Flexible nanomembrane photonic-crystal cavities for tensilely strained-germanium light emission
Abstract
Flexible photonic-crystal cavities in the form of Si-column arrays embedded in polymeric films are developed on Ge nanomembranes using direct membrane assembly. The resulting devices can sustain large biaxial tensile strain under mechanical stress, as a way to enhance the Ge radiative efficiency. Pronounced emission peaks associated with photonic-crystal cavity resonances are observed in photoluminescence measurements. These results show that ultrathin nanomembrane active layers can be effectively coupled to an optical cavity, while still preserving their mechanical flexibility. Thus, they are promising for the development of strain-enabled Ge lasers, and more generally uniquely flexible optoelectronic devices.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jun 13, 2016
- Source ID
- 10.1063/1.4954188
Entities
People
- Jian Yin
- Max G. Lagally
- Pornsatit Sookchoo
- Roberto Paiella
- Xiaorui Cui
- Xiaowei Wang
Organizations
- Air Force Office of Scientific Research
- Boston University
- Division of Electrical, Communications & Cyber Systems
- University of Wisconsin–Madison