Interview: "The innovation lies in our novel designs of optical waveguides"

In this interview, postdoc researcher Roman Zakoldaev explains his innovative work on photonic solutions for real-time environmental monitoring and biosensing, highlighting their significance in cryospheric science and potential applications in medical diagnostics.

Can you briefly describe your research in the Physics and Technology Department and its significance to iC3?

I'm a postdoctoral researcher in the Physics and Technology Department, where I focus on sensing and spectroscopy of molecules on a chip. My work involves designing new photonic solutions to explore their potential for environmental monitoring and biosensing. Molecules provide unique spectroscopic signatures, which we can collect and analyze to gain critical insights, aligning directly with iC3's research goals.

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How do these photonic solutions work, and what makes them innovative?

The innovation lies in our novel designs of optical waveguides. These waveguides allow light to propagate and interact with analyte molecules. By doing so, we can achieve real-time environmental monitoring without the need for traditional sample collection and processing in distant laboratories. This approach not only saves time but also increases the accuracy and immediacy of the data we collect.

How do your photonic solutions contribute to cryospheric science?

Our photonic solutions are particularly useful in monitoring gases like methane and CO2, which are significant in studying climate change and the cryosphere. By providing real-time data on these gases, we can better understand their roles and impacts in cryospheric environments. For example, recently, we managed to detect stable isotope ration on a chip with 1x1 cm!

What challenges do you face in your research, and how do you overcome them?

One of the main challenges is ensuring that our waveguides are sensitive enough to detect the small concentrations of molecules we are interested in. To address this, we continuously refine our designs and use advanced simulation techniques before fabrication. Additionally, we explore innovative material nanostructuring methods to enhance sensitivity, ensuring our waveguides achieve the required precision for environmental and biomedical applications.

Can you share some insights into your previous work and how it led to your current research?

I completed my PhD in Saint Petersburg, Russia, where I focused on developing laser technologies. This work naturally led to my current research in on-chip sensing, as it is one of the applications of laser technologies. My experience in international collaborations, including projects with European and Chinese teams, has also been invaluable. These collaborations have broadened my perspective and allowed me to bring diverse approaches to my current work.

Outside of your scientific work, what activities do you enjoy?

I have a variety of interests outside of work that help me maintain a balanced life. I enjoy cross-country skiing and hiking, which allow me to explore and appreciate the stunning landscapes around me. These activities not only keep me physically active but also provide a mental break from my research. Cooking is another passion of mine, especially experimenting with dishes involving meat and fish. I love trying out new recipes and techniques, which parallels the innovative approach I take in my scientific endeavors. Additionally, I occasionally indulge in ice bathing, a refreshing activity that involves jumping into cold waters. It's invigorating and a great way to clear the mind. I also enjoy traveling in a camper, which allows me to discover new places and cultures, enriching my personal experiences and perspectives.

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Looking ahead, what are your future goals in your research?

I aim to further refine photonics solutions and expand their applications beyond environmental monitoring into biosensing for disease diagnostics. I am particularly interested in exploring their potential in medical diagnostics, where real-time monitoring of biomolecules could revolutionize early disease detection and treatment strategies. Additionally, I hope to collaborate with more international teams to enhance the scope and impact of our research.

“How beautiful
The Earth is,
And the people upon it.”

(c) Sergei Esenin

Roman Zakoldaev works with the iT1 group developing novel technologies within the iC3 Polar Research Hub. The group’s work includes developing new modular clean hot water drilling technology, innovative remote data capture systems, new imaging technologies, novel nutrient & carbon sensors, and multi-scale modelling of ice-ocean biogeochemical interactions. To find out more about Roman Zakoldaev’s research, please check out his list of publications, or contact him by email or on LinkedIn.