Quantum Emitters and Detectors

At OSON we actively work on future quantum technologies with a focus on two key components: emitters and sensors of quantum light. We design, fabricate, and optimize these devices for custom applications and integrate them into photonic platforms. Beyond fundamental research, we are laying the groundwork for commercial applications of our emitters and detectors in quantum computing, quantum communication, and quantum metrology.

Quantum Light Emitters
Our team develops unique perovskite-based single-photon sources. Compared to other quantum light-emitting platforms, perovskite emitters can be easily scaled, enabling advanced multiphoton quantum technologies. Perovskite quantum dots are extremely small (~10 nm) and, as a result, the quantum confinement effect leads to efficient single-photon emission. Our team has invented the chemical approach to synthesize a family of perovskite quantum dots that can be tuned over a wide spectral range by simply changing the composition. As a result, our emitters combine high brightness, spectral tunability, and room temperature operation. For practical quantum applications, we are currently merging perovskite emitters with optical cavities and metamaterials to enhance their brightness and integrate them into existing photonic platforms.

Quantum Light Detectors
Our team develops advanced superconducting nanowire single-photon detectors (SNSPDs). SNSPD is the leading photon-counting technology, and detectors fabricated in our group compete successfully with the best commercial devices.

The small energy gap and fast electron dynamics of superconducting materials make them a unique platform for ultra-sensitive and fast single-photon detection. Our team manages the entire workflow, from the film deposition to the design, fabrication, and characterization of SNSPD devices. Our current focus is on scaling up this unique technology to develop multiple arrays and exploring novel designs and multiplexing schemes. We are also interested in understanding the microscopic mechanism of SNSPD operation and investigating new high-Tc superconducting materials like MgB₂ , which hold the potential to advance quantum detector technology.

OSON Lab

We are a spectroscopy group in the School of Physical and Mathematical Sciences of Nanyang Technological University.
As part of the Division of Physics and Applied Physics, we contribute to a vibrant scientific community advancing the synthesis and characterization of molecular and nanoscale materials. We have also strong ties with the School of Electrical and Electronic Engineering, where we focus on fabrication and modeling of nanoscale devices.