High-responsivity, normal-incidence long-wave infrared (λ∼7.2 μm) InAs/In0.15Ga0.85As dots-in-a-well detector

Raghavan, S.; Rotella, P.; Stintz, A.; Fuchs, B.; Krishna, S.; Morath, Christian P.; Cardimona, D. A.; Kennerly, Stephen W.

doi:10.1063/1.1498009

Cited by 145 publications

(101 citation statements)

References 17 publications

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“…However the wavelength range covered is usually small and hence is not ideal for the system described above, although in principle different quantum well designs can be adopted to yield the desired spectral characteristics. By incorporating M quantum dots in the quantum wells, dot-in-a-well (DWELL) quantum dot infrared photodetectors (QDIPs) can be designed to exhibit a spectral response that can be tuned across a wide wavelength range [8], [9], as well as providing normal incidence detection. The spectral response of these detectors will vary as a function of the bias voltage applied across the detector allowing one QDIP to effectively act as several separate detectors with differing spectral responses.…”

Section: Introductionmentioning

confidence: 99%

Versatile Spectral Imaging With an Algorithm-Based Spectrometer Using Highly Tuneable Quantum Dot Infrared Photodetectors

Vines

Tan

David

et al. 2011

IEEE J. Quantum Electron.

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reconstructing the spectral shape of materials in the MWIR and LWIR wavelengths using only experimental photocurrent measurements from quantum dot infrared photodetectors (QDIPs). The algorithm theory and implementation will be described, followed by an investigation into this algorithmic spectrometer's performance. Compared to the QDIPs utilized in an earlier implementation, the QDIPs used have highly varying spectral shapes and four spectral peaks across the MWIR and LWIR wavelengths. It has been found that the spectrometer is capable of reconstructing broad spectral features of a range of band pass infrared filters between wavelengths of 4µm and 12µm as well as identifying absorption features as narrow as 0.3µm in the IR spectrum of a polyethylene sheet.Index Terms-Algorithmic spectrometer, hyperspectral imaging, multispectral imaging, quantum dot infrared photodetectors.

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Section: Introductionmentioning

confidence: 99%

Versatile Spectral Imaging With an Algorithm-Based Spectrometer Using Highly Tuneable Quantum Dot Infrared Photodetectors

Vines

Tan

David

et al. 2011

IEEE J. Quantum Electron.

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“…InAs/In 0.15 Ga 0.85 As DWELL systems have been successful in detecting LWIR light [16]. QDIPs using DWELLs not only permit greater control over detection wavelength tunability [87], but they have also demonstrated excellent device performance [88].…”

Section: Qdip Bandstructure Engineeringmentioning

confidence: 99%

Quantum-dot infrared photodetectors: a review

Stiff‐Roberts

2009

J. Nanophoton

100

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Abstract. Quantum-dot infrared photodetectors (QDIPs) are positioned to become an important technology in the field of infrared (IR) detection, particularly for high-temperature, low-cost, high-yield detector arrays required for military applications. High-operating temperature (≥150 K) photodetectors reduce the cost of IR imaging systems by enabling cryogenic dewars and Stirling cooling systems to be replaced by thermo-electric coolers. QDIPs are well-suited for detecting mid-IR light at elevated temperatures, an application that could prove to be the next commercial market for quantum dots. While quantum dot epitaxial growth and intraband absorption of IR radiation are well established, quantum dot nonuniformity remains as a significant challenge. Nonetheless, state-of-the-art mid-IR detection at 150 K has been demonstrated using 70-layer InAs/GaAs QDIPs, and QDIP focal plane arrays are approaching performance comparable to HgCdTe at 77 K. By addressing critical challenges inherent to epitaxial QD material systems (e.g., controlling dopant incorporation), exploring alternative QD systems (e.g., colloidal QDs), and using bandgap engineering to reduce dark current and enhance multi-spectral detection (e.g. resonant tunneling QDIPs), the performance and applicability of QDIPs will continue to improve.Keywords: InAs/GaAs quantum dots, colloidal quantum dots, quantum-dot infrared photodetectors, QDIP focal plane arrays.

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“…Later on QDIPs with QW active regions, known as DWELL structures, were proposed to improve the detection wavelength tunability with InGaAs strain relief layers [79,80]. Surprisingly, DWELL IRPDs turned out to have advantages such as enhancement of absorption, low dark current, and high responsivity [81][82][83]. DWELL IRPDs have been extensively explored by Krishna's research group, and some of the main achievements are presented in their review articles [84].…”

Section: Qdip Based On Iii-v Materialsmentioning

confidence: 99%

Emerging technologies for high performance infrared detectors

2017

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Infrared photodetectors (IRPDs) have become important devices in various applications such as night vision, military missile tracking, medical imaging, industry defect imaging, environmental sensing, and exoplanet exploration. Mature semiconductor technologies such as mercury cadmium telluride and III-V material-based photodetectors have been dominating the industry. However, in the last few decades, significant funding and research has been focused to improve the performance of IRPDs such as lowering the fabrication cost, simplifying the fabrication processes, increasing the production yield, and increasing the operating temperature by making use of advances in nanofabrication and nanotechnology. We will first review the nanomaterial with suitable electronic and mechanical properties, such as two-dimensional material, graphene, transition metal dichalcogenides, and metal oxides. We compare these with more traditional lowdimensional material such as quantum well, quantum dot, quantum dot in well, semiconductor superlattice, nanowires, nanotube, and colloid quantum dot. We will also review the nanostructures used for enhanced lightmatter interaction to boost the IRPD sensitivity. These include nanostructured antireflection coatings, optical antennas, plasmonic, and metamaterials.

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High-responsivity, normal-incidence long-wave infrared (λ∼7.2 μm) InAs/In0.15Ga0.85As dots-in-a-well detector

Cited by 145 publications

References 17 publications

Versatile Spectral Imaging With an Algorithm-Based Spectrometer Using Highly Tuneable Quantum Dot Infrared Photodetectors

Versatile Spectral Imaging With an Algorithm-Based Spectrometer Using Highly Tuneable Quantum Dot Infrared Photodetectors

Quantum-dot infrared photodetectors: a review

Emerging technologies for high performance infrared detectors

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