Recently, it has been discovered that two-dimensional (2D) materials, such as MXene and graphene, possess strong absorption capabilities, and high THz wave shielding efficiency, which are associated with their abundant surface groups and high conductivity [
21,
22,
23]. In particular, MXenes, a class of 2D materials, possess exceptional electrical conductivity and mechanical flexibility, making them suitable candidates for THz shielding applications [
24,
25,
26]. Different from other 2D materials (such as graphene, h-BN or TMD), Ti
3C
2T
x nanosheets with high intrinsic electrical conductivity exhibit weak coupling effects and almost independently polarized entities [
27]. The weak interaction between nanosheets can induce surface plasmon resonance and promote the absorption of electromagnetic waves. For instance, a MXene film with a thickness of 12 μm demonstrates an impressive EMI SE of up to 17.0 dB for THz waves [
28]. The nanometer-thick MXene film shields about 70% of THz waves, including nearly 50% of incident electromagnetic waves being absorbed [
26]. However, achieving a balance between transparency and EMI shielding performance in MXene films proves to be a big challenge. This is primarily due to the reflection loss shielding mechanism in MXene films, which is a result of their high conductivity [
29]. While reducing the thickness of MXene films can enhance their transmittance, it also leads to a significant decrease in the reflection loss, thereby reducing the EMI SE [
30]. For instance, a 20 nm thick MXene film achieves a 90% transmittance, but only has an EMI SE value of 2.5 dB [
31,
32]. Recently, structuring of the thin film presents an effective approach to enhance their electromagnetic responses [
33,
34,
35,
36,
37]. For example, previous studies indicate that structuring a conductive film into periodic architectures can significantly amplify its local surface plasmon resonances (LSPRs) and facilitate the absorption of electromagnetic waves, particularly in the infrared and visible light spectrum [
38]. Moreover, the periodic structures can also improve the mechanical stability of the films. However, this improvement usually comes at the expense of sacrificing the transparency of the thin films.