Optical switching of coherent VO{sub 2} precipitates embedded in sapphire
Conference
·
OSTI ID:196498
In this work, we report the formation of a new type of active or {open_quotes}smart{close_quote} surface that is produced by ion implantation and thermal processing. By co-implanting vanadium and oxygen into a single- crystal sapphire substrate and annealing the system under appropriate conditions, it was possible to form buried precipitates of vanadium dioxide that were crystallographically oriented with respect to the host Al{sub 2}O{sub 3} lattice. The implanted VO{sub 2} precipitate system undergoes a structural phase transition that is accompanied by large variations in the optical transmission which are comparable to those observed for thin films of VO{sub 2} deposited on sapphire. Co-implantation with oxygen was found to be necessary to ensure good optical switching behavior.
- Research Organization:
- Oak Ridge National Lab., TN (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 196498
- Report Number(s):
- CONF-951155--36; ON: DE96005666
- Country of Publication:
- United States
- Language:
- English
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