THz plasmonic absorption in periodically patterned semiconductor ribbons

In this work we provide a new outlook on plasmonic effects in periodically patterned semiconductor ribbons. Based on the classical electromagnetic theory we develop an analytical model to represent these effects and show that: 1. THz plasmons can be excited at room temperature in periodically patterned semiconductor 2DEGs (regardless of the semiconductor material); 2. its strength and frequency dependence heavily depends in the surrounding dielectric environment. Moreover, we discuss how the plasmon resonance frequency and extinction magnitude can be effectively tuned by controlling the electron concentration and pattern size, which shows great potential for THz signal modulation.