Noise, Gain, and Responsivity in Low-Strain Quantum Dot Infrared Photodetectors With up to 80 Dot-in-a-Well Periods

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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“…Dark current measurements were undertaken on both QDIPs at temperatures from 20K to 290K as reported in other work [12], [13]. Fig.…”

Section: Quantum Dot Infrared Photodetectorsmentioning

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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“…The noise is an important property of the quantum dot infrared photodetector which is the infrared photodetector based on quantum dot nanostructure, it can bring about the reducing in the performance of the photodetector, thus it has attracted extensive attention [1][2][3]. Based on the foundation contribution of the dark current to the noise, the noise is strongly related to the dark current.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Quantum Dot Infrared Photodetectors Based on Noise Model

Liu

Zhang²,

Meng³

et al. 2014

AMM

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As an important property of the quantum dot infrared photodetector, the noise has attracted extensive attention. In this paper, the model for the noise of the QDIP is built. This model takes the total electron transport and the dependence of the drift velocity of electrons on the electric field into account. The corresponding calculated results not only show a good agreement with the published results, but also illustrate the dependence of the noise on the structure which can provide us with a method used to optimize the structure of the detector devices.

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Spectral response, dark current, and noise analyses in resonant tunneling quantum dot infrared photodetectors

et al. 2016

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Reduction of dark current at high-temperature operation is a great challenge in conventional quantum dot infrared photodetectors, as the rate of thermal excitations resulting in the dark current increases exponentially with temperature. A resonant tunneling barrier is the best candidate for suppression of dark current, enhancement in signal-to-noise ratio, and selective extraction of different wavelength response. In this paper, we use a physical model developed by the authors recently to design a proper resonant tunneling barrier for quantum infrared photodetectors and to study and analyze the spectral response of these devices. The calculated transmission coefficient of electrons by this model and its dependency on bias voltage are in agreement with experimental results. Furthermore, based on the calculated transmission coefficient, the dark current of a quantum dot infrared photodetector with a resonant tunneling barrier is calculated and compared with the experimental data. The validity of our model is proven through this comparison. Theoretical dark current by our model shows better agreement with the experimental data and is more accurate than the previously developed model. Moreover, noise in the device is calculated. Finally, the effect of different parameters, such as temperature, size of quantum dots, and bias voltage, on the performance of the device is simulated and studied.

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Noise, Gain, and Responsivity in Low-Strain Quantum Dot Infrared Photodetectors With up to 80 Dot-in-a-Well Periods

Cited by 5 publications

References 34 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

Optimization of Quantum Dot Infrared Photodetectors Based on Noise Model

Spectral response, dark current, and noise analyses in resonant tunneling quantum dot infrared photodetectors

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