Design And Analysis Of Photonic Devices Based On Optical Tamm Plasmon

All-optical integrated circuits are an important development direction of photonics fields. One of the keys is the realization of high-performance photonic devices. Photonic devices based on optical Tamm plasmon(OTP) have unique advantages, such as strong light-trapping ability, fast response and compact structure. So the application in optical switch, polariton laser, logical control, enhanced nonlinear effect and perfect absorber have attracted more attention in academia.Based on the remarkably enhancing intensity of OTP, Periodic waveguide structures are designed in this paper. High-performance refractive index sensor and polaritonic flip-flop operations in strong coupling regime are proposed. The detailed research contents and results are as follows:At first, the refractive index sensor based on OTP includes a high-refractive-index-contrast distributed Bragg reflector(DBR) and a metal layer, and the DBR is formed by alternating the air layer and dielectric layer. Therefore much fewer layers are enough to form OTP. Moreover, the air layers expose the optical field to the outer environment, enhancing the sensor sensitivity greatly. Formation of OTP generates a dip in the reflection spectrum of the structure. The reflectivity and wavelength of this dip are sensitive to variation of ambient refractive index. For practical applications, wavelength and intensity variations can be interrogated together to enhance the measuring range and the sensitivity simultaneously. In addition, the influence of metal thickness, injection angle and polarization on sensing sensitivity is discussed, which can be used for the additional control parameters.Next, the interaction between OTP and cavity exciton is discussed by sandwiching a quantum well between a gold layer and a DBR. The strong coupling between the QW exciton and the free OTP results the Rabi splitting and generation of A new type of cavity polariton- Tamm plasmon polariton(TPP). In addition, if a second gold-layer is introduced into the bottom of the DBR, two independent free OTPs can interact strongly with the QW excitons. According to the detuning between OTP energy and exciton enery, the location of Rabi splitting and energy of TPPs can be decided.At last, based on the presence of TPP in the strong coupling regime, this paper also proposes a novel optical flip-flop operation(FFO) method using bistability and polarization property of microcavity polaritons, which takes advantages of low-threshold and fast response. Through introducing and combining additional optical pulses with different polarizations, both intensity and polarization FFOs of polaritons are realized separately or simultaneously. Then, influence of amplitude or width of the optical pulses is also discussed so as to optimize switching time of FFO.