Ultrafast Optical Heating Induced Polarization-Dependent Optical Switching in Gold Nanowires

Wang, Yimeng; Fang, Xiaohui

doi:10.3390/app7010046

Cited by 8 publications

(4 citation statements)

References 19 publications

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“…Interfacial plasmons induced at these gaps may be modified due to optical heating by femtosecond laser pulses, where thermal expansion of the gold nanostructures changes the gap widths, as shown in Figure 8B. The "breathing" effect of the interfacial plasmon is responsible for the optical switching effect [35]. Furthermore, silver-coated gold nanorods [12] and gold nanoprism dimer [17] have been demonstrated as ultrafast optical switching structures.…”

Section: Noble Metalsmentioning

confidence: 99%

“…Two-dimensional (2D) design can be defined as structures with plasmon resonance or plasmonic hotspots located in the same plane that is generally parallel to the substrate. 2D periodical [10,19,28,35] and non-periodical [26,27] metallic nanostructures on planar substrates are most general designs of optical switching devices. A more typical design of a 2D periodic array of gold nanostructures is shown in Figure 12 [42].…”

Section: Two-dimensional Designmentioning

confidence: 99%

“…(B) Femtosecond optical switch based on the optical heating of the interfacial palsmons induced at the gaps of discontinuous gold nanowires. Reproduced with permission[35]. Copyright 2017, the authors.…”

mentioning

confidence: 99%

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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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Section: Noble Metalsmentioning

confidence: 99%

Section: Two-dimensional Designmentioning

confidence: 99%

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Ultrafast Plasmonic Optical Switching Structures and Devices

Zhang

Yang

2019

Front. Phys.

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“…In contrast to the 0D nanostructure, 1D and 3D nanostructures display additional advantages in terms of manipulation and electrical contacting, which facilitate their integration in nanodevices [27]. Nanoporous Au thin films (AuTFP) and nanowires have attracted extensive interest for the development of a platform for a novel type of biosensor [31,[34][35][36] and ultrafast switches [35,37]. It is worth mentioning that AuTFPs can be seen as a network, at the nanoscale, of Au nanoligaments with non-uniform diameters [38].…”

Section: Introductionmentioning

confidence: 99%

Polarization-dependent ultrafast plasmon relaxation dynamics in nanoporous gold thin films and nanowires

Peckus¹,

Chauvin²,

Tamulevičius³

et al. 2019

J. Phys. D: Appl. Phys.

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Metal materials structured at nanoscale are extensively used in a variety of applications, including molecular sensing, nanoscale heaters for photothermal therapy, etc. These applications depend on the strong absorption and electric field enhancements associated with localized surface plasmon resonance (LSPR). Despite multiple investigations of LSPR relaxation dynamics in plasmonic metallic nanoparticles (i.e. nanospheres, nanocubes, etc), no detailed studies of porous thin films or nanowires have been reported so far. In this paper, LSPR relaxation dynamics of nanoporous gold thin film, gold nanowires, and nanoporous gold nanowires (structures with the potential for a vast range of sensing and optical applications) were studied by means of transient absorption spectroscopy (TAS). Au and Au/Cu thin films produced by magnetron sputtering deposition over a nanograted silicon substrate enabled the creation of highly organized nanowire arrays of centimetres length. Nanoporous structures were created by the dealloying of Au/Cu alloy. We found that formation of such a subwavelength period grating structure in gold increases the efficiency of hot electron relaxation compared to continuous film, while the porosity of gold nanostructures has the opposite effect. The results also expressed a clear dependence of the TAS signal on the polarization (i.e. orientation of the electric field with respect to the nanoporous gold nanowires) of the pump and probe pulses, compared to non-porous gold nanowires.

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Optical Fiber Delivered Ultrafast Plasmonic Optical Switch

Yang

2021

Advanced Science

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Ultrafast optical switch based on plasmonic nanostructures has large application potentials in optical logic circuits and optical communication systems. Integration of plasmonic optical switching devices with optical fibers is a breakthrough for realizing practical applications in long-range optical data transmission or communication techniques. Here, the incorporation of plasmonic optical switch devices onto the end facets of optical fibers is reported, so that the switched optical signals are generated by interaction between femtosecond laser pulses and plasmonic nanostructures on one end of the fiber, and are delivered via the fiber waveguide to the other end for detection or decoding. "Quenching" of localized surface plasmon in the gold nanowires by its interaction with band-edge modulation in gold through strong optical excitation is the responsible photophysics. This work accomplishes for the first time the implementation of ultrafast plasmonic optical switch device on optical fiber tips for logic data transmission.

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Ultrafast Optical Heating Induced Polarization-Dependent Optical Switching in Gold Nanowires

Cited by 8 publications

References 19 publications

Ultrafast Plasmonic Optical Switching Structures and Devices

Ultrafast Plasmonic Optical Switching Structures and Devices

Polarization-dependent ultrafast plasmon relaxation dynamics in nanoporous gold thin films and nanowires

Optical Fiber Delivered Ultrafast Plasmonic Optical Switch

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