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Ultrathin Silicon Structures Tune Mid-IR Light in Billionths of a Second
Key Takeaways
- EPFL researchers led by Hatice Altug built mid-IR metasurfaces on suspended membranes of crystalline silicon.
- Tuning is achieved by inducing mobile electrical charges in the silicon, changing optical response in real time without altering the nanostructure.
- The team demonstrated two tuning approaches, one using integrated electrodes as microheaters.
- Switching speeds reach billionths of a second, compared with millisecond-scale tuning in earlier approaches.
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DT Editorial Team··via phys.org