About the project
This project will focus on designing and testing terahertz (THz) light modulators and manipulators using microstructured materials combined with liquid crystals. It will explore how such systems can resonantly amplify THz field, causing the adjacent layer of liquid crystals to locally reorient thus changing the optical transmission and beam path.
Spectroscopy using the THz region of spectrum is expanding rapidly into a wide range of applications in sensing, wireless communication and imaging. However, the main challenge is to develop an efficient way to manipulate free-space THz beams given that the methods and materials used for other wavelengths are typically not suitable, namely have limited THz response. Recently, we demonstrated that thin liquid crystals are among the few materials that can be used as wave retarders for bright THz radiation.
This project will focus on designing and testing THz light modulators and beam steering systems that combine microstructured materials with an added tuneable element made of liquid crystals.
The experimental research will build upon our expertise in contactless THz switching. For example, we will explore how the resonant amplification of THz fields by metallic micro-structured materials can lead to the adjacent layer of liquid crystals to locally reorient, thus changing the beam transmission. While achieving practical devices is the ultimate goal, the proposed research will involve the investigation of some relevant, core fundamental aspects, such as non-linear interactions between THz and molecular or nano layers. Furthermore, as THz radiation provides a powerful tool for extracting properties of materials, optical and physical parameters of selected organic and inorganic layers will be determined using experimental work and the recently developed and dedicated machine learning methods [3]. This part will inform the choice of materials for the planned THz beam modulation and manipulation.
The School of Physics & Astronomy is committed to promoting equality, diversity inclusivity as demonstrated by our Athena SWAN award. We welcome all applicants regardless of their gender, ethnicity, disability, sexual orientation or age, and will give full consideration to applicants seeking flexible working patterns and those who have taken a career break. The University has a generous maternity policy, onsite childcare facilities, and offers a range of benefits to help ensure employees’ well-being and work-life balance. The University of Southampton is committed to sustainability and has been awarded the Platinum EcoAward.
