Mid-infrared second-harmonic generation in ultra-thin plasmonic metasurfaces without a full-metal backplane

作者：Nookala Nishant; Xu Jiaming; Wolf Omri; March Stephen; Sarma Raktim; Bank Seth; Klem John; Brener Igal; Belkin Mikhail^*

来源：Applied Physics B: Lasers and Optics , 2018, 124(7): 132.

DOI：10.1007/s00340-018-7005-y

We report the design and operation of a nonlinear intersubband polaritonic metasurface for mid-infrared second harmonic generation. The metasurface is made of plasmonic nanoresonators filled with a multiple-quantum-well semiconductor heterostructure. Unlike the previously reported nonlinear intersubband polaritonic metasurfaces that employ full-metal backplanes below the etched metal-semiconductor nanoresonators, the metasurface reported here employs an incomplete backplane that is complementary to the pattern of the top metallization of the etched semiconductor heterostructure nanoresonators. The new approach produces high-electric-field localization and enhancement in the nanoresonators, while requiring simplified fabrication and allowing the metasurface to operate in both transmission and reflection regimes.

• 出版日期2018-7