Enhanced Photoelectric and Photothermal Responses on Silicon Platform by Plasmonic Absorber and Omni‐Schottky Junction

Wen, Long; Chen, Yifu; Liu, Wanwan; Su, Qiang; Grant, James P.; Qi, Zhiyang; Wang, Qilong; Chen, Qin

doi:10.1002/lpor.201700059

Cited by 66 publications

(73 citation statements)

References 51 publications

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“…Metallic nanoparticles have been used in hot electron photodetectors as well. [ 187,291,294–296 ] The patterned ZnO‐based MSM‐PD with the incorporation of Au nanoparticles also responded to light in the 450–600 nm visible range, out of the ZnO detectable range. [ 257 ] This high response in the visible range was attributed to the excitation of SPPs with the presence of Au nanoparticles, injecting the hot electron from Au structures into the ZnO film, as shown in Figure 13c.…”

Section: Improving the Performances Of Msm‐pdsmentioning

confidence: 99%

Status and Outlook of Metal–Inorganic Semiconductor–Metal Photodetectors

Shi

Chen

Zhai

et al. 2020

Laser & Photonics Reviews

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Metal–inorganic semiconductor–metal photodetectors (MSM‐PDs) have received great attention in many areas, such as optical fiber communication, sensing, missile guidance, etc., due to their inherent merits of high speed, high sensitivity, and easy integration. This review focuses on MSM‐PDs with the semiconductor layer made of inorganic materials including traditional semiconductors (such as GaAs and Si), the third‐generation wide bandgap semiconductors (such as GaN, ZnO, and SiC), as well as several emerging semiconductors (such as perovskites and 2D materials). First, the basic structures of MSM‐PDs, including the planar and vertical configurations, are presented. Then, their working principles of MSM‐PDs are discussed. Subsequently, the research progresses on MSM‐PDs consisting of different photosensitive semiconductor materials are described in detail. Additionally, the efforts to optimize MSM‐PDs from the aspects of dark current, response speed, responsivity, spectral adjustment, etc., are also introduced. Finally, the review is concluded with the perspectives of MSM‐PDs from the authors’ vision.

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Section: Improving the Performances Of Msm‐pdsmentioning

confidence: 99%

Status and Outlook of Metal–Inorganic Semiconductor–Metal Photodetectors

Shi

Chen

Zhai

et al. 2020

Laser & Photonics Reviews

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“…The MAIM sensor is known to have a large IFR of 66% due to the outstanding light‐trapping effect, which has been widely used in nanophotonic devices . The GWIM sensor is known to have a large Q over 570 at 785 nm .…”

Section: Reflective Gswim Sensorsmentioning

confidence: 99%

Unity Integration of Grating Slot Waveguide and Microfluid for Terahertz Sensing

Wen

et al. 2018

Laser & Photonics Reviews

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Refractive index sensing is attracting extensive interest. Limited by the weak light–matter interaction and the broad bandwidth of resonance, the figure of merit (FoM) of terahertz (THz) sensors is much lower than their counterparts in visible and infrared regions. Here, these two issues are addressed by incorporating a microfluidic channel as a slot layer into a grating slot waveguide (GSW), where guided‐mode resonance results in a narrowband resonant peak and the sensitivity increases remarkably due to the greatly concentrated electromagnetic fields in the slot layer. Both reflective and transmissive sensors are developed with the calculated quality (Q) factors two orders of magnitude larger than metamaterial and plasmonic sensors, and the sensitivities one order of magnitude larger than grating waveguide sensors, contributing to a record high FoM of 692. The measured results match well with the simulations considering the fabrication errors, where the degeneration of narrowband transmission peaks in experiments is attributed to the error of the microfluidic channel height and the divergence of the incident beam. The proposed unity‐integrating configuration with simultaneous optimizations of the resonance mechanism, and the spatial overlap between the sensing field and the analytes shows the potential for high sensitivity bio and chemo sensing.

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“…Strong electromagnetic resonance can greatly enhance the absorption of photons by electrons and benefit hot-electron photodetection [32]. A great number of hot-electron photodetections and devices have been realized in various plasmonic nanostructures and metamaterials, which efficiently convert photon into electron [33][34][35][36][37][38][39][40][41][42][43][44]. Hot-electron photodetection can be tuned in graphene-silicon Schottky junctions where the junction bias can modulate the Schottky junction [45][46][47].…”

Section: Introductionmentioning

confidence: 99%

Phase-coupled simultaneous coherent perfect absorption and controllable hot-electron photodetection in Schottky junction metamaterial

Bai

2020

Nanophotonics

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We report a new type of coherent perfect absorption that is determined by the phase coupling between metaatoms and is referred to as the phase-coupled simultaneous coherent perfect absorption (PC-SCPA) for antisymmetric and symmetric incidences and especially the PC-SCPA for antisymmetric and symmetric incidences can be simultaneously achieved in the same bi-layered Schottky junction metamaterial possessing the phase coupling. Our proposed mechanism exploits the phase coupling between metaatoms, which is in contrast with the existing mechanism which depends on the near-field coupling. The theory of PC-SCPA is provided using coupled mode theory with the phase coupling. The operating wavelengths of PC-SCPA are insensitive to the variations of the spacing distances between metaatoms in the lateral and vertical directions. An infrared PC-SCPA-based hot-electron photodetection with dynamically switchable operating wavelengths and dynamically tunable bandwidth is theoretically and numerically verified in the same bi-layered Schottky junction metamaterial. The peak of spectrum of responsivity for antisymmetric and symmetric incidences can be switched to the same wavelength only by altering the phase coupling. Our study may build the bridge among the new type of PC-SCPA, metamaterial, and hot electron and may find potential and significant applications in hot-electron photodetection.

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Enhanced Photoelectric and Photothermal Responses on Silicon Platform by Plasmonic Absorber and Omni‐Schottky Junction

Cited by 66 publications

References 51 publications

Status and Outlook of Metal–Inorganic Semiconductor–Metal Photodetectors

Status and Outlook of Metal–Inorganic Semiconductor–Metal Photodetectors

Unity Integration of Grating Slot Waveguide and Microfluid for Terahertz Sensing

Phase-coupled simultaneous coherent perfect absorption and controllable hot-electron photodetection in Schottky junction metamaterial

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