Yihan Jin

Yihan graduated with a Bachelors degree in Optoelectronics from the Beijing Institute of Technology in 2019. She conducted research related to new surface-modification strategies suitable for PbS Colloidal Quantum Dot inks at the University of Alberta, Canada, in 2018. She has also been involved in building a 4.5x zoom optical system and designing an optical fiber imaging system. Her graduation project was on the use of Gaussian system and zoom optical systems for the development of an optical system that could achieve a large field of view and identify six-magnitude stars with a high accuracy. Previously, she has published papers on quantum dots and optical system design. Yihan joined the Soft Matter Photonics group in October 2019 and is supervised by Dr. Stephen Morris and Prof. Steve Elston. Her project is related to manipulating new generation thin film technology in optical system and communication. In her first year, she has already published three papers on this project. Outside of the lab, Yihan enjoys fencing and Chinese folk dance. She is also a graduate student at Lady Margaret Hall, Oxford.

• Photonics
• Optical material
• Liquid crystal
• VR/AR
• Optical design

• Enhancing laser speckle reduction by using the thin-film device: The artefact known as speckle can plague numerous imaging applications where the narrow linewidth of laser light is required, which includes laser projection, near-head-display (VR/AR) and medical imaging. Here, we use thin-film chiral nematic liquid crystal (LC) mixture with devices that can be used to mitigate the influence of speckle when subjected to an applied electric field.
• Ultrafast full-range optical phase modulation and beam positioning: Optical phase modulation is important in many aspects of optical and optoelectronic technology. Phase modulation can be obtained either by changing the refractive index (or effective refractive index) of a material through which light is propagating or by physically changing the optical path length of the light. For applications requiring a spatially structured phase modulation of a propagating optical wavefront, a liquid crystal (LC) spatial light modulator (SLM) is often desirable and is employed in applications such as micromanipulation and beam shaping. The device is designed to allow substantial optical phase modulation on a millisecond timescale at room temperature. The next step is to manipulate this technique in light positioning.

1. David J. Hansford, Yihan Jin, Steve J. Elston, and Stephen M. Morris, “Enhancing laser speckle reduction by decreasing the pitch of a chiral nematic liquid crystal diffuser”, Sci Rep, 2021.
2. Yihan Jin, David J. Hansford, Steve J. Elston and Stephen M. Morris , “Laser Speckle Reduction using a Liquid Crystal Diffuser Enhanced with Redox Dopants”, Advanced Photonics Research, 2020.
3. Yihan Jin, Steve J. Elston, Julian A.J. Fells, Martin J. Booth, Chris Welch, Georg H. Mehl, and Stephen M. Morris, "Millisecond Optical Phase Modulation Using Multipass Configurations with Liquid-Crystal Devices", Phys. Rev. Applied 14, 2020.
4. Lingju Meng, Tao Zeng, Yihan Jin, Qiwei Xu, and Xihua Wang, "Surface-Modified Substrates for Quantum Dot Inks in Printed Electronics", ACS Omega 4, 2019.
5. Kaiyuan Fan, Jun Chang, Lingjie Wang, Guangwei Shi, Hongbo Wu, and Yihan Jin "Design of fiber bundle imaging system", Proc. SPIE 10846, Optical Sensing and maging Technologies and Applications, 2018.
6. Benlan Shen, Jun Chang, Chuhan Wu, Yihan Jin, Weilin Chen, Dalin Song & Yu Mu. "Local zoom system for agricultural pest detection and recognition", Appl. Phys. B 124, 219, 2018.