2003
DOI: 10.1063/1.1540240
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In 0.6 Ga 0.4 As/GaAs quantum-dot infrared photodetector with operating temperature up to 260 K

Abstract: A high-sensitivity In 0.6 Ga 0.4 As/GaAs quantum-dot infrared photodetector ͑QDIP͒ with detection wave band in 6.7-11.5 m and operating temperature up to 260 K under normal incident illumination has been demonstrated. The peak detection wavelength shifts from 7.6 to 8.4 m when the temperature rises from 40 to 260 K. The background limited performance ͑BLIP͒ detectivity (D BLIP * ) measured at V b ϭϪ2.0 V, Tϭ77 K, and p ϭ7.6 m was found to be 1.1 ϫ10 10 cm Hz 1/2 /W, with a corresponding responsivity of 0.22 A/… Show more

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Cited by 133 publications
(70 citation statements)
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“…Although optical excitation of electrons from the IB to the CB is still possible, it occurs with a low probability, since most of them are thermally excited to the CB. That is the reason why quantum-dot infrared photodetectors (QDIPs) need to work at LT [55], [56], 260 K being the highest temperature at which infrared directivity has been reported in an In(Ga)As/GaAs QDIP without high bandgap blocking barriers [57]. It is therefore remarkable that the InAs/GaNAs-based IBSC prototype reported in [52] exhibits TPPC at RT.…”
Section: ) Subbandgap Spectral Response or Quantum Efficiencymentioning
confidence: 99%
“…Although optical excitation of electrons from the IB to the CB is still possible, it occurs with a low probability, since most of them are thermally excited to the CB. That is the reason why quantum-dot infrared photodetectors (QDIPs) need to work at LT [55], [56], 260 K being the highest temperature at which infrared directivity has been reported in an In(Ga)As/GaAs QDIP without high bandgap blocking barriers [57]. It is therefore remarkable that the InAs/GaNAs-based IBSC prototype reported in [52] exhibits TPPC at RT.…”
Section: ) Subbandgap Spectral Response or Quantum Efficiencymentioning
confidence: 99%
“…It can offer low-cost MWIR and LWIR photodetectors and focal plane arrays (FPAs) with simplified fabrication processes and high yield. Detailed QDIP performance, such as photoconductive gains, noise, photoresponsivity and photodetectivity can be found in literature [20][21][22][23][24][25][26][27].…”
Section: Nanoplasmonics -Fundamentals and Applicationsmentioning
confidence: 99%
“…On the other hand, in the last few years, IIInitrides devices based on ISB transitions in QDs are potentially interesting especially for quantum-dot infrared photodetectors (QDIPs). The advantages of QDIPs, can mainly categorize in three parts [54]: (a) the 3D quantum confinement of the carriers, which results in the δ-function-like density of states, and high sensitivity to the normal incident radiation without the use of a grating or corrugations as is often done in QWIPs [55][56][57], (b) reduced electron-phonon scattering, which elongates the carrier lifetime, and high current gain [58][59][60], (c) high-temperature operations [61,62].…”
Section: Qd Infrared Photodetectorsmentioning
confidence: 99%