Back to Search Start Over

Nondestructive readout of holographic memory in Ag/TiO2 heterojunction via carbon-dots and hydrogel co-modification

Authors :
Yichun Liu
Xiuli Wang
Xintong Zhang
Hongfang Liu
Jiahui Zhou
Yiqian Wang
Shencheng Fu
Xin Li
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.

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