Hot-Electrons Generation in New Plasmonic Materials for Integrated On-Chip Devices
Abstract
In this project, in collaboration with ETH, Zurich, a record-breaking, ultra-compact, low-loss plasmonic modulator with 72Gbps speed and a power consumption of 12 fJ/bit was demonstrated (year 1 ). In year 2, we demonstrated hybrid plasmonic waveguides utilizing ultrathin TiN films that outperform gold waveguides in terms of mode compactness and propagation length. We also performed systematic studies of TiN, ZrN, ZnO, TiO films and nanoparticles that laid the foundation for the subsequent work. A comprehensive review of plasmonics for energy harvesting was carried out, and efficient water-splitting application assisted by gap plasmons was demonstrated. In year 3, we explored plasmonics for color generation and demonstrated plasmonic color printing with semicontinuous metal films. We showed that TiN@Ti02 core-shell nanoparticles act as plasmon-enhanced photosensitizers. In addition to metals and semi metals, we investigated metal oxides and showed extraordinarily large permittivity and reflectance modulation in ZnO films and nanostructures. With broadband pump-probe spectroscopy, we measured the hot-carrier relaxation time in plasmonic TiN and ZrN films. In a collaborative effort, an advanced technique for the hot-carrier distribution mapping in plasmonic structures was invented. In the area of metasurfaces, we employed machine-learning-assisted computational methods to optimize the performance of high efficiency thermal emitters. Another collaborative effort lead to the demonstration of high temperature- tolerant nanofurnaces with refractory TiN for heterogeneous catalysis. We also investigated the plasmonic properties of strongly correlated materials such as strontium niobite. A high-temperature sensor utilizing refractory plasmonic materials was shown as well.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 25, 2020
- Accession Number
- AD1108190
Entities
People
- Alexandra Boltassea
Organizations
- Purdue University