The future wireless communications require different kinds of modulation functions to be integrated in a single intelligent device under different scenarios. Here, we propose a multi-scheme digital modulator to achieve this goal based on integrated spoof surface plasmon polaritons (SPP) in different frequency bands. By constructing switchable spoof SPP units, the propagating wave in the proposed spoof SPP waveguide can be manipulated in amplitude domain, frequency domain, and phase domain. As a proof of concept, the integrated multi-scheme digital modulator is experimentally verified to achieve at least three kinds of modulations, including amplitude shift keying, phase shift keying, and frequency shift keying, in a single digital spoof plasmonic waveguide. The simulated and measured results show that the modulator has excellent property of field confinement and is capable of frequency-domain modulation. Hence, the multi-scheme modulation property makes the proposed SPP digital modulator be an effective and reliable candidate for efficient manipulations of SPP waves and for advanced modulation technology

未来的无线通信需要在不同情况下将不同种类的调制功能集成到单个智能设备中。在这里，我们提出了一种多方案数字调制器，可以基于不同频带上的综合欺骗表面等离子体激元极化子（SPP）实现此目标。通过构造可切换的欺骗SPP单元，可以在幅度域，频域和相位域中操纵所提议的欺骗SPP波导中的传播波。作为概念的证明，集成多方案数字调制器经过实验验证，可以在单个数字欺骗等离子体激元波导中实现至少三种调制，包括幅度偏移键控，相移键控和频移键控。仿真和测量结果表明，该调制器具有良好的场约束性能，并且能够进行频域调制。因此，多方案调制特性使所提出的SPP数字调制器成为有效操纵SPP波和先进调制技术的有效和可靠的候选者。