Well below the phase transition temperature, Larsen says the bandgap location sensitivity was 1nm/°C and 3nm/°C in the visible and infrared region respectivey. Closer to the transition temperature, the transmission characteristics change rapidly. Larsen and colleagues saw the guided mode color change from green to yellow to an off-state and finally to blue over a 17°C temperature interval. (Credit: Thomas Tanggaard Larsen) |
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