The HyAngle project explores the physics, potential, and limitations of polariton-mediated dispersion management by developing and studying three basic devices. Each of these is associated with a work package:
WP 1: non-dispersive optical filters,
WP 2: [confidential]
WP 3: efficient polariton LEDs with narrowband and angle-independent spectra.
Based on the insights obtained during the above activity, the project pursues two specific applications where the above devices enable major advances in capability. Each of these applications is associated with a further work package:
WP 4: hyperspectral imaging with high numerical aperture optics and
WP 5: lensless imaging of hyperspectral and fluorescent signals.
In addition, an underpinning workpackage (WP #0) is dedicated to gathering and organizing information relevant to the project as a whole, in particular information on specific material properties, processing methodology and device characteristics.
While progress in the first reporting period has been delayed due to larger than expected challenges with recruitment of suitable team members, some activity has taken place on all workpages, with the exception of WP #4 (which is only scheduled to start in M31). Activities on all workpackages are ongoing. Specifically, following a literature research on suitable organic materials, a range of materials has been characterized in further detail (in particular via ellipsometry), and their properties are now being catalogued (WP #0). A series of filters has been developed, fabricated and tested (WP #1, Nature Communications 10.1038/s41467-024-54623-1). Planning has taken place to identify this materials and designs required for the devices made in WP #2. Relatively extensive work on WP #3, including optical modelling and fabrication and characterization of a series of test devices has led to the demonstration of a new record in the performance of polariton LEDs as well as to a series of polariton LEDs and lasers (ACS Photonics acsphotonics.3c01610; MRS Communications 10.1557/s43579-024-00543-6). Given the promising results in WP #1, initial work is underway on WP #5, even though the original start of this WP was only planned for M31.
The main achievement during the first reporting period is the improvement in polariton LED efficiency. A publication on this work is currently under external peer review.
