A Jauns multi-transconductor predicated on one-dimensional quasi-conjugate topological crystals heterojunction leveraging Goos-Hänchen and polarization effect

To address the increasing demand for micro-detection with high accuracy and bridge the gap in the application of topological photonics to Goos-Hänchen (GH) effects, an unprecedented Janus multi-transconductor predicated on the novel one-dimensional quasi-conjugate topological photonics crystals (1D QTCs) operating in the terahertz band is established. Calculated by the transfer matrix and stationary phase methods, the proposal sets forth a multi-transduction scheme correlating double physical parameters including refractive index, and magnetic field intensity with the polarization state and GH lateral shift. As a GH amplitude transconductor, antipodal enhanced GH shift values with disparate orders of magnitude and sensitivities are elicited in the forward incidence (FI) and backward incidence (BI) modes, and the GH differential measurement (GDM) method is first introduced to expand the detection window. Moreover, the Jauns sensitivity could be seamlessly modulated by the external magnetic field of the indium antimonide layer. As a polarization transconductor, manipulating the two physical parameters could result in polarization conversion in BI mode, but only quasi-LPWs are obtained in FI mode. Conversely, the polarization state could transduce the physical parameters and GH shift. The proposal constitutes an invaluable reference for advancing the application of topological photonics and the GH effect.