Light emitting GaN Quantum Well Metasurfaces
Abstract
Short Work Statement: -Design, Growth, and Fabrication Theme (E.1.): Achieving High Efficiency Metasurface-Mediated Emission~Task E.1.1 (mos. 1-12): Increase metasurface-mediated emission with 2D symmetric structures~Task E.1.2 (mos. 13-30): Design, Fabricate, and Demonstrate Electroluminescent Metasurfaces~Task E.1.3 (mos. 19-36): Design and Fabricate ~2nd Generation~ Metasurface Emitters Measurement Theme (E.2): Momentum-Resolved Spectroscopy Across the Entire 4~ Solid Angle~Task E.2.1 (mos. 1-12): Momentum-Resolved Spectroscopy of Air-Side Emission~Task E.2.2 (mos. 6-18): Determine Metasurface Quantum Efficiencies (MQE) With Total Light Collection~Task E.2.3 (mos. 19-36): Extend Angular and Spectral Range of Momentum-Resolved MeasurementsTheory Theme (E.3): Achieving Accurate Metasurface Simulations by Accounting for Incoherence~Task E.3.1 (mos. 1-18): Develop Experiment-Validated Metasurface PL Simulations~Task E.3.2 (mos. 19-36). Establish 2nd Generation Metasurface Design Heuristics and Create Bright S-polarized Emission LobesMaterials Theme (E.4): Increasing Metasurface Efficiency via Quantum-Mechanical Materials Engineering~Task E.4.1 (mos. 1-18): Definitively Quantify IQE Enhancements~Task E.4.2 (mos. 19-36): Engineer the LDOS Through Quantum-Mechanical Selection RulesAbstract:The central objective of the proposed research is to develop the fundamentalunderstanding and technical expertise needed to produce efficient light-emitting metasurfaces with novel functionality. Although phased-array metasurfaces have revolutionized our ability to design and produce passive optical elements, it is currently an open question whether phased array light-emitting metasurfaces are indeed possible to construct. The unifying outcome of thisproposal is demonstrations of novel GaN-based luminescent metasurfaces where light is efficiently emitted into modes with imprinted metasurface functionality such as directionality or focusing.Research efforts are divided into four themes addressing challenges specific to 1) design, growth, and fabrication; 2) measurement; 3) theory; and 4) materials properties and engineering.In theme 1 investigations we will design and fabricate new photoluminescent and electroluminescent metasurfaces that significantly improve the efficiency with which light couples to desired metasurface-mediated emission channels. We will demonstrate luminescent metasurfaces with highly directional emission as well as luminescent metasurface lenses where light is directly emitted into focused beams. Metasurface measurements primarily exploit the PI~s unique homebuilt momentum-resolved spectrometer system, which quantitatively maps light emission as a function of the direction of emission. We will expand the spectral and angular range of our measurement capabilities, account for all the light emitted by luminescent metasurfaces, and quantify metasurface directivity as well as internal and external quantum efficiencies. Accurately simulating luminescent metasurfaces is challenging due to the lack of intrinsic phase coherence. We will pursue two approaches for developing experiment-validatednumerical simulations of metasurface photoluminescence. We will use combined experimenttheory feedback to establish intuition and heuristics for luminescent metasurface design. In materials-focused efforts we will definitively quantify how nanofabrication impacts internal quantum efficiencies and exploit quantum engineering of dipole orientations in UV quantum wells to achieve even greater control over metasurface-mediated light emission. The proposed research program will provide new classes of optical materials and deviceswith demonstrable applications of relevance to Navy and DOD objectives. Most generally, this program addresses the Navy~s desire to ~understand, design, and develop optical metamaterials to control light propagation~. These investigations will have the most direct relevance to LED technologies, providing pathways to light e
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Nov 09, 2018
- Source ID
- N000141912004
Entities
People
- Jon A Schuller
Organizations
- Office of Naval Research
- United States Navy
- University of California, Santa Barbara