A logic-arithmetic device and detector based on second harmonic generation with a layered hyperstructure

Abstract

Second harmonic generation (SHG) is a process that doubles the frequency of electromagnetic waves (EMWs), aiding in the expansion of the operating frequency range of instruments and measurement devices, enhancing measurement capabilities. The proposed one-dimensional quasi-periodic layered hyperstructure (QPLHS) serves as both a NOT logic arithmetic device and a multi-range, multi-physical quantity detector. Due to the magneto-optical effect of InSb exhibiting Janus properties for different incident directions of EMWs, a different range of detection for the refractive index and magnetic field is achieved, expanding the measurement range. At an ambient temperature of 300 K, the second harmonic transmission exceeds 0.9, indicating a logic value of 1, while at a temperature of 200 K, the transmission of the second harmonic resonance peak is less than 0.1, indicating a logic value of 0. The contrast ratios of transmission reach 44 dB, achieving a NOT logic arithmetic device. The designed QPLHS holds significant potential in measurement due to its versatility.