Implantable, Degradable, Therapeutic Terahertz Metamaterial Devices

Sun, Lei; Zhou, Zhitao; Zhong, Junjie; Shi, Zhifeng; Mao, Ying; Li, Hua; Cao, Juncheng; Tao, Tiger H.

doi:10.1002/smll.202000294

Cited by 25 publications

(14 citation statements)

References 36 publications

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“…[19] implantable medical devices, [20][21][22] and secure data storage systems. [23] Although the transient devices have been studied a lot and a variety of devices such as transient battery, [24,25] transient metamaterial devices (THz MMs), [26] and transient storage devices [27] have been demonstrated, controlled…”

Section: Doi: 101002/adma202201035mentioning

confidence: 99%

A Hierarchically Encoded Data Storage Device with Controlled Transiency

et al. 2022

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In the era of information explosion, high‐security and high‐capacity data storage technology attracts more and more attention. Physically transient electronics, a form of electronics that can physically disappear with precisely controlled degradation behaviors, paves the way for secure data storage. Herein, the authors report a silk‐based hierarchically encoded data storage device (HEDSD) with controlled transiency. The HEDSD can store electronic, photonic, and optical information simultaneously by synergistically integrating a resistive switching memory (ReRAM), a terahertz metamaterial device, and a diffractive optical element, respectively. These three data storage units have shared materials and structures but diverse encoding mechanisms, which increases the degree of complexity and capacity of stored information. Silk plays an important role as a building material in the HEDSD thanks to its excellent mechanical, optical, and electrical properties and controlled transiency as a naturally extracted protein. By controlling the degradation rate of storage units of the silk‐based HEDSD, different degradation modes of the HEDSD, and multilevel information encryption/decryption have been realized. Compared with the conventional memory devices, as‐reported silk‐based HEDSD can store multilevel complex information and realize multilevel information encryption and decryption, which is highly desirable to fulfill the future demands of secure memory systems and implantable storage devices.

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Section: Doi: 101002/adma202201035mentioning

confidence: 99%

A Hierarchically Encoded Data Storage Device with Controlled Transiency

et al. 2022

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“…Based on the same operation principle of controlled silk degradation, metamaterial devices able to work as transient, implantable and drug-delivery systems have been fabricated by patterning split ring resonators made of electrically conductive, biocompatible, and biodegradable metals on flexible silk substrates [65]. Both the metamaterial and the silk substrate can be programmed to independently affect the time-dependent resonance frequency response, respectively, by controlling the initial conformation of the silk matrix, as previously discussed ( Figure 4G), and by using metals with different dissolution rates ( Figure 4H).…”

Section: Physically Transient Opticsmentioning

confidence: 99%

Active optics with silk

2020

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Optical devices have been traditionally fabricated using materials whose chemical and physical properties are finely tuned to perform a specific, single, and often static function, whereby devices’ variability is achieved by design changes. Due to the integration of optical systems in multifunctional platforms, there is an increasing need for intrinsic dynamic behavior, such as devices built with materials whose optical response can be programmed to change by leveraging the material’s variability. Here, regenerated silk fibroin is presented as an enabler of devices with active optical response due to the protein’s intrinsic properties. Silk’s abilities to controllably change conformation, reversibly swell and shrink, and degrade in a programmable way affect the form and the response of the optical structure in which it is molded. Representative silk-based devices whose behavior depends on the silk variability are presented and discussed with a particular focus on structures that display reconfigurable, reversibly tunable and physically transient optical responses. Finally, new research directions are envisioned for silk-based optical materials and devices.

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“…[9][10][11][12][13] Nowadays, the key disadvantages of conventional plasmonic devices include the inconveniences of electrical tunability and high dissipation losses. Novel emerging materials, such as black phosphorus, transition metal molybdenum disulfide, and topological materials, [14][15][16][17][18] provide good platforms for the exploration flexible functional devices.…”

Section: Introductionmentioning

confidence: 99%

3D Dirac Semimetal Supported Tunable TE Modes

Liu

Shi

2022

Annalen der Physik

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The tunable propagation properties of transverse electric (TE) plasmonic modes have been investigated in the mid-IR spectral region by using air-Dirac semimetal (DSM)-Si asymmetric structures, including the effects of Fermi levels, temperatures, and scattering times. The results manifest that on the condition that the Fermi level of DSM layer is not very large (2|𝝁 c |<ℏ𝝎) and temperature is relatively high (about 100 K), the proposed DSM asymmetric structure supports obvious TE modes, which is quite different from the graphene symmetric structure limited to low liquid helium temperature. The transition frequency increases with Fermi level, the peak position of the real part and the saturation region of the imaginary part of effective index indicates an obvious blue shift. As temperature decreases, the contribution of interband transition becomes stronger, the 3D DSM indicates better dielectric properties and sustains stable TE mode. If scattering time is shorter than 0.1 ps, its effects on the propagation properties are very strong, resulting in a redshift of the real part of effective index. The results are very helpful to understand the tunable properties of DSM TE structures and aid the design of novel plasmonic devices, such as polarizers, modulators, and filters.

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Implantable, Degradable, Therapeutic Terahertz Metamaterial Devices

Cited by 25 publications

References 36 publications

A Hierarchically Encoded Data Storage Device with Controlled Transiency

A Hierarchically Encoded Data Storage Device with Controlled Transiency

Active optics with silk

3D Dirac Semimetal Supported Tunable TE Modes

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