Tunability and Optimization of Coupling Efficiency in Tamm Plasmon Modes

Chang, Che-Yuan; Chen, Yi‐Hsuan; Tsai, Yu‐Lin; Kuo, Hao‐Chung; Chen, Kuo‐Ping

doi:10.1109/jstqe.2014.2375151

Cited by 39 publications

(22 citation statements)

References 28 publications

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“…1c). Such a conspicuous transformation of the Bragg mirror's reflectivity spectrum signifies the excitation of the Tamm plasmon, as has previously been shown in a number of works [2,18,19,20,21]. Quite remarkably, the Bragg mirror, when combined with the metasurface, also appeared to support Tamm plasmons, exhibiting a similar reflectivity dip in the same spectral window (red curve in Fig.…”

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confidence: 74%

Observing and controlling a Tamm plasmon at the interface with a metasurface

et al. 2020

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We demonstrate experimentally that Tamm plasmons in the near-IR can be supported by a dielectric mirror interfaced with a metasurface, a discontinuous thin metal film periodically patterned on the sub-wavelength scale. More crucially, not only do Tamm plasmons survive the nano-patterning of the metal film, but they also become sensitive to external perturbations, as a result. In particular, by depositing a nematic liquid crystal on the outer side of the metasurface we were able to red-shift the spectral position of Tamm plasmon by 35 nm, while electrical switching of the liquid crystal enabled us to tune the wavelength of this notoriously inert excitation within a 10 nm range.A Tamm plasmon (TP) is a localized resonant optical state, a quasi-particle, which exists at the interface between a metal and a dielectric (or semiconductor) Bragg mirror. It was theoretically predicted in [1] and experimentally observed in [2]. The TP dispersion lies completely within the light cone and therefore, in contrast to an ordinary surface plasmon polariton, a Tamm plasmon can be excited with both TE and TM polarized light at any angle of incidence [1]. Another advantage of a Tamm plasmon over a surface plasmon polariton is that the former appears to be almost insensitive to dissipative losses in the metal film since its electromagnetic fields are localized predominantly in the non-absorbing Bragg mirror [3]. Because of its robust nature, a Tamm plasmon has been regarded as a viable alternative to conventional surface plasmons in a wide range of applications, including refractive index sensing, optical switches, semiconductor lasers, and temperature sensors [4,5,6,7,8,9,10]. For many practical applications it is important to realize an external dynamic control over the TP wavelength. Such a task, however, presents a formidable challenge given that the fields of a Tamm plasmon reside inside the Bragg mirror and, therefore, are very difficult to access from the outside. Correspondingly, most of the approaches proposed so far involved the integration of a control element into the very structure of the Bragg mirror [4,6,11,12,13,14], which may not always appear feasible. It has also been shown that the wavelength of a Tamm plasmon could change (although irreversibly) as a result of the lateral confinement of its fields achieved by patterning the metal film on the microscale [3,15,16].In this Letter we report on the first experimental observation of a near-IR Tamm plasmon at the interface between a Bragg mirror and a nano-patterned metal film acting as a nondiffracting optical metasurface. We found that the discrete framework of the metasurface exposed Tamm plasmon to external perturbations, such as changes of the refractive index in an adjacent medium, which enabled us to dynamically control the wavelength of this weakly coupled optical state in a simple yet efficient way.

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confidence: 74%

Observing and controlling a Tamm plasmon at the interface with a metasurface

et al. 2020

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“…Since both TE and TM waves can excite TPPs, TPP structures are polarization independent. The tunability of TPPs can be readily achieved by changing the stop band of the DBR [22]. So far, TPPs have been studied from various directions, such as theoretical studies on eigenmodes [23], combination with metamaterials [24], propagating and non-propagating TPPs [25], luminescence enhancement [26], and selective thermal emitters [27].…”

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confidence: 99%

Narrowband Wavelength Selective Thermal Emitters by Confined Tamm Plasmon Polaritons

et al. 2017

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Infrared wavelength selective thermal emission based on Tamm plasmon polaritons (TPPs) is experimentally demonstrated. Unlike conventional TPP structures having a thin metal layer on a DBR, the proposed structure has a thick metal under a DBR which is more robust for thermal radiation. The number of DBR pairs is a critical factor to maximize the narrowband emission: It has to satisfy the impedance matching condition, which varies with the choice of metal film. The proposed structure can achieve twice higher Q-factor for the measured emissivity compared to typical plasmonic thermal emitters. The structure is one dimensional, only consists of multilayers, and free from nano-patterning, offering a practical design in applications such as gas sensing, narrowband IR sources and in thermophotovoltaics. TOC

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“…In the energy spectra of a sample, the TPP can be seen as a narrow peak [2][3][4]. The spectral properties of the TPP can be controlled by varying the lattice parameters [5] or metallic film material [6]. The TPPs gave rise to the fundamentally new type of devices, which includes absorbers [7][8][9][10], switches [11], organic solar cells [12], thermal emitters [13,14], sensors [15,16] and spontaneous emission amplifiers [17].…”

Section: Introductionmentioning

confidence: 99%

Transparent conductive oxides for the epsilon-near-zero Tamm plasmon polaritons

2019

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We demonstrated the possibility of using transparent conducting oxides (AZO, GZO, ITO) to form Tamm plasmon polaritons in the near-infrared spectral range where the permitivity of oxides is near-zero. The spectral properties of the structures have been investigated in the framework of the temporal coupled mode theory and confirmed by transfer matrix method. It was found that in the critical coupling conditions the maximal Q-factor of a Tamm plasmon polariton is achieved when photonic crystal is conjugated with the AZO film, while at the conjugation with the ITO films the broadest spectral line is obtained. The sensitivity of the wavelength and spectral width of the Tamm plasmon polariton to changes of the oxide film thickness, the bulk concentration of a dopand and the angle of incidence are demonstrated.

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Tunability and Optimization of Coupling Efficiency in Tamm Plasmon Modes

Cited by 39 publications

References 28 publications

Observing and controlling a Tamm plasmon at the interface with a metasurface

Observing and controlling a Tamm plasmon at the interface with a metasurface

Narrowband Wavelength Selective Thermal Emitters by Confined Tamm Plasmon Polaritons

Transparent conductive oxides for the epsilon-near-zero Tamm plasmon polaritons

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