Jie LONG, Jiu-sheng LI. Terahertz Phase Shifter Based on Grating-Liquid Crystal Hybrid Structure[J]. Spectroscopy and Spectral Analysis, 2021, 41(9): 2717
- Spectroscopy and Spectral Analysis
- Vol. 41, Issue 9, 2717 (2021)
Fig. 1. Schematic diagram of terahertz phase shifter
(a): Three-dimensional diagram; (b): Two-dimensional diagram of the bottom silicon grating; (c): Terahertz wave transmission model in the terahertz phase shifter
(a): Three-dimensional diagram; (b): Two-dimensional diagram of the bottom silicon grating; (c): Terahertz wave transmission model in the terahertz phase shifter
Fig. 2. Terahertz waves diffraction efficiency under different grating constants
Fig. 3. Terahertz diffraction intensity at different grating constants
(a):d =60 μm; (b): d =61 μm; (c): d =62 μm; (d): d =63 μm; (e): d =64 μm; (f): d =65μm
(a):
Fig. 4. Diffraction efficiency of terahertz waves through phase shifter for different liquid crystal materials with dielectric constant ε ⊥=2.47 (without applied electric field) and ε //=3.26 (with applied electric field)
Fig. 5. Terahertz wave diffraction intensity at different dielectric constants of liquid crystal materials
(a):ε ⊥=2.47; (b): ε //=3.26
(a):
Fig. 6. Phase curves of terahertz waves phase shifter under different dielectric constants of liquid crystal
Fig. 7. Phase curve of terahertz wave transmission through the phase shifter
(a): Single frequency point curve at different incident angles; (b): Single frequency point curve under TE and TM polarization
(a): Single frequency point curve at different incident angles; (b): Single frequency point curve under TE and TM polarization
Fig. 8. Terahertz wave phase shifter loss curve
(a): Return loss; (b): Insertion loss
(a): Return loss; (b): Insertion loss
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