Fabrication of UV Photodetector on TiO2/Diamond Film

Liu, Zhangcheng; Li, Fengnan; Li, Shuoye; Hu, Chao; Wang, Wei; Wang, Fei; Lin, Fuchang; Wang, Hongxing

doi:10.1038/srep14420

Cited by 93 publications

(47 citation statements)

References 16 publications

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“…Actually, quantum walks have been experimentally implemented in a variety of quantum systems [10], such as optical resonator [11], nuclear magnetic resonance [12], trapped ions [13], trapped cold neutral atoms [14,15], single photons in bulk [16], fiber optics [17], and coupled waveguide arrays [18]. And on the theoretical side, fundamental effects of quantum statistics [19,20], interactions [20][21][22][23], disorders [24,25], defects [26,27], and hopping modulations [23,[27][28][29] on quantum walks have been intensively investigated. * Electronic address: liwangiphy@sxu.edu.cn…”

Section: Introductionmentioning

confidence: 99%

Quantum walks in the commensurate off-diagonal Aubry-André-Harper model

et al. 2017

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Due to the topological nature of Aubry-André-Harper (AAH) model, exotic edge states have been found existing in one-dimensional periodic and quasiperiodic lattices. In this article, we investigate continuous-time quantum walks of identical particles initially located on either edge of commensurate AAH lattices in detail. It is shown that the quantum walker is delocalized among the whole lattice until the strength of periodic modulation is strong enough. The inverse participation ratios (IPRs) for all of the eigenstates are calculated. It is found that the localization properties of the quantum walker is mainly determined by the IPRs of the topologically protected edge states. More interestingly, the edge states are shown to have an exotic 'repulsion' effect on quantum walkers initiated from the lattice sites inside the bulk. Furthermore, we examine the role of nearest-neighbour interaction on the quantum walks of two identical fermions. Clear enhancement of the 'repulsion' effect by strong interaction has been shown.

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Section: Introductionmentioning

confidence: 99%

Quantum walks in the commensurate off-diagonal Aubry-André-Harper model

et al. 2017

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“…While different approaches can be adopted for this purpose, [ 19 ] the most commonly used structures used for wavelength‐division and mode‐division demultiplexing are diffraction gratings and spatial light modulators (SLMs) enabling steering of different wavelengths and topological charges into distinct directions, respectively. [ 93,94 ]…”

Section: Mode‐wavelength‐division Multiple Accessmentioning

confidence: 99%

Topological Space‐Time Photonic Transitions in Angular‐Momentum‐Biased Metasurfaces

Sedeh

Salary

Mosallaei

2020

Advanced Optical Materials

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In this paper, topological space‐time photonic transition of light in angular‐momentum‐biased metasurfaces is established, which yields a superposition of orbital‐angular‐momentum (OAM)‐carrying beams at distinct frequency harmonics upon scattering whose topological charges and frequency shifts are correlated. A reflective dielectric metasurface is considered that consists of silicon nanodisk heterostructures integrated with indium‐tin‐oxide and gate dielectric layers placed on a back mirror forming a dual‐gated field effect modulator. The metasurface is divided into several azimuthal sections wherein the nanodisk heterostructures are interconnected via biasing lines. Addressing each azimuthal section with radio‐frequency biasing signals separately allows for flexible implementation of different spatiotemporal modulation profiles. Active tuning of OAM states with high mode‐purity is demonstrated, which yields minimal cross‐talk between OAM channels in a mode‐multiplexed communication system. Moreover, the role of spatiotemporal modulation profile on the spectral and spatial diversity of OAM states is explored. It is shown that angular‐momentum‐biased metasurfaces allow opportunities for hybridized mode‐division and wavelength‐division multiple access through multiplexing and multicasting across distinct OAM states and wavelengths. The nonreciprocity of topological space‐time photonic transitions across the temporal frequency domain and Hilbert space of OAM states is also investigated giving rise to distinct twisted light channels in up‐ and down‐links.

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“…Thus, researchers began to develop solar‐blind photodetectors from wide bandgap semiconductors, which have the advantages of high radiation hardness and intrinsic visible/solar blind . In recent years, solar‐blind photodetectors have been developed from some wide bandgap semiconductors, such as AlGaN, ZnMgO, Ga 2 O 3 , and diamond . Among these semiconductors, diamond has a variety of unique characteristics such as wide bandgap (5.47 eV), high thermal conductivity, high breakdown voltage, high carrier mobility, and high radiation hardness, which make it a promising candidate for solar‐blind photodetection.…”

Section: Introductionmentioning

confidence: 99%

Diamond‐Based All‐Carbon Photodetectors for Solar‐Blind Imaging

Lin

Shan

et al. 2018

Advanced Optical Materials

134

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Single‐crystalline diamond wafers are synthesized, and all‐carbon solar‐blind photodetectors are constructed based on the diamond with interdigitated graphite as electrodes. The graphite electrodes are made by laser‐induced graphitization of the diamond. The peak responsivity of the photodetector is 21.8 A W−1, and detectivity is 1.39 × 1012 cm Hz1/2 W−1 when the bias voltage is 50 V, it is noted that both of these are among the best values ever reported for diamond‐based photodetectors. The photodetectors are employed as the sensing pixels in an imaging system, and a clear image is obtained, which is the first report on solar‐blind imaging of diamond photodetectors. The results reported in this paper provide a facile approach to high‐performance diamond solar‐blind photodetectors and their applications in solar‐blind imaging, thus may address a significant step toward the preparation and application of diamond photodetectors.

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Fabrication of UV Photodetector on TiO2/Diamond Film

Cited by 93 publications

References 16 publications

Quantum walks in the commensurate off-diagonal Aubry-André-Harper model

Quantum walks in the commensurate off-diagonal Aubry-André-Harper model

Topological Space‐Time Photonic Transitions in Angular‐Momentum‐Biased Metasurfaces

Diamond‐Based All‐Carbon Photodetectors for Solar‐Blind Imaging

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