method for estimating rates of accidental coincidence between a pair of single photon detectors operated within their saturation regimes. By fold…
Deploying quantum light sources on nanosatellites I: lessons and perspectives on the optical system
Rakhitha Chandrasekara, Tang Zhongkan, Tan Yue Chuan +5
The Small Photon Entangling Quantum System is an integrated instrument where the pump, photon pair source and detectors are combined within a single optical tray and electronics pa…
Space qualified nanosatellite electronics platform for photon pair experiments
Cliff Cheng, Rakhitha Chandrasekara, Yue Chuan Tan +1
We report the design and implementation of a complete electronics platform for conducting a quantum optics experiment that will be operated on board a 1U CubeSat (a 10 x 10 x 10 cm…
Radiation tolerance of opto-electronic components proposed for space-based quantum key distribution
Tan Yue Chuan, Rakhitha Chandrasekara, Cliff Cheng +1
Plasma in low earth orbit can damage electronic components and potentially jeopardise the scientific missions in space. Predicting the accumulated damage and understanding the comp…
Near-space flight of a correlated photon system
Tang Zhongkan, Rakhitha Chandrasekara, Yau Yong Sean +3
We report the successful test flight of a device for generating and monitoring correlated photon pairs under near-space conditions up to 35.5km altitude. Data from ground based qua…
Silicon avalanche photodiode operation and lifetime analysis for small satellites
Yue Chuan Tan, Rakhitha Chandrasekara, Cliff Cheng +1
Silicon avalanche photodiodes (APDs) are sensitive to operating temperature fluctuations and are also susceptible to radiation flux expected in satellite-based quantum experiments.…