Applied optics for metasurfaces [AO]
● Research fields
Fiber Optics,
Micro-nano optics,
Microscopy imaging,
Biophotonics.
● Research details
Metasurface, an ultrathin and planar nanostructure with flexible control of the amplitude, phase, and polarization of light, has been demonstrated to excellent properties in imaging applications. This project includes the following two sub-researchs.
Sub-research 1: Fiber based endoscopy based on metasurfaces [AO1]
Fiber based endoscopy imaging has offered numerous opportunities for obtaining information from remote, hard-to-reach place in medical imaging. Such endoscopy is usually composed of complex structures and thus quite bulky. Metasurfaces with subwavelength structures, designed to change the amplitude, polarization, and phase of incident beam, provide the potential to overcome these obstacles and thus enhance the performance of endoscopy imaging.
This project combines the emerging metasurface technology with existing endoscopy imaging technology to achieve a high-quality observation of biological samples in medical imaging can be realized in a large field of view, which is expected to be applied to microscopy and the early diagnosis of cancer.
Example of Nano-optic endoscope design and fabrication
[1] Nano-optic endoscope for high-resolution optical coherence tomography in vivo, Nature Photonics (2018).
[2] A broadband achromatic metalens array for integral imaging in the visible, Light Sci. Appl. 8, 67 (2019).
Sub-research 2: Multicolor imaging based on metasurfaces [AO2]
Human Brain mapping is international cutting-edge science problem. As a key imaging technology of Human Brain mapping, multicolor imaging greatly enhances the investigation ability of the relationship between localization and interaction of sub-cellular structures. Thus, it is beneficial for researchers to go deep into understanding of complicated biological phenomena and processes in neural cells of brain. However, multicolor super-resolution imaging is challenging task since the use of the traditional dye filter results in the difficulties in color separation ability, spectrum cross-talk and data collection efficiency.
The starting point for this project is designing broader spectrum filter using metasurfaces and then combines metasurfaces with single-molecule localization imaging technology to achieve multicolor super-resolution imaging. Such approach is expected to enhance color separation ability, spectrum cross-talk and data collection efficiency of optical system and further can be applied to the finer human brain mapping.
● Required background
Advanced Optics, Fourier optics, Applied optics, Information optics, Spectroscopy, Biophysics, Introduction to Biophotonics, Programming skill (Matlab, C and so on).
● Research suitability
PhD, MPhil, Undergraduate [Position AO1 and AO2]
● Contact supervisor
AO1: Professor Jian-Wen Dong (博导) dongjwen.at.SYSU
AO2: Associate Professor Rui Chen (硕导) chenr229.at.SYSU