Weak light characteristics of a new photoelectric sensor with potential biosensor application

Ding, Lin; Wang, M. J.; Li, Y. Q.; Liu, X. Y.; Shen, Jian; Guo, Fangmin

doi:10.1109/nems.2013.6559947

Cited by 4 publications

(2 citation statements)

References 9 publications

(6 reference statements)

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“…3 a shows an LCD screen, a micro controller unit (MCU) and another processing unit in three layers. This layered configuration decreased the size of the data processing unit to 9.6 × 6.3 × 3.5 cm, only half the size of a previous planar layout of our data processing unit [15].…”

Section: Experiments and Discussionmentioning

confidence: 99%

Weak light characteristics of potential biosensor unit

Ding

Liu

et al. 2013

Micro & Nano Letters

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The design and development of a field deployable biosensor unit based on InAs quantum dots and a InGaAs quantum well hybrid structure is reported. The detection sensitivity of the sensor unit and in particular the weak light detection ability have been tested and analysed in detail. With a custom-made circuit for signal readout and a data processing unit equipped with an LCD screen for data display, the sensor unit can be used in a centrally managed real-time monitoring system such as for infectious disease management and bio-aerosol monitoring. The high sensitivity of this sensor unit makes it a promising choice for the identification of bio-samples.

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Section: Experiments and Discussionmentioning

confidence: 99%

Weak light characteristics of potential biosensor unit

Ding

Liu

et al. 2013

Micro & Nano Letters

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“…Studies have shown that with a layer of QDs of resonant tunnelling diodes and field-effect transistors it is possible to detect single photon at a temperature of 77 k [1][2][3][4]. The detectors were used for sensing the electrostatic potential of the individual photo-induced carriers that were trapped in the QDs.…”

mentioning

confidence: 99%

Micro‐spectrometer based on 64‐pixel high‐sensitivity quantum dot detector array

Zhang

Wang

Jin

et al. 2015

Micro & Nano Letters

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A high photoexcited carrier multiplication photodetector operating at room temperature is reported. The device is a GaAs n-in photodetector with double-barrier AlAs in which a thin quantum well contains a mixture of quantum dot (QD) structures. This special structure makes the proposed photoelectric detector have high sensitivity to light under an operating temperature of 300 k. Its current responsivity can reach about 7 × 10 11 A/W with 0.01 picowatts 633 nm light power and −0.5 V bias. The response voltage is 7 mV at an integration time of 80 μs. The voltage responsivity reached about 2.7 × 10 9 V/W. An embedded micro-spectrometer based on the high-sensitivity features of the photodetector has also been designed. By means of QD fluorescent sample testing and comparison, the proposed spectrometer is found to have higher sensitivity and a shorter integration time than the 'NOVA' spectrometer (product model of the spectrometer of ideaoptics, China) based on a backside-illuminated CCD (Hamamatsu, S7031-1006S). The QD spectrometer was mounded in a hyperspectral microscopy imaging system with an optical path switcher. The system has been used to analyse and to make a comparative study of the biological section. This kind of spectrometer with highly sensitive linear QD detectors has good application prospects in the fields of biological science, medical diagnosis and environmental detection.

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