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Fast-switchable, high diffraction-efficiency ferroelectric liquid crystal Fibonacci grating
- Source :
- Optics express. 29(9)
- Publication Year :
- 2021
-
Abstract
- Low-voltage fast switchable 1D and 2D Fibonacci grating (FbG), using an electrically suppressed helix ferroelectric liquid crystal (ESHFLC), with high diffraction efficiency for a super-resolution imaging system in far-field are disclosed in this paper. Specifically, the polarization-independent two-domain (0, π) structure is well designed based on photoalignment technology to maximize the total diffraction efficiency that can reach 97.4% (1st order:8.5%, 2nd order: 30%). Apart from that, the FLC gratings offer two tunable states: non-diffractive and diffractive states. Derived from the fast-response property of ferroelectric liquid crystal material, the switching speed of the 1D and 2D ESHFLC-FbG is 103µs at 4 V of the driving voltage. Furthermore, this system achieves the high-resolving power of (λ/2.25) for object detection based upon the intensity map received behind 1D ESHFLC-FbG at far-field. Contribution from the quasi-periodic FbG’s special ability to translate the super-resolution information (including at evanescent wave) into the detectable far-field region. Concisely, the proposed ESHFLC-FbG can be a promising candidate for a super-resolution imaging system, superstructure fibre sensor, and other photonic applications.
- Subjects :
- Materials science
business.industry
02 engineering and technology
Grating
021001 nanoscience & nanotechnology
Diffraction efficiency
01 natural sciences
Ferroelectricity
Atomic and Molecular Physics, and Optics
010309 optics
Switching time
Optics
Liquid crystal
0103 physical sciences
Near-field scanning optical microscope
Photonics
0210 nano-technology
business
Superstructure (condensed matter)
Subjects
Details
- ISSN :
- 10944087
- Volume :
- 29
- Issue :
- 9
- Database :
- OpenAIRE
- Journal :
- Optics express
- Accession number :
- edsair.doi.dedup.....86d3c3cfb95b490723d0bbd63e4fe9c0