A5043063787- Plasmonic and Surface Plasmon Research
- Gold and Silver Nanoparticles Synthesis and Applications
- Photonic and Optical Devices
- Nonlinear Optical Materials Studies
- 2D Materials and Applications
- Graphene research and applications
- Photonic Crystals and Applications
- Strong Light-Matter Interactions
- Advanced Fiber Laser Technologies
- Mechanical and Optical Resonators
- Metamaterials and Metasurfaces Applications
- MXene and MAX Phase Materials
- Optical Coatings and Gratings
- Quantum Mechanics and Non-Hermitian Physics
- Perovskite Materials and Applications
- Diamond and Carbon-based Materials Research
- Quantum and electron transport phenomena
- Nonlinear Photonic Systems
National Tsing Hua University
2011-2021
Research Center for Applied Science, Academia Sinica
2020-2021
The University of Texas at Austin
2019-2021
A nanolaser is a key component for on-chip optical communications and computing systems. Here, we report on the low-threshold, continuous-wave operation of subdiffraction based surface plasmon amplification by stimulated emission radiation. The plasmonic nanocavity formed between an atomically smooth epitaxial silver film single optically pumped nanorod consisting gallium nitride shell indium core acting as gain medium. atomic smoothness metallic crucial reducing modal volume losses. Bimodal...
We report on the first demonstration of broadband tunable, single-mode plasmonic nanolasers (spasers) emitting in full visible spectrum. These are based a single metal-oxide-semiconductor nanostructure platform comprising InGaN/GaN semiconductor nanorods supported an Al2O3-capped epitaxial Ag film. In particular, all-color lasing subdiffraction resonators is achieved via novel mechanism property weak size dependence inherent spasers. Moreover, we have successfully reduced continuous-wave...
The development of ultrasmooth, macroscopic-sized silver (Ag) crystals exhibiting reduced losses is critical to fully characterize the ultimate performance Ag as a plasmonic material, and enable cascaded integrated devices. Here we demonstrate growth single-crystal plates with millimetre lateral sizes for linear nonlinear applications. Using these crystals, surface plasmon polariton propagation lengths beyond 100 μm in red wavelength region are measured. These exceed predicted values using...
The properties of van der Waals (vdW) heterostructures are drastically altered by a tunable moir\'e superlattice arising from periodic variations atomic alignment between the layers. Exciton diffusion represents an important channel energy transport in semiconducting transition metal dichalcogenides (TMDs). While early studies performed on TMD heterobilayers have suggested that carriers and excitons exhibit long lengths, rich variety scenarios can exist. In crystal with large supercell size...
Plasmonic metasurfaces consist of two-dimensional arrays metallic nanoresonators (plasmonic "meta-atoms"), which exhibit collective and tunable resonance properties controlled by electromagnetic near-field coupling. These man-made surfaces can produce a range unique optical unattainable with natural materials. In this review, we focus on the emerging applications precisely engineered plasmonic for nonlinear optics surface-enhanced Raman spectroscopy (SERS). practice, these are quite...
Realization of smaller and faster coherent light sources is critically important for the emerging applications in nanophotonics information technology. Semiconductor lasers are arguably most suitable candidate such purposes. However, minimum size conventional semiconductor utilizing dielectric optical cavities sustaining laser oscillation ultimately governed by diffraction limit (∼(λ/2n)(3) three-dimensional (3D) cavities, where λ free-space wavelength n refractive index). Here, we...
Excitons, bound electron–hole pairs in a 2D plane, dominate the optical properties of monolayer transition metal dichalcogenides (TMDs). A large exciton binding energy on order 0.5 eV was theoretically predicted and experimentally determined recently. These ultrastable excitons thus open an avenue to explore physics such as Bose–Einstein condensation superfluidity at room temperature (Kasprzak et al 2006 Nature 443 409; Plumhof 2014 Nat. Mater. 13 247; Fogler Commun. 5 4555; Jiang John Sci....
Non-Hermitian photonic systems with gains and/or losses have recently emerged as a powerful approach for topology-protected optical transport and novel device applications. To date, most of these employ coupled diffraction-limited dielectric waveguides or microcavities, which exchange energy spatially temporally. Here, we introduce diffraction-unlimited using plasmon–exciton coupling (polariton) system tunable plasmonic resonance (energy line width) strength. By designing chirped silver...
We report on the first demonstration of metal–insulator–semiconductor-type plasmonic lasers at telecom wavelength (∼1.3 μm) using top-down fabricated semiconductor waveguides single-crystalline metallic platforms formed epitaxially grown Ag films. The critical role film thickness in sustaining lasing is investigated systematically. Low-threshold (0.2 MW/cm2) and continuous-wave operation cryogenic temperatures can be achieved a 150 nm platform with minimum radiation leakage into substrate....
We present a strong coupling system realized by the localized surface plasmon mode in individual silver nanogrooves and propagating modes launched periodic nanogroove arrays with varied periodicities on continuous medium. When are resonance mode, we observe √N scaling of Rabi splitting energy, where N is number coupled to mode. Here, confirm giant order 450–660 meV (N = 2) visible spectral range, corresponding strength 160–235 meV. In some cases studied us, about 10% reaching ultrastrong regime.
Single crystalline Ag films on dielectric substrates have received tremendous attention recently due to their technological potentials as low loss plasmonic materials. Two different growth approaches been used produce single previously. One approach is based repetitive cycles of a two-step process (low temperature deposition followed by RT annealing) using molecular beam epitaxy (MBE), which extremely time-consuming the need for repeat cycles. Another rapid e-beam capable growing thick (>300...
We report on an efficient room-temperature source of single photons based nitrogen-vacancy centers in nanodiamonds (NDs) placing a large-area plasmonic platform formed by crystalline gold flakes covered with thin dielectric layer. Due to the strongly confined fields layer, NDs show large enhancement fluorescence intensity without significant degradation photon purity. According deduced lifetime from g(2) measurements, Purcell factor is estimated be ~1.4. The very ideal for needs...