About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
|
| Presentation Title |
Engineered Silicon-based Nanocomposites for Optical Filtering |
| Author(s) |
Mari-Therese S. Burton, David M. Lunking, Ofure E. Osunbor, Jiuk Byun, Alexander S. Hyla, Michael J. Sailor, Aaron J. Henson |
| On-Site Speaker (Planned) |
Mari-Therese S. Burton |
| Abstract Scope |
Etched porous silicon presents a unique method for creating engineered nanostructures directly on-chip using common cleanroom and wet chemistry processes. Here, two etching techniques are used to synthesize a porous silicon scaffold into which metal particles can be deposited to increase scattering and absorption. Metal assisted chemical etching uses a metal- patterned surface to catalyze the oxidation and local dissolution of silicon. Etch bath chemistry can be altered to introduce nanoscale porosity along the surface of the larger pores underneath the metal pattern. Anodic etching with sinusoidally varying current density creates layers of different porosity and pore size to produce a chirped grating, creating a broad spectral stop-band. The desired porosity and pore size based on computational modeling are created by controlling etch parameters to create tunable bandpass filters that could be used for photovoltaic cell temperature control and passive IR sensors. |