Patent ID: 9105791
Filing Date: 2015-08-11
Classification: H01L

Abstract:
1. A tunable plasmonic crystal, comprising: a layer providing a two-dimensional electron gas (2DEG) or a two-dimensional hole gas (2DHG), wherein the layer is formed at a semiconductor heterojunction comprising InGaAs/InAlAs, GaN/AlGaN, or GaSb/InAs; a periodic gate comprising at least two parallel finger electrodes disposed on the 2DEG or 2DHG layer; means for applying a gate voltage to the periodic gate to modulate the electron density in the 2DEG layer; or the hole density in the 2DHG layer, thereby producing a spatially periodic plasmon structure having a unit cell; and means to couple incident electromagnetic radiation into the 2DEG or 2DHG layer; wherein the spatially periodic plasmon structure produces a plasmonic band structure when interacting with the incident electromagnetic radiation.