Imaging exciton–polariton transport in MoSe2 waveguides

Hu, Fu-Gang; Luan, Yilong; Scott, Marie; Yan, Jiaqiang; Mandrus, David; Xu, Xiaodong; Fei, Zhe

doi:10.1038/nphoton.2017.65

Cited by 223 publications

(293 citation statements)

References 32 publications

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“…A recent study indicated that the wavelength of waveguide modes changes sensitively with the thickness of MoSe 2 (a representative transition‐metal dichalcogenide (TMDC), a semiconductor). However, quite different from the PhPs in hBN as mentioned earlier, this λ p increases sharply with the reduction in sample thickness at 1.48 eV incident light . On the other hand, the edge reflection pattern of the waveguide modes in TMDCs changes sensitively with the frequency of incident light, including the fringe period, intensity, and damping .…”

Section: Short Comments About Exciton Polaritonsmentioning

confidence: 59%

“…However, quite different from the PhPs in hBN as mentioned earlier, this λ p increases sharply with the reduction in sample thickness at 1.48 eV incident light . On the other hand, the edge reflection pattern of the waveguide modes in TMDCs changes sensitively with the frequency of incident light, including the fringe period, intensity, and damping . Surprisingly, the figure of merit of EPs is comparable or even better than that of SPPs and PhPs.…”

Section: Short Comments About Exciton Polaritonsmentioning

confidence: 62%

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Scaling and Reflection Behaviors of Polaritons in Low‐Dimensional Materials

Shen

Luo

Lyu

et al. 2019

Advanced Optical Materials

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Polaritons in low‐dimensional materials have shown their unique capabilities to concentrate light at the deep subwavelength scale. They behave quite differently from those in conventional metals. On the one hand, the strongly confined polaritons exhibit a large tunability in wavelength following different scaling behaviors in different systems. On the other hand, they show novel reflection behaviors when they encounter topographic boundaries or electronic discontinuities. Here, recent progress on the scaling and reflection behaviors of strongly confined polaritons in three representative low‐dimensional material systems is reviewed. It is shown that the polariton wavelength changes sensitively with carrier density, thickness, and the number of conducting channels for graphene, hexagonal boron nitride, and carbon nanotubes. Also, it is demonstrated how polaritons reflect in low‐dimensional materials when encountering edges, corrugations, domain walls, strain regions, etc.

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Section: Short Comments About Exciton Polaritonsmentioning

confidence: 59%

Section: Short Comments About Exciton Polaritonsmentioning

confidence: 62%

Scaling and Reflection Behaviors of Polaritons in Low‐Dimensional Materials

Shen

Luo

Lyu

et al. 2019

Advanced Optical Materials

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“…The pulse duration of mid-IR radiation is typically 40-200 fs, which is sufficient to gain access to timescales where electron-phonon, and electron-spin coupling have not yet brought the electronic system into thermal equilibrium [50]. In the visible range several interesting spectral features such as excitonic modes in transition metal dichalcogenides [61,62], plasmonic modes in metals and topological insulators [63], as well as resonances related to interband transitions in insulators, across charge transfer and Mott-Hubbard gaps can be observed. The pulse duration of visible radiation, which can be in the range of 4-40 fs, also enables indirect access to resonant modes in the infrared spectral range such as coherent phonons and Raman active modes [64,65].…”

Section: Outlook and Conclusionmentioning

confidence: 99%

Artifact free time resolved near-field spectroscopy

et al. 2017

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Abstract:We report on the first implementation of ultrafast near field measurements carried out with the transient pseudoheterodyne detection method (Tr-pHD). This method is well suited for efficient and artifact free pump-probe scattering-type near-field optical microscopy with nanometer scale resolution. The Tr-pHD technique is critically compared to other data acquisition methods and found to offer significant advantages. Experimental evidence for the advantages of Tr-pHD is provided in the near-IR frequency range. Crucial factors involved in achieving proper performance of the Tr-pHD method with pulsed laser sources are analyzed and detailed in this work. We applied this novel method to femtosecond time-resolved and nanometer spatially resolved studies of the photo-induced effects in the insulator-to-metal transition system vanadium dioxide. 5660-5694 (2000). 4. T. Kampfrath, K. Tanaka, and K. A. Nelson, "Resonant and nonresonant control over matter and light by intense terahertz transients," Nat. Photonics 7(9), 680-690 (2013). 5. J. Orenstein, "Ultrafast spectroscopy of quantum materials," Phys. Today 65(9), 44-50 (2012 Express ; 25 (2017 25 ( ), 23. -S. 28589-28611 https://dx.doi.org/10.1364 Cavalleri, "Light-Induced Superconductivity in a Stripe-Ordered Cuprate," Science 331(6014), 189-191 (2011). 12. J. Zhang, X. Tan

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“…Here the FOM is defined as the ratio of polariton propagation length ( L p ) over polariton wavelength (λ p ). The ovals define the upper and lower limits of FOM and energy reported from experimental studies . f) General characteristics and merits of EPs in group VI TMDs.…”

Section: Introductionmentioning

confidence: 99%

Recent Progress on Exciton Polaritons in Layered Transition‐Metal Dichalcogenides

Fei

2019

Advanced Optical Materials

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Exciton polaritons (EPs) are half‐light, half‐matter quasiparticles formed due to the coupling between photons and excitons in semiconductors. Their uniqueness lies at the strong light–matter interactions and long‐distance transport, thus promising for many novel applications in photonics, information, and quantum technologies. Recently, EPs in group‐VI transition‐metal dichalcogenides (TMDs) have attracted a lot of research interest due to their room‐temperature stability, long‐distance propagation, and controllability through electric gating, valley‐selective optical pumping, and precise thickness control. In this progress report, recent studies of EPs in TMDs are reviewed, highlighting their key properties and functionalities, and then discussing the potential directions for future research.

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Imaging exciton–polariton transport in MoSe2 waveguides

Cited by 223 publications

References 32 publications

Scaling and Reflection Behaviors of Polaritons in Low‐Dimensional Materials

Scaling and Reflection Behaviors of Polaritons in Low‐Dimensional Materials

Artifact free time resolved near-field spectroscopy

Recent Progress on Exciton Polaritons in Layered Transition‐Metal Dichalcogenides

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