Photonic nanocomposite films made by pulsed laser deposition.
Abstract
Photonic nanocomposites are of particular interest for manipulating photons of different energies and arranging their interaction with the matter. Among existing methods of making photonic nanocomposites, concurrent multi-beam multi-target pulsed laser deposition (CMBMT PLD) has such advantages as nanometer vertical resolution and the ability of combining materials of quite different physical nature (insulators-electro-conductors, organic-inorganic, and others). The uniqueness of the method is in varying the concentration of the constituents in an otherwise unachievable broad range of fractional volumes along and across the deposited films. CMBMT PLD can be performed in vacuum, atmosphere of low-pressure gases, or in ambient air. The project will deal with the nanocomposites where the host (substance with prevailing fractional volume of greater than90percent) has photonic functionality and the nano-additives that enhance such functionality. We will evaluate our approaches on exemplary materials, such as nanocomposites made of photonic lead halide perovskite CsPbBr3 impregnated with nanoparticles (NPs) of high-entropy alloys (HEA) of plasmonic metals, such as noble and transitional metals. The goal of the proposed project will be to verify the hypothesis that bringing HEA NPs in the perovskite nanocomposites will significantly improve (more than three times) the intensity of their photoluminescence (PL) in broad optical spectrum due to surface plasmon polariton resonances in the vicinity of the NPs. The goal will be achieved through attaining the following objectives- (1) Obtaining constituent materials and PLD targets and their characterization; (2) Making nanocomposite films; (3) Characterization of the produced nanocomposite films; (4) Data analysis and conclusions on reaching the goal. The major anticipated result will be that the PL intensity of the proposed perovskite nanocomposites impregnated with HEA NPs will be more than three times greater than that of the perovskites without NPs. Other anticipated results are- (1) CMBMT PLD assisted synthesis of the lead halide perovskites will be investigated for the first time to our knowledge; and (2) HEA plasmonic films and NPs will be made for the first time using CMBMT PLD and their plasmonic properties will be investigated. The project will contribute to AFOSR research interests described in A.3. Physical Sciences (RTB1), Technical Area A.3.g. Physics of Sensing, BAA FA9550-23-S-0001, p. 42 Basic research objective- Creating new materials, systems, and techniques to approach the fundamental detection limits.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Mar 07, 2024
- Source ID
- FA95502310611
Entities
People
- Abdalla Darwish
Organizations
- Air Force Office of Scientific Research
- Dillard University
- United States Air Force