Lutong Cai

Oct 20, 2024 | mdpi.com | Tao Yang |Lutong Cai |Zhanhua Huang |Lin Zhang

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Mar 1, 2024 | opg.optica.org | Hao Zhang |Lutong Cai |Zhuang Ma |Lin Zhang

We propose a single-layer graphene electro-absorption modulator (EAM) with an angled waveguide sidewall. By utilizing the hybridization of the TM0 mode and the TE1 mode in the waveguide, the light–graphene interaction is enhanced. A modulation depth of 0.124 dB/µm and a figure of merit up to 25 are obtained at 1550 nm.

Sep 25, 2023 | mdpi.com | Xin Tong |Lutong Cai |Lin Zhang

3.2. Acoustic ForceTo efficiently excite acoustic waves by an IDT, we first evaluate the electromechanical coupling coefficient, which is an indicator of the efficiency with which a piezoelectric material converts electrical energy to mechanical energy. The electromechanical coupling coefficient can be obtained by comparing the acoustic velocity in the presence and absence of a perfect conductor on the piezoelectric material surface [49].