A low cost multi quantum SiGe/Si/Schottky structure for high performance IR detectors

Kolahdouz, Mohammadreza; Östling, Mikael; Radamson, Henry H.

doi:10.1109/essderc.2011.6044168

Cited by 2 publications

(1 citation statement)

References 9 publications

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“…Q UANTUM dot (QD) photodetector technology is an interesting field for researchers that develops optoelectronic devices with improved performance for applications, such as data storage, combustion control, flame sensors, ultraviolet (UV) radiation dosimeters, and thermal detectors for IR and imaging with terahertz radiation [1]- [6]. The usefulness and applications of QD-based technologies continue to expand.…”

Section: Introductionmentioning

confidence: 99%

A New Proposal for Simultaneous Multicolor Detection Based on Quantum Dots and Selective Energy Contacts

Heidarzadeh

Rostami

Dolatyari

et al. 2015

IEEE Trans. Electron Devices

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In this paper, simultaneous multiwavelength detection using quantum dots (QDs) and energy selective contacts is investigated. This detection can be achieved by intersubband and interband transitions in QD-based superlattices. Here, we show that attaching a double-barrier resonant tunneling to the QD-based active layer solves the basic problem of carrier extraction from each discrete energy level to individual electrodes (as a multicontact package). The mini-band energy levels and corresponding wave functions for arrays of QDs are calculated using the 2-D Schrodinger equation. We present simultaneous multiwavelength detection by QD structures with selective contacts for the first time according to the best of our knowledge. This paper opens the way to new strategies in the engineering and the fabrication of simple detectors for multiband radiation detection. In addition, for more clarification, photocurrent and dark current of photodetector with two independent output paths are obtained. Index Terms-Energy selective contacts (ESCs), multicolor detector, quantum dots (QDs).

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Section: Introductionmentioning

confidence: 99%

A New Proposal for Simultaneous Multicolor Detection Based on Quantum Dots and Selective Energy Contacts

Heidarzadeh

Rostami

Dolatyari

et al. 2015

IEEE Trans. Electron Devices

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SiGe/Si Multi-Quantum-Well Micro-Bolometer Array Design and Fabrication with Heterogeneous Integration

Zhong

Chen³

et al. 2021

Micromachines

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The micro-bolometer is important in the field of infrared imaging, although improvements in its performance have been limited by traditional materials. SiGe/Si multi-quantum-well materials (SiGe/Si MQWs) are novelty thermal-sensitive materials with a significantly high TCR and a comparably low 1/f noise. The application of such high-performance monocrystalline films in a micro-bolometer has been limited by film integration technology. This paper reports a SiGe/Si MQWs micro-bolometer fabrication with heterogeneous integration. The integration with the SiGe/Si MQWs handle wafer and dummy read-out circuit wafer was achieved based on adhesive wafer bonding. The SiGe/Si MQWs infrared-absorption structure and thermal bridge were calculated and designed. The SiGe/Si MQWs wafer and a 320 × 240 micro-bolometer array of 40 µm pitch L-type pixels were fabricated. The test results for the average absorption efficiency were more than 90% at the wavelength of 8–14 µm. The test pixel was measured to have a thermal capacity of 1.043 × 10−9 J/K, a thermal conductivity of 1.645 × 10−7 W/K, and a thermal time constant of 7.25 ms. Furthermore, the total TCR value of the text pixel was measured as 2.91%/K with a bias voltage of 0.3 V. The SiGe/Si MQWs micro-bolometer can be widely applied in commercial fields, especially in early medical diagnosis and biological detection.

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A low cost multi quantum SiGe/Si/Schottky structure for high performance IR detectors

Cited by 2 publications

References 9 publications

A New Proposal for Simultaneous Multicolor Detection Based on Quantum Dots and Selective Energy Contacts

A New Proposal for Simultaneous Multicolor Detection Based on Quantum Dots and Selective Energy Contacts

SiGe/Si Multi-Quantum-Well Micro-Bolometer Array Design and Fabrication with Heterogeneous Integration

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