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Nondestructive readout of holographic memory in Ag/TiO2 heterojunction via carbon-dots and hydrogel co-modification
- Source :
- Applied Physics Letters. 118:141601
- Publication Year :
- 2021
- Publisher :
- AIP Publishing, 2021.
-
Abstract
- Effective utilization of light energy is essential for the storage and conversion of optical information. Plasmonic nanoparticles are regarded as an optical energy antenna for their spectrum-tuning ability, while the multi-wavelength response and interface electron flow, in turn, weaken the stability in reading information. Herein, we propose a smart route of carbon dot/hydrogel co-modified silver nanoparticles in titania to construct a large-area Schottky heterojunction. The diffraction efficiency is increased by three times, and the readout stability is even increased by 240 times, compared with those for undecorated Ag/TiO2 heterostructures. The readout fluctuation ratio of the holographic signal is less than 3% in the area of 1.5 × 1.5 cm2. The enhanced performance benefits from the interface electron regulation by carbon dots and the high stability of Ag+ ions in hydrogel. Based on such properties, an 8-cm plasmonic holographic disk is fabricated, opening a bright way to the application of high-density information memory.
- Subjects :
- 010302 applied physics
Plasmonic nanoparticles
Materials science
Physics and Astronomy (miscellaneous)
business.industry
Holography
Physics::Optics
Schottky diode
chemistry.chemical_element
Heterojunction
02 engineering and technology
021001 nanoscience & nanotechnology
Diffraction efficiency
01 natural sciences
Silver nanoparticle
law.invention
chemistry
law
0103 physical sciences
Optoelectronics
0210 nano-technology
business
Carbon
Plasmon
Subjects
Details
- ISSN :
- 10773118 and 00036951
- Volume :
- 118
- Database :
- OpenAIRE
- Journal :
- Applied Physics Letters
- Accession number :
- edsair.doi...........32839f7e89450684d38ccd10c00c5513
- Full Text :
- https://doi.org/10.1063/5.0046810