Thermal Signature Control Using Microphonotic Materials
Abstract
Research Problem: The proposed work aims to advance the state-of-the-art in tunable thermal signature design using microstructured materials. We will introduce innovations in optical design and material integration that provide a route to strong control over the amplitude, angular, and spectral response of thermal emission of synthetic materials across the 3-15 μm range. In particular, we will develop design strategies for magnifying the effect of electrical tuning on emissive properties, using systems based on coupled optical resonators and integrated III-V semiconductor materials. Particular material functionalities to be designed include tunable broadband emissivity and tunable angular beaming. Anticipated Outcome: The results of the research will be reported in a series of papers that (1) Formulate new design principles for electrical control of emission, including amplitude, angular response, and spectral features; (2) Introduce new methods for simulation, design, characterization, and data analysis for devices based on these principles; and (3) Develop new methodologies for incorporating III-V growth and device fabrication techniques to achieve strong electrical control of emission. The net outcome will be an advance in the state-of-the-art in thermal signature control within a relatively mature materials technology platform. Impact on NGA’s Capabilities: NGA’s capability to produce timely, relevant, and accurate GEOINT critically depends on the interpretation of infrared signatures. The emergence of a new class of synthetic, microstructured materials with custom-designed infrared emission signatures poses a major threat to the accuracy of interpretation methods such as thermometry and hyperspectral imaging. Understanding, predicting, and harnessing the development of engineered materials, particularly those with tunable signatures, is thus of critical importance to the NGA mission. The proposed work will provide perspective on the capabilities and readiness level of microstructured materials for thermal signature control. Given significant recent investments in this area by adversarial nations, it will benefit the NGA to (1) understand the potential, short-, and long-term feasibility of this class of materials and devices and their potential effects on accurate signature interpretation, as well as to (2) have access to the novel capabilities they provide. The proposed work will help map the short- and longer-term trajectory for thermal signature management. Research Team: The PI and co-PI form a complementary team with expertise in the design of microstructured materials with tailored optical properties and fabrication of tunable III-V semiconductor devices. The team has a strong record of extramural funding, scientific publication, and established relationships with potential transition partners.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Sep 29, 2020
- Source ID
- HM04762010004
Entities
People
- Michelle Povinelli
Organizations
- National Geospatial-Intelligence Agency
- University of Southern California