Details

Autor(en) / Beteiligte

• Zhang, Yifei
• Fowler, Clayton
• Liang, Junhao
• Azhar, Bilal
• Shalaginov, Mikhail Y
• Deckoff-Jones, Skylar
• An, Sensong
• Chou, Jeffrey B
• Roberts, Christopher M
• Liberman, Vladimir
• Kang, Myungkoo
• Ríos, Carlos
• Richardson, Kathleen A
• Rivero-Baleine, Clara
• Gu, Tian
• Zhang, Hualiang
• Hu, Juejun

Titel

Electrically reconfigurable non-volatile metasurface using low-loss optical phase-change material

Ist Teil von

• Nature nanotechnology, 2021-06, Vol.16 (6), p.661-666

Ort / Verlag

England: Nature Publishing Group

Erscheinungsjahr

2021

Quelle

Springer Nature - Connect here FIRST to enable access

Beschreibungen/Notizen

• Active metasurfaces promise reconfigurable optics with drastically improved compactness, ruggedness, manufacturability and functionality compared to their traditional bulk counterparts. Optical phase-change materials (PCMs) offer an appealing material solution for active metasurface devices with their large index contrast and non-volatile switching characteristics. Here we report a large-scale, electrically reconfigurable non-volatile metasurface platform based on optical PCMs. The optical PCM alloy used in the devices, Ge Sb Se Te (GSST), uniquely combines giant non-volatile index modulation capability, broadband low optical loss and a large reversible switching volume, enabling notably enhanced light-matter interactions within the active optical PCM medium. Capitalizing on these favourable attributes, we demonstrated quasi-continuously tuneable active metasurfaces with record half-octave spectral tuning range and large optical contrast of over 400%. We further prototyped a polarization-insensitive phase-gradient metasurface to realize dynamic optical beam steering.