Thin Film Interference in Diamond Membranes for Control of Silicon Vacancy Center Emission
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2025-10-23 |
| Journal | Advanced Optical Materials |
| Authors | Deniz Acil, Hengming Li, Maiken H. Mikkelsen |
| Institutions | Duke University |
Abstract
Section titled āAbstractāAbstract Thināfilm interference is widely leveraged in classical optics as a minimalistic yet powerful lever for controlling optical fields, underpinning technologies from antiāreflective coatings to photovoltaics. However, extending this concept to diamond membranes and other thin film solidāstate quantum emitter host materials has remained unexplored, partly due to the challenges in fabricating ultrathin membranes. Here, a wedgeāshaped diamond membrane is engineered to demonstrate thicknessādependent interference phenomena. This can not only be used as a broadband reflector or wavelengthāspecific absorber, but it can also significantly modulate both excitation and emission intensities of silicon vacancy (SiV) centers, leading to a photoluminescence enhancement up to 96āfold. This route circumvents the need for highāQ cavities or intricate nanolithography, and the sample gradient offers a visualization of broadband resonances and antiāresonances across the visible to nearāinfrared spectrum. These findings offer an alternative method for controlling effective brightness enhancement or suppression of diamond color centersābased quantum photonics. Beyond quantum emission enhancement, diamond membranes could serve as a passive layer such as a broadband reflector or a wavelengthāspecific absorber, and find applications in heterostructures, photovoltaics, display technologies, and even in semiconductor thermal management.