Pixel-level plasmonic microcavity infrared photodetector

Jing, Youliang; Li, Zhi Feng; Li, Qian; Chen, Xiao Shuang; Chen, Ping Ping; Wang, Han; Li, Meng Yao; Li, Ning; Lü, Wei

doi:10.1038/srep25849

Cited by 50 publications

(29 citation statements)

References 21 publications

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“…GaAs/AlGaAs QWs are regarded as a promising material for infrared photodetection due to low cost, high uniformity, simple design and growth, and compatibility with material processing . Since QWs are only responsive to light field perpendicular to the GaAs/AlGaAs multiple layers and the efficiency of intersubband transition is fairly low, many photonic structures are proposed to couple the incident light into certain photonic modes for a normal electric field component and an enhanced local intensity . Recently, plasmonic cavities have been found promising to enhance the absorption of QWs, since they could provide normally polarized intensified local modes that overlap well with the QWs.…”

Section: Application To Qwipsmentioning

confidence: 99%

“…Moreover, the deep subwavelength scale and the compatibility to device configuration are also obvious advantages of plasmonic cavities for QWIPs. However, the ohmic loss of plasmonic cavity integrated QWIPs with ultrathin active layers is usually higher than 50% of the in‐coupled power . The serious ohmic loss limits the absorption enhancement of the QWs.…”

Section: Application To Qwipsmentioning

confidence: 99%

“…Plasmonic structures are famous for subwavelength light confinement and localized field enhancement . Based on the superiorities, they have been proposed to enhance light absorption of active materials in small volumes and with low absorptivity . For the optoelectronic devices, if the absorption efficiency could be maintained when reducing the size of active materials, a small active region is always desired because it leads to low dark current, fast response, efficient carrier collection, and low material cost .…”

Section: Introductionmentioning

confidence: 99%

“…In such a way, with the help of plasmonic structures, the optoelectronic devices with small active volumes could still have high absorption and thus the performance would be prominently improved. Among all the plasmonic structures for the purpose, the plasmonic cavities have recently received the most attention because of their efficient light coupling, easily tunable resonance, insensitive angle dependence, and good compatibility with device structures . However, the ohmic loss, as the deadly defect of plasmonic structures, also becomes a big concern in this scenario.…”

Section: Introductionmentioning

confidence: 99%

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Realization of Both High Absorption of Active Materials and Low Ohmic Loss in Plasmonic Cavities

Zuyi

Zhou

et al. 2019

Advanced Optical Materials

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Enhancing active material absorption and suppressing ohmic loss is desired by a lot of applications based on plasmonic structures. In this work, an effective photonic approach is presented to achieve this purpose in plasmonic cavities. Enhancing the absorption ratio of the active material to the metal (by properly increasing the volume of the active region), and meanwhile keeping the system close to a critical coupling status for perfect light trapping (by switching the resonance to a higher‐order one or making real facets as the cavity boundaries) is proposed. As a photonic approach, this is generally applicable to different plasmonic materials. With the help of this approach, the absorption of the quantum wells in a plasmonic‐cavity‐integrated quantum well infrared photodetector operating in the longwave infrared range can be enhanced to 82% of the incident power and the ohmic loss can be suppressed to 18%. For plasmonic‐cavity‐integrated GaAs devices operating in the near infrared range, the approach can enhance the active material absorption to 78% of the incident power and suppress the ohmic loss to 20% at the wavelengths close to the bandgap. Also, it would improve the performance at a more extended wavelength.

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Section: Application To Qwipsmentioning

confidence: 99%

Section: Application To Qwipsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Realization of Both High Absorption of Active Materials and Low Ohmic Loss in Plasmonic Cavities

Zuyi

Zhou

et al. 2019

Advanced Optical Materials

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“…[8][9][10][11][12] SPPs are the collective oscillations of electron plasma in the metallic structure, for example, a metallic hole array, excited by electromagnetic (EM) radiation, [13][14][15][16] which can concentrate light at a subwavelength scale beyond the diffraction limit, thereby significantly enhancing the EM field. [18][19][20] [18][19][20] …”

mentioning

confidence: 99%

Strong Responsivity Enhancement of Quantum Dot‐in‐a‐Well Infrared Photodetectors Using Plasmonic Structures

Fowler

Kim

Lee

et al. 2018

Advcd Theory and Sims

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Detector responsivity enhancement from integrating optimized plasmonic structure layers into quantum dot-in-a-well photodetectors is investigated by a finite integration technique-based simulation. It is found that by including a 0.1 µm thick gold hole-array layer onto a backside illuminated photodetector, the peak detector responsivity is enhanced by nearly a factor of 8. A 0.2 µm thick gold disk-array layer improves the peak responsivity by around 15 instead. The calculated enhancement factors show a good agreement with experimental data by Gu et al. [1] and Lee et al. [2] Simulation method and analytical analysis accomplished in this paper provide a generalized approach to design optimal plasmonic structures integrated to various infrared detecting device configurations.high-temperature operation), [3][4][5] with those of quantum well detectors (better sensitivity and control over operating wavelength), and DWELL detectors are approaching MCTs in terms of responsivity and specificdetectivity [6,7] (although DWELL detectors still exhibit worse performance than MCTs).DWELL detector performance can be enhanced by surface plasmons (SPs) caused by the inclusion of a sub-wavelength metallic hole array (SP polaritons: SPPs) or subwavelength metallic nanoparticles (localized SPs: LSPs). [8][9][10][11][12] SPPs are the collective oscillations of electron plasma in the metallic structure, for example, a metallic hole array, excited by electromagnetic (EM) radiation, [13][14][15][16] which can concentrate light at a subwavelength scale beyond the diffraction limit, thereby significantly enhancing the EM field. LSPs confine SPs in the vicinity of sub-wavelength resonators, for example, metallic disks, which also can significantly enhance the EM field near the surface of the resonators, [17] thereby improving the performance of the photodetectors. [18][19][20]

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Circular Polarization Discrimination Enhanced by Anisotropic Media

Chu

Zhou

Dai

et al. 2020

Advanced Optical Materials

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The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adom.201901800.Circularly polarized light (CPL) has its electric field rotating with a constant magnitude in a plane perpendicular to the direction of the wave. Based on the direction of rotation, a circularly polarized wave is either left-circularly polarized (LCP) or right-circularly polarized (RCP), corresponding to the two spin states of photons. Owing to the superior robustness of circular polarization states during transmission, [1] during asymmetrical interaction with chiral matters, [2] and in the quantum information carried by its photon spin states, [3] circularly polarized light has promising applications in optical communication, [4] imaging, [5] sensing, [6] and quantum information processing. [7][8][9] Adv. Optical

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Pixel-level plasmonic microcavity infrared photodetector

Cited by 50 publications

References 21 publications

Realization of Both High Absorption of Active Materials and Low Ohmic Loss in Plasmonic Cavities

Realization of Both High Absorption of Active Materials and Low Ohmic Loss in Plasmonic Cavities

Strong Responsivity Enhancement of Quantum Dot‐in‐a‐Well Infrared Photodetectors Using Plasmonic Structures

Circular Polarization Discrimination Enhanced by Anisotropic Media

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