All-optical switching of localized surface plasmon resonance in single gold nanosandwich using GeSbTe film as an active medium

Hira, T.; Homma, Takayuki; Uchiyama, Takayuki; Kuwamura, Kenta; Kihara, Yuya; Saiki, Takanao

doi:10.1063/1.4906037

Cited by 37 publications

(22 citation statements)

References 30 publications

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“…If the gold is replaced by refractory metals (such as W and Mo), the GST‐based MIM thermal emitter can be reversibly switchable. In addition to thermal annealing, the reamorphization of the GST can also be realized using laser pulses or electrical stimulations . The typical switching time for electrical stimulation is several nanoseconds .…”

Section: Resultsmentioning

confidence: 99%

“…The emissivities, bandwidths and peak wavelengths can be continuously tuned by controlling the temperature that determines the crystallization fraction of GST. Except for the thermally tunable GST, the phase transitions of GST can also be induced by electrical or optical excitation, demonstrating potentials in ultrafast modulation of GST based matematerials. This ultrathin plasmonic metamaterials‐based thermal emitter paves the way towards the dynamic thermal emission control in fundamental science and can significantly benefit a number of applications, including radiative cooling, thermophotovoltaics and adaptive camouflage.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Dynamic Thermal Emission Control Based on Ultrathin Plasmonic Metamaterials Including Phase‐Changing Material GST

et al. 2017

Laser & Photonics Reviews

211

115

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Dynamic thermal emission control has attracted growing interest in a broad range of fields, including radiative cooling, thermophotovoltaics and adaptive camouflage. Previous demonstrations of dynamic thermal emission control present disadvantages of either large thickness or requiring sustained electrical or thermal excitations. In this paper, an ultrathin (∼0.023λ, λ is the emission peak wavelength) metal‐insulator‐metal plasmonic metamaterial‐based zero‐static‐power mid‐infrared thermal emitter incorporating phase‐changing material GST is experimentally demonstrated to dynamically control the thermal emission. The electromagnetic modes can be continuously tuned through the intermediate phases determined by controlling the temperature. A typical resonance mode, which involves the coupling between the high‐order magnetic resonance and anti‐reflection resonance, shifts from 6.51 to 9.33 μm while GST is tuned from amorphous to crystalline phase. This demonstration will pave the way towards the dynamical thermal emission control in both the fundamental science field and a number of energy‐harvesting applications.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Dynamic Thermal Emission Control Based on Ultrathin Plasmonic Metamaterials Including Phase‐Changing Material GST

et al. 2017

Laser & Photonics Reviews

211

115

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“…A single Au/GeSbTe/Au nanosandwich structure was demonstrated for LSPR switching process [1]. The key mechanism is the hybridized palsmonic mode between an Au nanorod and the Au film, where a GeSbTe layer is inserted between these two plasmonic structures.…”

Section: Localized Surface Plasmonsmentioning

confidence: 99%

“…Optical switching is indispensable in integrated optical logic circuits and optical communication systems [1][2][3][4][5][6]. High response speed, large modulation depth, and broadband acceptability or tunability are always expected for optical switching devices.…”

Section: Introductionmentioning

confidence: 99%

Ultrafast Plasmonic Optical Switching Structures and Devices

Zhang

Yang

2019

Front. Phys.

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Plasmonic structures possess rich physics related to the sensitivity of plasmon resonance to the change in the environmental dielectric constant, the enhanced light scattering and optical extinction, and the local field enhancement enabled strong light-matter interactions, which have been applied in refractive-index sensors, optical feedback in various micro-or nano-cavity lasers, surface enhanced Raman scattering spectroscopy, and high-sensitivity molecular detection. However, ultrafast optical response is another important aspect of plasmons, which can be utilized to achieve switching of optical signals in different spectral bands. These optical switching designs are very important for applications in optical logic circuits and optical communication system. In this review, we summarize a series of reports on ultrafast plasmonic optical switches, where we focus our discussions on the structural and device designs, instead of on their physics. By categorizing the designs of optical switches into different groups by their featured performances, we intend to propose the development trend and the commonly interested mechanisms of such ultrafast optical switches. We hope this review will supply helpful concepts and technical approaches for further development and new applications of ultrafast optical switching devices.

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“…Picosecond-order crystallization times have been reported for GST by femtosecond laser pulses [35,36]. Amorphization of GeSbTe has been achieved on the subpicosecond timescale with femtosecond laser pulse excitation [37]. In addition, GST retains its phase for years after removal of the external excitations.…”

Section: Introductionmentioning

confidence: 99%

Using phase-change materials to switch the direction of reflectionless light propagation in non-PT-symmetric structures

Veronis

Huang

Shen

et al. 2018

Active Photonic Platforms X

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Using phase-change materials to switch the direction of reflectionless light propagation in non-PT-symmetric structures," Proc. SPIE 10721, Active ABSTRACTWe introduce a non-parity-time-symmetric three-layer structure, consisting of a gain medium layer sandwiched between two phase-change medium layers for switching of the direction of reflectionless light propagation. We show that for this structure unidirectional reflectionlessness in the forward direction can be switched to unidirectional reflectionlessness in the backward direction at the optical communication wavelength by switching the phase-change material Ge 2 Sb 2 Te 5 (GST) from its amorphous to its crystalline phase. We also show that it is the existence of exceptional points for this structure with GST in both its amorphous and crystalline phases which leads to unidirectional reflectionless propagation in the forward direction for GST in its amorphous phase, and in the backward direction for GST in its crystalline phase. Our results could be potentially important for developing a new generation of compact active free-space optical devices. We also show that phase-change materials can be used to switch photonic nanostructures between cloaking and superscattering regimes at mid-infrared wavelengths. More specifically, we investigate the scattering properties of subwavelength three-layer cylindrical structures in which the material in the outer shell is the phase-change material GST. We first show that, when GST is switched between its amorphous and crystalline phases, properly designed electrically small structures can switch between resonant scattering and cloaking invisibility regimes. The contrast ratio between the scattering cross sections of the cloaking invisibility and resonant scattering regimes reaches almost unity. We then also show that larger, moderately small cylindrical structures can be designed to switch between superscattering and cloaking invisibility regimes, when GST is switched between its crystalline and amorphous phases. The contrast ratio between the scattering cross sections of cloaking invisibility and superscattering regimes can be as high as ~ 93%. Our results could be potentially important for developing a new generation of compact reconfigurable optical devices.

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All-optical switching of localized surface plasmon resonance in single gold nanosandwich using GeSbTe film as an active medium

Cited by 37 publications

References 30 publications

Dynamic Thermal Emission Control Based on Ultrathin Plasmonic Metamaterials Including Phase‐Changing Material GST

Dynamic Thermal Emission Control Based on Ultrathin Plasmonic Metamaterials Including Phase‐Changing Material GST

Ultrafast Plasmonic Optical Switching Structures and Devices

Using phase-change materials to switch the direction of reflectionless light propagation in non-PT-symmetric structures

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