PHD Student Qianni ZHANG won the Best Paper Award (second runner-up) at the 21st IEEE Photonics Society – Hong Kong Chapter Postgraduate Conference

Qianni ZHANG, PhD student of Prof. Andrew POON, awarded the Best Paper Award (second runner-up) at the 21st IEEE Photonics Society – Hong Kong Chapter Postgraduate Conference for the paper "Photon-pair sources in Si3N4 microresonators using spontaneous four-wave mixing".


Quantum light sources are the keystone component in various emerging quantum technologies, including quantum computing, communications, metrology and sensing.  Photon pairs, generated from nonlinear parametric processes under room temperature, are considered as a promising and versatile quantum source working as inherently correlated signal/idler photon-pairs and heralded single photons.


In this paper, the group experimentally demonstrate the photon-pair generation in single-waveguide coupled, micrometer-sized silicon nitride microring resonators using spontaneous four-wave mixing (SFWM) process. Si3N4 is a promising material platform to realize quantum photonic circuits with a higher third-order optical nonlinearity than silica and a lower propagation loss than silicon at the telecommunication wavelength band.  Moreover, integrated Si3N4 photonic circuits are highly scalable and compatible with the mature complementary-metal-oxide-semiconductor (CMOS) technologies. In the dispersion-engineered Si3N4 microring resonators, the group obtain a decent photon-pair generation rate with a low input power leveraging the field enhancement effect in microresonators. This on-chip photon-pair source is a building block that can be easily cascaded with other quantum photonic components to investigate entanglement generation and quantum information processing for the emerging quantum technologies. 

 

 

Figure 1 - The schematic illustrations of the device and working principle

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21st IEEE Photonics Society – Hong Kong Chapter Postgraduate Conference

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