Switchable thermal antenna by phase transition

Abstract

We introduce a thermal antenna which can be actively switched by phase transition. The source makes use of periodically patterned vanadium dioxide, a metal-insulator phase transition material which supports a surface phonon-polariton (SPP) in the infrared range in its crystalline phase. Using electrodes properly registred with respect to the pattern, the phase transition of VO2 can be localy triggered within few microseconds and the SPP can be diffracted making the thermal emission highly directionnal. This switchable antenna could find broad applications in the domain of active thermal coatings or in those of infrared spectroscopy and sensing.

References in corpus (3)

• Near-field thermal transistor
• Phase-change radiative thermal diode
• Infrared spectroscopy and nano-imaging of the insulator-to-metal transition in vanadium dioxide

Cited by in corpus (4)

• Wavelength-Tunable Infrared Metamaterial by Tailoring Magnetic Resonance Condition with VO2 Phase Transition
• Infrared Frequency-Tunable Coherent Thermal Sources
• Thermomechanical bistability of phase-transition oscillators driven by near-field heat exchange
• Smart windows passively driven by greenhouse effect