The invention discloses a
graphene photonic crystal terahertz
amplifier and a regulating and control method thereof. Due to the characteristics that the
conductivity of
graphene at specific temperature and bias
voltage is a negative value in a terahertz
wave band, the
graphene can be used as a terahertz wave
gain medium, and the function of the terahertz
amplifier can be achieved by using a periodic 'graphene-
single crystal silicon layer' one-dimensional
photonic crystal structure. According to the graphene
photonic crystal terahertz
amplifier, different bias voltages can be applied by alternatively introducing positive and negative electrodes to the graphene which is periodically arranged, and active regulation and control on terahertz wave amplification and working frequency are achieved. As the one-dimensional
photonic crystal structure is combined with the terahertz
gain characteristics of the graphene, due to the
cascade connection of a plurality of pieces of graphene, and the photonic
band gap, the
slow light enhancement, the F-P effect and the mode competitive effect of the one-dimensional
photonic crystal structure, the
gain amplification coefficient and the Q-value of the terahertz
waves in a single transmission mode can be effectively increased, and the single-frequency terahertz wave output with the high gain and high Q-value is achieved. The graphene photonic
crystal terahertz amplifier works in a
frequency band of 1-2THz, the working frequency can be tuned according to working
voltage, the maximum output gain is greater than 30dB, the Q-value is greater than 50, and the graphene photonic
crystal terahertz amplifier is a large-format high-performance terahertz amplifier.