Infrared Investigation of Lattice Vibration in Black Phosphorus

Terada, S.; Hattori, Tuyoshi; Kobayashi, Michihiro; Akahama, Yuichi; Endo, S.; Narita, Shin‐ichiro

doi:10.1143/jpsj.52.2630

Cited by 16 publications

(6 citation statements)

References 5 publications

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“…Figure 2 shows the absorption spectra for E k c at various pressures and at 300 K. In the spectrum at 0 GPa, a sharp absorption edge is observed at 2280 cm --1 (0.28 eV) and also infrared active phonons between 600 and 900 cm --1 . The results agree with previous ones [2,8,9]. With increasing pressure, the absorption edge shifts to lower energy and reaches 680 cm --1 (0.085 eV) at 1.2 GPa.…”

Section: Resultssupporting

confidence: 92%

Optical and Electrical Studies on Band-Overlapped Metallization of the Narrow-Gap Semiconductor Black Phosphorus with Layered Structure

Akahama

Kawamura

2001

phys. stat. sol. (b)

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Section: Resultssupporting

confidence: 92%

Optical and Electrical Studies on Band-Overlapped Metallization of the Narrow-Gap Semiconductor Black Phosphorus with Layered Structure

Akahama

Kawamura

2001

phys. stat. sol. (b)

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“…The phonon modes possess the symmetry representation of 2A g + B 1g + B 2g + 2B 3g + A u + B 1u + B 2u , where the g (gerade) modes are Raman active and the u (ungerade) modes are infrared active. An exception is found for the A u mode, which is both Raman and infrared inactive [50][51][52]. All infrared active modes lie in energies that are below our measurement spectral window; thus, the fundamental modes cannot be observed.…”

mentioning

confidence: 69%

Oxygen impact on the electronic and vibrational properties of black phosphorus probed by synchrotron infrared nanospectroscopy

et al. 2017

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Black phosphorus (BP), a stable allotrope of phosphorus, is a crystal composed of a stack of atomically thin, two-dimensional (2D) layers, possessing notable potential to be used as a semiconductor in electronic, optoelectronic and photonic nanodevices [1,2]. Its properties stem from its highly anisotropic, orthorhombic, crystalline structure and from the interactions between the atomic layers [3][4][5]. While single-layer BP (also called phosphorene) is a direct bandgap (~2 eV) semiconductor, in few-layer BP interlayer electronic interactions result in thicknessdependent bandgap [6][7][8][9]. Thus, few-layer BP can be properly tailored, by simple mechanical exfoliation, to fit applications in, e.g. nanoscale optoelectronics [5,[10][11][12][13][14][15]. For photonics, BP demonstrates attractive linear and nonlinear optical properties that are related to its ability to support highly bound 2D excitons [16,17] and to its orthorhombic crystallinity, which creates an optical conductivity that is highly dependent on the optical polarization state [5,[18][19][20][21].Despite all its potential, BP is rather sensitive to the chemical environment, which can affect and dete-riorate its interesting properties [22]. Such sensitivity is chiefly related to the BP electronic configuration, wherein P atoms carry a lone electron pair in the sp 3 hybridized orbital which, in the external layers, is in contact with the environment. Accordingly, interfacial interactions primarily take place between this electron pair and different species, such as transition metal ions, hydrogen, nitrogen, oxygen, and water [23][24][25]. Particularly, BP's reaction with molecular oxygen is important because it limits its chemical stability at ambient conditions and directly impacts the electronic states, thus, being deleterious to the performance of . Nevertheless, if oxidation can be controlled, a passivating protective oxide layer can be created on the underlying BP, or phosphorene, sample [29][30][31][32][33]. Such a control, however, requires further characterization and understanding of the oxide formation under differing conditions.Although crucial to BP's effective application, studies on the oxide formation and structure are mostly theoretical [25,[34][35][36][37], with exper-

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“…In the 1980s, optical absorption from this IR active phonon in bulk BP was reported, which has been attributed to the B1u phonon mode. [124][125][126] The polarization-dependent phonon absorption can also be observed in the reflectance spectra (Figure 2g). Figure 2f and 2h show the integrated areas of the Drude response and phonon absorption peak fitted by a typical Drude-Lorentz model.…”

Section: Polarized Absorptionmentioning

confidence: 82%

“…In addition to the Drude absorption, an IR active phonon mode at ≈136 cm −1 can be observed in Figure e, which shows an anisotropic response as well. In the 1980s, optical absorption from this IR active phonon in bulk BP was reported, which has been attributed to the B 1u phonon mode . The polarization‐dependent phonon absorption can also be observed in the reflectance spectra (Figure g).…”

Section: Optical Properties Of Anisotropic 2d Materialsmentioning

confidence: 82%

The Optical Properties and Plasmonics of Anisotropic 2D Materials

Wang

Zhang

Huang

et al. 2019

Advanced Optical Materials

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In the fast growing 2D materials family, anisotropic 2D materials, with their intrinsic in‐plane anisotropy, exhibit a great potential in optoelectronics. One such typical material is black phosphorus (BP), with a layer‐dependent and highly tunable bandgap. Such intrinsic anisotropy adds a new degree of freedom to the excitation, detection, and control of light. Particularly, hyperbolic plasmons with hyperbolic q‐space dispersion are predicted to exist in BP films, where highly directional propagating polaritons with divergent densities of states are hosted. Combined with a tunable electronic structure, such natural hyperbolic surfaces may enable a series of exotic applications in nanophotonics. Herein, the anisotropic optical properties and plasmons (especially hyperbolic plasmons) of BP are discussed. In addition, other possible 2D material candidates (especially anisotropic layered semimetals) for hyperbolic plasmons are examined. This review may stimulate further research interest in anisotropic 2D materials and fully unleash their potential in flatland photonics.

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Infrared Investigation of Lattice Vibration in Black Phosphorus

Cited by 16 publications

References 5 publications

Optical and Electrical Studies on Band-Overlapped Metallization of the Narrow-Gap Semiconductor Black Phosphorus with Layered Structure

Optical and Electrical Studies on Band-Overlapped Metallization of the Narrow-Gap Semiconductor Black Phosphorus with Layered Structure

Oxygen impact on the electronic and vibrational properties of black phosphorus probed by synchrotron infrared nanospectroscopy

The Optical Properties and Plasmonics of Anisotropic 2D Materials

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