Higher frequency enhancement of terahertz-radiation spectrum from n-type InAs by using shorter excitation pulse

摘要

The high-frequency component of the THz-radiation spectrum from a magnetic-field immersed n-type InAs is enhanced by using laser pulses with duration shorter than the oscillation period of the hybrid modes. Such a high-frequency component is found to originate from the hybrid modes of the plasmons and the longitudinal optical (LO) phonons.