Broadband hyperbolic thermal metasurfaces based on the plasmonic phase-change material In₃SbTe₂

Abstract

Thermal radiation modulation facilitated by phase change materials (PCMs) necessitate a large thermal radiation contrast in broadband as well as a non-volatile phase transition, which are only partially satisfied by...

Fabrication and integration of photonic devices for phase-change memory and neuromorphic computing

“…Sb 2 Se 3 and Sb 2 S 3 can also be exploited for low loss photonic applications but at a cost of crystallization speed and cycling endurance [123,124]. More recent materials developments include TiTe 2 /Sb 2 Te 3 phase-change heterostructure [125][126][127][128], single-element material Sb [129][130][131][132] and Te [133][134][135], self-decomposed Ge-Sb-O alloys [136,137], and many potential PCMs obtained via computational screening [138,139] and bad metals, such as In 3 SbTe 2 , AgSnTe 2 , and AgSnSe 2 [140][141][142][143][144].…”

Infrared Resonance Tuning of Nanoslit Antennas with Phase-Change Materials

“…This material, In 3 SbTe 2 (IST), shows a significantly larger electrical conductivity in its crystalline phase compared to conventional PCMs such as Ge 3 Sb 2 Te 6 (GST) and is therefore classified as a “bad metal”. Only recently, metallic nanostructures of arbitrary shapes have been optically written and modified via direct laser writing, and functional emissivity shaping metasurfaces were demonstrated as well. − However, the resonance tuning of inverse antennas such as nanoslits and a distinct comparison with different PCMs have not been demonstrated yet.…”

Self-Adaptive Multistage Infrared Radiative Thermo-Optic Modulators Based on Phase-Change Materials

“…Specifically, as an example, optical fuses in the optical system can block an excessive quantity of heat transferring into the devices by modulating the transmittance, absorbance and reflectance of the film [3]. Given the above, researchers can exploit many advanced materials such as electrically induced phase-change materials [9][10][11], thermally induced phase-change materials [12][13][14][15][16][17][18][19][20][21][22], grapheme [2,[23][24][25][26], and liquid crystals [27][28][29] to achieve these performances. Phase-Change Materials (PCMs) are extensively used in thermo-optic regulation fields due to their phase transition properties.…”

“…On the other hand, Germanium telluride antimony (GST) and indium telluride antimony (IST) do not require external electric or thermal energy to maintain the desired radiative properties [31]. Therefore, they have more important significance in the fields of multispectral regulation, thermal camouflage, radiative cooling and so on [13][14][15][16]18,20,22]. When the temperature is above their phase transition temperature t s , GST/IST switches from an amorphous to crystalline state, accompanied by significant changes in the complex refractive index.…”