Infrared photodetectors

When equation 12 is vaUd, the detector is said to be a background-limited infrared photodetector (BLIP). When this is the case, attempts often are made to improve D by cold shielding which reduces ( ). The ideal D is shown in Figure 3 as a function of wavelength with background photon flux as a parameter. The line of termination in the lower left corner represents TN values for a 180° (27T) detector field of view, 300 K ambient background... 

AlGaAs quantum well infrared photodetector (QWIP) focal planes have achieved sufficient sensitivity out to 10-p.m wavelength to result in scene temperature sensitivity of ca 0.2°C when the focal plane is cooled to 77 K. Spectral sensitivity is shown in Eigure 9c and array information is given in Table 1. The supedattice, a newer tool for achieving controlled activation energy, should present many alternative infrared detection techniques. 

Eig. 13. Absorption between confined energy levels in a quantum well infrared photodetector (QWIP). The energy difference between the... 

W.L. Eiseman, J.D. Merriam, and R.F. Potter, Operational Characteristics of Infrared Photodetectors... 

Sivco, and Alfred Y. Cho, Quantum Interference Effects in Intersubband Transitions H. C. Liu, Quantum Well Infrared Photodetector Physics and Novel Devices S. D. Gunapala and S. V. Bandara, Quantum Well Infrared Photodetector (QWIP) Focal Plane Arrays... 

The Sii., Gev/Si quantum well can be prepared by People et al. (52) or Kruek et al. (53). Their products can be applied to the quantum well infrared photodetectors. Similar intraband absorption in the mid-infrared can be achieved by the self-assembled InAs/GaAs as well (54,55). 

Fig. 13. Absorption between confined energy levels in a quantum well infrared photodetector (QWIP). The energy difference (E —E ) between the confined energy levels in a quantum well may be designed such that it is resonant with ir radiation. The band gap, E is much greater, therefore direct band...

Corcoran. E. Body Heat Quantum Well Infrared Photodetector s, Sci. Amer.. 123 (October 1991). 

W. L. Eiseman, J. D. Merriam, and R. F. Potter, Operational Characteristics of Infrared Photodetectors P. R. Bratt, Impurity Germanium and Silicon Infrared Detectors E. H. Putley, InSb Submillimeter Photoconductive Detectors... 

S. D. Gunapala and S. V. Bandara, Quantum Well Infrared Photodetector (QWIP) Focal Plane Arrays... 

In this context it is noted that Kildal [2] proposed the energy spectrum of the conduction electrons in non-linear optical materials under the assumptions of isotropic momentum matrix element and isotropic spin-orbit splitting, respectively, although the anisotropies of the aforementioned band parameters are the significant physical features of this compound. Besides, III-V optoelectronic compounds find extensive application in distributed feedback lasers and infrared photodetectors. In what follows, we study the photoemission in quantum confined CdGeAs2 on the basis of a newly formulated electron... 

F. Levine Quantum-well infrared photodetectors, 3.76 J. Appl. Phys. 74, R1-81 (1993)... 

Infrared photodetector array horizontal activity Elevated Nathanson et al., 1979... 

There are a number of parameters quoted in literature as figures of merit of infrared photodetectors. The use of these parameters is dependent on a certain degree on the particular type of the detector. 

Figure 1.9 shows a general infrared photodetector, which utilizes aU of the above enhancement methods. The general IR detector includes... 

The existence of designer SPP is extremely important for infrared photodetectors. One is able to fabricate any desired plasmonic structure and to tune it for the targeted wavelength range. As an example, infrared detectors enhanced by designer plasmon structures tuned to the range of 8-10 pm have been reported [311]. 

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