A5065542609- Plasmonic and Surface Plasmon Research
- Thermal Radiation and Cooling Technologies
- Optical Coatings and Gratings
- Chalcogenide Semiconductor Thin Films
- Gold and Silver Nanoparticles Synthesis and Applications
- Nanowire Synthesis and Applications
- ZnO doping and properties
- Quantum Dots Synthesis And Properties
- GaN-based semiconductor devices and materials
- Semiconductor Quantum Structures and Devices
- Photonic Crystals and Applications
- Metamaterials and Metasurfaces Applications
- solar cell performance optimization
- Acoustic Wave Resonator Technologies
- Thin-Film Transistor Technologies
- Optical Wireless Communication Technologies
Universidad Politécnica de Madrid
2019-2023
The development of new nanophotonic devices requires the understanding and modulation propagating surface plasmon phonon modes arising in plasmonic polar dielectric materials, respectively. Here we explore CdZnO alloy as a material, with tunable plasma frequency reduced losses compared to pure CdO. By means attenuated total reflectance, experimentally observe hybridization polariton (SPP) (SPhP) air-CdZnO-sapphire three-layer system. We show how through precise control thickness, resonance...
Abstract Metal-oxides hold promise as superior plasmonic materials in the mid-infrared compared to metals, although their integration over established material technologies still remains challenging. We demonstrate localized surface plasmons self-assembled, hemispherical CdZnO metal-oxide nanoparticles on GaAs, a route enhance absorption photodetectors. In this system, two plasmon modes are identified at 5.3 and 2.7 μm, which yield an enhancement of light intensity underlying GaAs. case...
A method based on infrared reflectance spectroscopy is presented by which the Mg content in ZnO/(Zn,Mg)O multiple quantum wells with very thin barriers can be determined. The relies observation of interface phonon-polaritons appear as sharp dips p-polarized spectra at oblique incidence near longitudinal optical (LO)-phonon frequencies both QW and barrier materials. By fitting to a dielectric function model, LO phonon frequency (Zn,Mg)O layers depends content. Comparing calibration via...
Transparent Conductive Oxides (TCOs) have been described as a promising alternative to metals for IR plasmonics. However, low propagation of surface plasmons is major shortcoming limiting the potential these materials in waveguiding-related applications. As proof concept, we propose using polar plasmonic substrates method overcome this issue. In study, demonstrate existence hybrid phonon-plasmon waves an air-CdZnO-sapphire system and characterize their properties, including improved distance...
We show here that Cd(Zn)O can be deposited on GaAs by MOCVD forming nanoparticles with a hemispherical shape. These maintain the key characteristics from CdO film: very high plasma frequency and low losses, hence retaining strong plasmonic character. As result of this, when illuminated infrared light, two localized surface plasmon (LSP) modes are excited at 2.7 5.3 microns, electric field is heavily amplified in underlying substrate. Moreover, their geometry allows them to partially change...
Metal-oxides are known to be ideal alternatives noble metals for mid-IR plasmonics, but they typically grown on substrates as sapphire or glass, which cannot used active materials in electronic devices. We demonstrate here that thin Cd(Zn)O films can integrated GaAs, one of the dominant optoelectronic material platforms mid-IR. is likely best plasmonic this region spectrum, and we show when deposited GaAs it yields polycrystalline support surface plasmon polaritons (SPPs). As a result...
In this work we propose the use of self-assembled CdZnO nanoparticles as a route to improve power absorption in midinfrared GaAs-based quantum well infrared photodetectors (QWIPs). We experimentally demonstrate low temperature growth on GaAs and characterize their plasmonic response mid-IR. Computational analysis resonances coupled intersubband transitions wells show that at normal incidence, forbidden by selection rules, can be obtained. Gains high 5.5 are also reported.
The integration of nanostructures on top solar cells has been previously demonstrated as an effective method to increase the collection efficiency by coupling sunlight. In this work, approach is implemented using core-shell gallium nanoparticles (Ga-NPs) functional light scatterers III-V cells, investigating how Ga-NPs affect their photovoltaic performance. effect studied in GaAs and GaAsSbN superlattice-based with different bandgaps for a wide range sizes. After NP size optimization,...
With this work we seek to cover a key space in the study of new materials for IR plasmonics: their integration on functional substrates. We show that Cd(Zn)O, promising semiconductor oxide characterized by its low losses, can be grown polycrystalline form GaAs substrate. Despite polycrystallinity, plasmonic response described based physics homogeneous thin layer. study, validate Cd(Zn)O future integrated systems GaAsbased photonic devices.
Metal-oxides are known to be ideal alternatives noble metals for mid-IR plasmonics, but they typically grown on substrates as sapphire or glass, which cannot used active materials in electronic devices. We demonstrate here that thin Cd(Zn)O films can integrated GaAs, one of the dominant optoelectronic material platforms mid-IR. is likely best plasmonic this region spectrum, and we show when deposited GaAs it yields polycrystalline support surface plasmon polaritons (SPPs). As a result...