Harnessing Imperfections: Haoye Qin's Vision for Topological Nanophotonics

Transforming Disorder into Opportunity

At the nanoscale, imperfections in materials often lead to challenges in manipulating light with precision. However, Haoye Qin, a nanophotonics researcher now at Tsinghua Shenzhen International Graduate School, believes that deliberate disorder can serve as a valuable asset. His work focuses on leveraging topological features and tailored optical designs to enable new functionalities in light management and manipulation.

Building a Research Legacy

Having recently joined Tsinghua as an assistant professor, Qin is optimistic about expanding his research group while delving into complex problems in topological nanophotonics. The recognition of his contributions through the Nanophotonics Early Career Award underscores the relevance of his work and the impact it holds for future developments in optical technologies. Qin described the award as a pivotal moment in his career, allowing him to pursue ambitious projects that have real-world applications beyond the lab setting.

Basic Tenets of Qin's Research

Qin's research merges topology, singular optics, and advanced nanostructures to exert control over various light properties, including polarization, intensity, and momentum. One of his primary goals is to create compact optical devices capable of achieving complex tasks while maintaining feasibility for manufacturing.

He believes the intersection of topology and photonics holds the key to achieving multifunctional devices that are easier to fabricate and deploy in practical contexts. This involves minimizing the challenges currently posed by complex optical setups and precise alignment requirements.

Insights on Topological Features

Topology examines properties that remain invariant despite small deformations, analogous to twists in a rope that remain significant even when the rope is stretched. Applied to optics, these topological characteristics emerge near singular points where certain optical properties converge. Qin’s approach utilizes these singularities to create structured light that maintains organized behavior, offering enhanced control over polarization and directionality, which is vital for practical applications.

The Role of Designed Disorder

While traditional views suggest that disorder can impede performance, Qin posits that intentional designs that incorporate variations in nanoscale elements can enhance optical capabilities. By manipulating the orientation of these elements, his team successfully encoded complex functionalities—such as vortex beams—while preserving topological advantages. This innovative thought transforms disorder from a liability into an additional layer of design flexibility.

Advancing Polarization Control

One of Qin's noteworthy contributions involves the manipulation of polarization states using twisted photonic structures. Specifically, by rotating two layers relative to each other, he has broadened the spectrum of polarization states accessible from a single compact device. This control extends beyond linear polarization, allowing for elliptical and circular configurations that could streamline the design of polarization-sensitive instruments.

Exceptionally Pointed Physics

Qin’s exploration into exceptional points—conditions where two optical modes fully merge and exhibit a unique topology—further highlights the potential of his research. He discovered that, by creatively employing anisotropy within metasurfaces, it is possible to achieve a multitude of polarization outputs. This sets the stage for more versatile optical devices that can cater to a range of applications from sensing to optical multiplexing, all within a simplified single-layer structure.

Harnessing Optical Forces

Understanding optical forces typically hinges on light intensity gradients. However, Qin's findings suggest that the presence of bound states can also create unique interactive forces through the geometry of light fields. By altering structural symmetries, he aims to enable functionalities like nanoparticle manipulation and fluidic management, potentially paving the way for applications in biomedical and industrial technologies that require compact setups.

The Future of Structured Light and Intelligent Sensing

Qin is particularly focused on the production of structured light and intelligent sensing systems. By merging various information dimensions of light—such as phase, polarization, and angular momentum—within a single platform, he envisions a future where complex functionalities can coexist and enhance sensing capabilities. This approach not only promises compact devices but also aspires to minimize the reliance on external systems for processing data.

Challenges Ahead

Despite the promising directions of Qin's work, several hurdles remain. Key challenges include addressing material losses, device scalability, and practical performance under realistic conditions. For Qin, the goal is to create topological nanophotonic devices that excel in robustness, efficiency, and manufacturability, ultimately fostering a new generation of technologies that integrate structured light generation and optical information processing.

His long-term vision goes beyond current laboratory achievements, aspiring to a future where complex optical tasks can be executed within single, compact devices. This could revolutionize how we interact with and utilize light in various fields, from communications to healthcare.

The Nanophotonics Early Career Award supports young scientists by recognising the outstanding work of four individuals who have completed their PhD within the last five years and who have contributed significantly to progress in the field of nanophotonics or nano-optics. Winners were announced during the Nano Summit 2026 in Berlin.