Accumulation-layer hybridized surface plasmon polaritions at an ITO/LiNbO<sub>3</sub> interface

Wang, Yingce; Zhao, Hua; Huo, Dewang; Su, Hang; Wang, Chao

doi:10.1364/ol.44.000947

Cited by 7 publications

(2 citation statements)

References 25 publications

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“…As a result, a nominally p-polarization light beam to the interface is partially spolarized locally and vice versa [32]. With this picture in mind, one can understand that a p-polarized laser beam can excite at least two set of SPPs, one corresponding to the p-polarized light (TM), the other corresponding to s-polarized (TE) one, since hybridized SPPs can be supported with the 2DEG and the anisotropic substrate LN [33]. With this Z-cut slab, 2D phase gratings can be written [34], which can mediate two set of SPPs.…”

Section: Experiments and Discussionmentioning

confidence: 98%

Polarization and angle dependent subwavelength coupling and dramatic reflection enhancement/reduction from an ITO–LiNbO₃ interface

Wang

Zhao

Wang

et al. 2020

J. Phys. D: Appl. Phys.

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Two-dimensional electron gases (2DEGs) were demonstrated in indium–tin–oxide (ITO)-coated lithium niobate (LN) slabs by monitoring the very first reflection (VFR). Being dictated by light–matter interaction within the half-a-wavelength range, two-fold enhancement of the VFR was observed at one incidence angle, while two-and-half-fold reduction was obtained at another angle, when illuminating a Z-cut ITO–LN slab with two laser beams at 532 nm from the same side. In terms of exponential gain coefficient, such VFR enhancement/reduction corresponds to a range from −7.416 × 104 cm−1 to +4.68 × 104 cm−1, three orders of magnitude higher than that expected from the conventional photorefractive (PR) theory. The nanometer-thick 2DEG and the coupling role played by the evanescent field of the surface plasmon polaritons (SPPs) impose a much looser coherency requirement for the interacting light beams, which was verified by the solid energy coupling observed while rotating the polarization state of one laser beam. As much as 18.4 mW of the side diffraction mode associated with the light track formed on the slab surface, which sheds some light on the dramatic coupling dynamics. All these findings above were far beyond the reach of conventional PR theory, yet well consistent with the physical picture of 2DEG-supported SPPs and their interactions at the ITO–LN interface, offering a good opportunity to conceive and design future photonic/electronic devices for optical modulators.

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Section: Experiments and Discussionmentioning

confidence: 98%

Polarization and angle dependent subwavelength coupling and dramatic reflection enhancement/reduction from an ITO–LiNbO₃ interface

Wang

Zhao

Wang

et al. 2020

J. Phys. D: Appl. Phys.

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“…In our previous experiments, long-ranged SPPs supported by accumulative 2DEGs with high excitation efficiency and ultra-low propagating loss were reported in both the Y-and Z-cut Fe:LN/ITO systems. [19][20][21] According to ab initio theory, the Y-cut plane of LN is with σ y = 0.23 C m −2 . 1,2) Here σ y is the areal electron density for the Y-planes.…”

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confidence: 99%

Unidirectional scattering of surface plasmon polaritons at the interface of indium-tin-oxide coated Fe-doped LiNbO₃

Wang

Xiong

et al. 2021

Appl. Phys. Express

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We demonstrated, both experimentally and theoretically, surface plasmon polaritons (SPPs) can be unidirectionally scattered at the interface of indium-tin-oxide (ITO) coated iron doped Y-cut lithium niobate (Fe:LiNbO 3 , Fe:LN) slab. The multipole analysis referring to the spontaneous polarization was utilized to introduce an asymmetry to the Fe:LN/ITO system. Furthermore, with strong bulk photovoltaic effect of Fe:LN, the diffusion mechanism of space charge transport brought local and nonlocal responses to the scattering process, leading to the unidirectional scattering of SPPs. This work opens an opportunity in designing ultracompact integrated plasmonic circuits without needs to resort to lossy metals.

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Surface plasmon polaritons enhanced random lasing and weak localization of light in un- and ZnSe-coated Nd3+ doped (Pb,La)(Zr,Ti)O3 ceramics

Xiong

Zhang

et al. 2021

Optical Materials

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Accumulation-layer hybridized surface plasmon polaritions at an ITO/LiNbO₃ interface

Cited by 7 publications

References 25 publications

Polarization and angle dependent subwavelength coupling and dramatic reflection enhancement/reduction from an ITO–LiNbO₃ interface

Polarization and angle dependent subwavelength coupling and dramatic reflection enhancement/reduction from an ITO–LiNbO₃ interface

Unidirectional scattering of surface plasmon polaritons at the interface of indium-tin-oxide coated Fe-doped LiNbO₃

Surface plasmon polaritons enhanced random lasing and weak localization of light in un- and ZnSe-coated Nd3+ doped (Pb,La)(Zr,Ti)O3 ceramics

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Accumulation-layer hybridized surface plasmon polaritions at an ITO/LiNbO3 interface

Cited by 7 publications

References 25 publications

Polarization and angle dependent subwavelength coupling and dramatic reflection enhancement/reduction from an ITO–LiNbO3 interface

Polarization and angle dependent subwavelength coupling and dramatic reflection enhancement/reduction from an ITO–LiNbO3 interface

Unidirectional scattering of surface plasmon polaritons at the interface of indium-tin-oxide coated Fe-doped LiNbO3

Surface plasmon polaritons enhanced random lasing and weak localization of light in un- and ZnSe-coated Nd3+ doped (Pb,La)(Zr,Ti)O3 ceramics

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Product

Resources

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Accumulation-layer hybridized surface plasmon polaritions at an ITO/LiNbO₃ interface

Polarization and angle dependent subwavelength coupling and dramatic reflection enhancement/reduction from an ITO–LiNbO₃ interface

Polarization and angle dependent subwavelength coupling and dramatic reflection enhancement/reduction from an ITO–LiNbO₃ interface

Unidirectional scattering of surface plasmon polaritons at the interface of indium-tin-oxide coated Fe-doped LiNbO₃