A5101858685- Plasmonic and Surface Plasmon Research
- Metamaterials and Metasurfaces Applications
- Advanced Antenna and Metasurface Technologies
- Nonlinear Optical Materials Studies
- Orbital Angular Momentum in Optics
- Gold and Silver Nanoparticles Synthesis and Applications
- Optical Wireless Communication Technologies
- Optical Coatings and Gratings
- Phase-change materials and chalcogenides
- Image Processing Techniques and Applications
- Laser Material Processing Techniques
- Photoacoustic and Ultrasonic Imaging
- Chalcogenide Semiconductor Thin Films
- Nanofabrication and Lithography Techniques
- Advanced MEMS and NEMS Technologies
- Antenna Design and Analysis
- Advanced Optical Sensing Technologies
- Photonic and Optical Devices
- Photonic Crystals and Applications
- Liquid Crystal Research Advancements
- Advanced optical system design
National Taiwan University
2011-2018
Research Center for Applied Science, Academia Sinica
2013
Metasurface-based components are known to be one of the promising candidates for developing flat optical systems. However, their low working efficiency highly limits use such feasible applications. Although introduction metallic mirror has been demonstrated successfully enhance efficiency, it is still somehow limited imaging and sensing applications because they only available devices operating in a reflection fashion. Here, we demonstrate three individual GaN-based metalenses transmission...
Measuring the polarization state of light and determining optical properties chiral materials are inherently complex issues because requirement consequential measurements between different orthogonal states polarization. Here, we introduce an on-chip polarimetry based on visible metasurfaces for addressing issue analysis with compact components. We demonstrate integrated metasurface chips can effectively determine a set Stokes parameters covering broad wave-band at light. For proof concept,...
Abstract Integrated‐resonant units (IRUs), incorporated with multiple resonators into one building block or resonator modes, show a great capacity for achieving controllable smooth and linear phase dispersion as well amplitude manipulation over continuous broad bandwidth. Based on an IRU library designed in the wavelength range of 400 to 667 nm, three achromatic deflectors showing constant steering angles 9.5°, 19°, 28°, respectively, are numerically validated. Achromatic metalenses various...
Femtosecond laser pulses are focused on a thin film of Ge2Sb2Te5 phase-change material, and the transfer illuminated material to nearby substrate is investigated. The size, shape, phase-state fabricated pattern can be effectively controlled by fluence thickness film. Results show multi-level electrical optical reflection states patterns, which may provide simple efficient foundation for patterning future devices.
Using femtosecond laser-induced forward transfer techniques we have fabricated gold dots and nanoparticles on glass substrates, as well nanobumps thin film. The surface morphologies of these structures with different laser fluences film thicknesses are investigated. We also study the focusing defocusing properties nanofence-an arranged nanobump pattern-by total-internal reflection microscope. Observations reveal that plasmon waves can be highly directed focused via this nanofence pattern....
In article number 1800031, Din Ping Tsai and co-workers incorporated integrated-resonant units (IRUs) into metasurfaces to demonstrate achromatic beam deflectors, metalenses, highly efficient versatile polarization convertors operated in the continuous visible-light range. IRUs are considered as one building block consisting of multiple resonant elements or resonator supporting modes. Such integrated configurations show a great capacity for achieving controllable smooth linear phase...
Here we demonstrated a GaN metalens array to project light spots which can be shape generator in the structure applications. The advantages of this metadevice is weight, small, ultrathin, durable and easy compact with other device. spot size function distance detector. A arranged by single diameter 20 μm projected whose 2.22 um average at 150 cm far away and. Our design provides new avenue for application such as sensing 3D environmental construction.
Gold nanobumps on the surface of a gold thin film would scatter plasmon wave to forward and backward scattering light. Both dot array chains are built demonstrate light-manipulating properties. While fan-shaped light from individual nanobump is observed, three-dimensional (3-D) focusing diverging properties found quarter circle structure composed nanobumps. Nanobumps with their heights 16nm can deflect waves produce 3-D at 3.6 micron above film. Experiment results clearly that different...
We demonstrate the surface plasmonic wave on Au thin film can be scattered and manipulated by structured nanobumps. Experimental results show gold nanobumps deflect waves to scattering out focusing.
Nanobump structures are fabricated on the gold thin film by femtosecond laser direct writing (fs-LDW) technique. The height and diameter of nanobump about 30nm, 400 nm, respectively. scattering light surface plasmon wave radiated from a is observed using total internal reflection microscopy. A quarter-circle structure composed nanobumps designed produced to manipulate into specific pattern: focusing diverging quarter circular in three dimensional space demonstrated. polarization properties...
In contrast to the traditional bulk optical elements, metasurfaces provide a new perspective on flexibly shaping electromagnetic field by manipulating its phase, amplitude as well polarization at will via compact and easy-of-fabrication system. However, due high phase dispersion of their building blocks, significantly suffer from large chromatic aberration. Such aberration degrades performance full-color applications, such in communication, detection, imaging, displaying etc. Here we propose...
The beauty of metasurfaces lies on their capability for controlling the amplitude, phase, and polarization response with subwavelength resolution via spatially-varying nano-scatterers. With incorporation multiple elements or resonances nano-resonators into metasurfaces, these integrated-resonant units (IRUs) provide additional degree freedom to manipulate multispectral optical property scattering light over a continuous broad bandwidth, which is especially essential eliminating chromatic...
Metalenses have great ability in light focusing and can be tailored to exhibit varied functionalities for ultrathin optical applications. Here, we demonstrate a GaN metalens array which regarded as shaping generator the structured generation. The consists of 60 x metalenses project 42 cm spots area at distance 1.5 M. estimated by identifying deformation spot distribution. advantages this metadevice is weight, small, ultrathin, durable easy compact with other devices. Our design provides new...
Metalens significantly suffers from chromatic aberration issue, which limits its applications on color images. Here we demonstrate the first broadband achromatic metalens in visible wavelength based concept of integrated-resonant unit elements (IRUEs).