Graphene Thermal Emitter with Enhanced Joule Heating and Localized Light Emission in Air

Luo, Fang; Fan, Yansong; Peng, Gang; Xu, Shuigang; Yang, Yaping; Yuan, Kai; Liu, Jinxin; Ma, Wei; Xu, Wei; Zhu, Zhi; Zhang, Xueao; Mishchenko, Artem; Ye, Yu; Huang, Han; Han, Zheng; Ren, Wencai; Novoselov, Kostya S.; Zhu, Mengjian; Qin, Shiqiao

doi:10.1021/acsphotonics.9b00667

Cited by 67 publications

(62 citation statements)

References 40 publications

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“…The emission spectrum shown in Figure 1C indicated a characteristic emission peak of the graphene device at approximately 8.0 µm. This characteristic emission peak changed slightly with input power, contrary to Planck's radiation law but consistent with a recent report by Luo et al . We believe this phenomenon was caused by both the characteristics radiation of graphene and the resonance between the graphene and PET membrane inside the device.…”

Section: Resultssupporting

confidence: 91%

A Graphene‐Based Flexible Device as a Specific Far‐Infrared Emitter for Noninvasive Tumor Therapy

Gao

et al. 2020

Advanced Therapeutics

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Noninvasive treatments are emerging as a promising strategy not only due to their non‐invasive nature, but also due to their additive effects to traditional radiotherapy and chemotherapy. Herein, specific far‐infrared rays generated from single‐layer, graphene‐based devices are applied to tumors as a novel noninvasive therapeutic strategy. In MDA‐MB‐231 breast cancer cell xenograft and metastasis models, irradiation generated from this flexible device reduces the rate of tumor growth and the number of metastatic nodules per lung by 42% and 55%, respectively. This result might be induced by the similarity between the emission spectra of the device and the absorption spectra of the living tissue. With its high energy conversion and safety, the graphene‐based device can serve as an adjuvant therapeutic instrument for combined tumor treatment.

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Section: Resultssupporting

confidence: 91%

A Graphene‐Based Flexible Device as a Specific Far‐Infrared Emitter for Noninvasive Tumor Therapy

Gao

et al. 2020

Advanced Therapeutics

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“…We display only one full 0-10V I-V for w = 3 µm, since the device was broken afterwards; other identical devices displayed a damage threshold of ~7 V, which is in good agreement with similar devices. [64] On the contrary, devices with w= 5 µm and w = 10 µm performed well even after driving with up to 10 V. Figure 1e. The total resistance is independent of voltage within our measurement accuracy.…”

Section: Resultsmentioning

confidence: 94%

Reversible Switching of Optical Phase Change Materials Using Graphene Microheaters

Rı́os¹,

Zhang²,

Deckoff-Jones³

et al. 2019

Conference on Lasers and Electro-Optics

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Reconfigurable photonic systems featuring minimal power consumption are crucial for integrated optical devices in real-world technology. Current active devices available in foundries, however, use volatile methods to modulate light, requiring a constant supply of power and significant form factors. Essential aspects to overcoming these issues are the development of nonvolatile optical reconfiguration techniques which are compatible with on-chip integration with different photonic platforms and do not disrupt their optical performances. In this paper, a solution is demonstrated using an optoelectronic framework for nonvolatile tunable photonics that employs undopedgraphene microheaters to thermally and reversibly switch the optical phase-change material Ge2Sb2Se4Te1 (GSST). An in-situ Raman spectroscopy method is utilized to demonstrate, in realtime, reversible switching between four different levels of crystallinity. Moreover, a 3D computational model is developed to precisely interpret the switching characteristics, and to quantify the impact of current saturation on power dissipation, thermal diffusion, and switching speed. This model is used to inform the design of nonvolatile active photonic devices; namely, broadband Si3N4 integrated photonic circuits with small form-factor modulators and reconfigurable metasurfaces displaying 2π phase coverage through neural-network-designed GSST meta-atoms. This framework will enable scalable, low-loss nonvolatile applications across a diverse range of photonics platforms.

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“…Figure 6a plots a color map of the G band position as a function of laser power, showing a continuous redshift with increasing laser power. We estimated the steady-state temperature T of TLG under laser irradiation using an established coefficient γ (0.011 cm −1 K −1 < γ < 0.016 cm −1 K −1 ) between the G band shift (Δ v ) and lattice temperature of TLG: T = 300 + Δ ω G / γ , where Δ ω G is the laser heating-induced downshift of the Raman G peak 40 – 43 . As shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Light-induced irreversible structural phase transition in trilayer graphene

et al. 2020

Self Cite

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A crystal structure has a profound influence on the physical properties of the corresponding material. By synthesizing crystals with particular symmetries, one can strongly tune their properties, even for the same chemical configuration (compare graphite and diamond, for instance). Even more interesting opportunities arise when the structural phases of crystals can be changed dynamically through external stimulations. Such abilities, though rare, lead to a number of exciting phenomena, such as phase-change memory effects. In the case of trilayer graphene, there are two common stacking configurations (ABA and ABC) that have distinct electronic band structures and exhibit very different behaviors. Domain walls exist in the trilayer graphene with both stacking orders, showing fascinating new physics such as the quantum valley Hall effect. Extensive efforts have been dedicated to the phase engineering of trilayer graphene. However, the manipulation of domain walls to achieve precise control of local structures and properties remains a considerable challenge. Here, we experimentally demonstrate that we can switch from one structural phase to another by laser irradiation, creating domains of different shapes in trilayer graphene. The ability to control the position and orientation of the domain walls leads to fine control of the local structural phases and properties of graphene, offering a simple but effective approach to create artificial two-dimensional materials with designed atomic structures and electronic and optical properties.

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Graphene Thermal Emitter with Enhanced Joule Heating and Localized Light Emission in Air

Cited by 67 publications

References 40 publications

A Graphene‐Based Flexible Device as a Specific Far‐Infrared Emitter for Noninvasive Tumor Therapy

A Graphene‐Based Flexible Device as a Specific Far‐Infrared Emitter for Noninvasive Tumor Therapy

Reversible Switching of Optical Phase Change Materials Using Graphene Microheaters

Light-induced irreversible structural phase transition in trilayer graphene

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