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Beckman Institute for Advanced Science and Technology

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Neil Krueger

Tunable Porous Silicon Hybrid Light-Emitting Microcavities 

Porous Silicon (PSi) was first discovered in the mid-1950s, but it was a room temperature display of visible luminescence decades later that drew widespread attention. Efforts at all-Silicon (Si) light-emitting devices with PSi ensued. But, despite progress, performance never justified widespread implementation. While interest in PSi for Si-based optoelectronics has subsided, PSi has gained a reputation as a versatile optical material, due largely to its ability to form high-quality optical superlattices through a time-varying current density during electrochemical formation. This enables high-quality factor microcavities that could be coupled with highly efficient emitters and provide a new platform to strongly manipulate emission for applications like lasers and quantum information processing. A hybrid structure composed of a well-defined, high-quality emitting cavity layer between PSi photonic crystal mirrors is particularly attractive to bridge the gap between Si photonics and optoelectronic devices. We have shown that such PSi-based hybrid photonic architectures can be achieved with a modified transfer-printing technique.

Giang-Chau Ngo

Mapping the Brain and T2*

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Urbana, IL 61801

217-244-1176

communications@beckman.illinois.edu

University of Illinois Urbana-Champaign

Beckman Institute for Advanced Science and Technology

405 N. Mathews Ave. M/C 251

Urbana, IL 61801

217-244-1176

communications@beckman.illinois.edu