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An Optical/Ferroelectric Multiplexing Multidimensional Nonvolatile Memory from Ferroelectric Polymer.

Shan He¹, Mengfan Guo¹, Yue Wang¹

¹School of Materials Science and Engineering, State Key Lab of New Ceramics and Fine Processing, Tsinghua University, Beijing, 100084, China.

Advanced Materials (Deerfield Beach, Fla.)

|April 11, 2022

Summary

This summary is machine-generated.

Researchers developed a novel polymer memory using poly(vinylidene fluoride) (PVDF) that stores data using both optical and ferroelectric signals. This breakthrough achieves high storage density and data security for advanced nano-memory applications.

Keywords:

ferroelectric storage memory devices multidimensional storage phase transitions poly(vinylidene fluoride)

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Area of Science:

Materials Science
Nanotechnology
Data Storage

Background:

Multiplexing physical dimensions in a single material is key for increasing storage density and data security.
Multidimensional storage has primarily been limited to optical storage materials (OSM).
Poly(vinylidene fluoride) (PVDF) is a semicrystalline polymer investigated for ferroelectric random access memory (FeRAM).

Purpose of the Study:

To demonstrate multidimensional storage in PVDF using multiplexed optical and ferroelectric signals.
To achieve high data security and storage density in a novel nano-memory device.
To expand the range of materials capable of physical dimension multiplexing beyond OSM.

Main Methods:

Utilized atomic force microscopy (AFM)-based infrared spectroscopy to induce and read multilevel phase transformations in PVDF ultrathin films.
Developed a multiplexing memory device combining optical (IR) and ferroelectric signals.
Investigated the distinct critical temperatures for optical data phase transformation and ferroelectric data polarization switching.

Main Results:

Demonstrated an optical/ferroelectric multiplexing PVDF memory device.
Achieved simultaneous high data security and a storage density of up to 180 GBit/mm².
Showcased the memory's ability to function as both optical read-only memory and FeRAM due to differing critical temperatures.

Conclusions:

Successfully expanded physical dimension multiplexing to a polymer material (PVDF) for the first time, moving beyond OSM.
Opened new avenues for high-capacity, multifunctional nano-memory devices.
The proposed strategy enables tunable programming on IR waves, paving the way for active nano-optical devices.