365 citations · 1.1k across the 14 of their papers we have counts for
16 papers
Wavelength-Dependent Photoluminescence Mapping of Depth-Dependent Degradation Under Thermal Stress in Phenethylammonium Tetrafluoroborate Treated Perovskite Solar Cells
Julisa Juarez, Akash Dasgupta, Alan Zhan +2
Studying real-time degradation in perovskite semiconductors remains an important challenge. Conventional methods often cannot separate interfacial and bulk processes or rely on des…
Beating bandwidth limits for large aperture broadband nano-optics
Johannes E. Fröch, Praneeth K. Chakravarthula, Jipeng Sun +10
Flat optics have been proposed as an attractive approach for the implementation of new imaging and sensing modalities to replace and augment refractive optics. However, chromatic a…
Real Time Full-Color Imaging in a Meta-Optical Fiber Endoscope
Johannes E. Froech, Luocheng Huang, Quentin A. A. Tanguy +6
Endoscopes are an important component for the development of minimally invasive surgeries. Their size is one of the most critical aspects, because smaller and less rigid endoscopes…
Fast Extended Depth of Focus Meta-Optics for Varifocal Functionality
James E. M. Whitehead, Alan Zhan, Shane Colburn +2
Extended depth of focus (EDOF) optics can enable lower complexity optical imaging systems when compared to active focusing solutions. With existing EDOF optics, however, it is diff…
Design and Optimization of Ellipsoid Scatterer-based Metasurfaces via the Inverse T-Matrix Method
Maksym V. Zhelyeznyakov, Alan Zhan, Arka Majumdar
Large-area metasurfaces composed of discrete wavelength-scale scatterers present an extremely large number of degrees of freedom to engineer an optical element. These degrees of fr…
Inverse design of optical elements based on arrays of dielectric spheres
Alan Zhan, Taylor K. Fryett, Shane Colburn +1
Arrays of wavelength scale scatterers are a promising platform for designing optical elements with a compact footprint. The large number of degrees of freedom in this system allows…