Recent Progress in Quantum Well Infrared Photodetectors

Levine, B. F.

doi:10.1007/978-1-4615-3346-7_4

Cited by 10 publications

(6 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Understanding of the transport physics has been clarified by extending the operating wavelengths of the QWPS both to significantly longer wavelengths (1. = 15 pm [44] and 19 pm [2,451) and to shorter wavelengths (1 = 2.7 pm [46] and 4 pm [47,48]), as well as by using new materials (InGaAsDnP [49] and InGaAsP/lnP [46,501). Recently, in addition to the usual n-doped detectors, intersubband absorption in p-doped GaAs/AI,Ga, -,As [Sl], and InGaAsP/InP [46] QWIPS have been demonstrated.…”

Section: Introductionmentioning

confidence: 99%

Device physics of quantum well infrared photodetectors

Levine

1993

Semicond. Sci. Technol.

View full text Add to dashboard Cite

We present a detailed study of a wide variety of quantum well infrared photodetectors, which were chosen to have large differences in their optical and transport properties. Intersubband transitions based on photoexcitation from bound-to-bound, bound-to-quasicontinuum and bound-to-continuum quantum well states were investigated. The measurements and theoretical analysis included optical absorption, responslvity, dark current, current n,oise, optical gain, hot-carrier mean free path, net quantum efficiency, quantum well escape probability, quantum well escape time, as well as detectivity.

show abstract

Section: Introductionmentioning

confidence: 99%

Device physics of quantum well infrared photodetectors

Levine

1993

Semicond. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…If we know the dielectric function of the superlattice εSL (ω) as a whole we can calculate the compositional profile of a real superlattice. This can be done using equation (1). Comparing the dielectric functions of the superlattice with that of the bulk (CdHg)Te alloys obtained by us earlier [14] it was possible to determine which compositions of the alloy are present in the superlattice under investigation.…”

Section: Model and Assumptionsmentioning

confidence: 99%

“…Recently, high performance infrared (IR) detectors based on intersubband absorption in semiconductor superlattices have been demonstrated [1]. Molecular-beam epitaxy (MBE) allows the exact adjustment of the most important device parameters.…”

Section: Introductionmentioning

confidence: 99%

Vibrational infrared spectroscopy of HgTe - CdTe superlattices

Kozyrev

Vodop’yanov

1999

Semicond. Sci. Technol.

View full text Add to dashboard Cite

The current interest in HgTe-CdTe superlattices stems from their usefulness in advanced IR detectors, but for such applications it is necessary to have structures of high performance excluding atomic diffusion in neighbouring layers. Lattice vibration infrared (IR) spectroscopy is a good tool for checking the structural perfection of the superlattices. Analysis of the lattice vibration reflectivity spectra of Hg 1−x Cd x Te alloys was used to obtain the concentration dependences of the oscillator strengths of the Hg-Te vibrations. A comparison with the oscillator strengths of the HgTe-CdTe superlattices deduced from their IR spectra was made. This permitted us to determine the composition and structural perfection of the layers and of the interfaces. The possibility in principle of growing HgTe-CdTe superlattices of high performance with abrupt layers and no traces of alloy in the interface was demonstrated.

show abstract

“…Besides QCLs, a number of optical devices based on the intersubband transitions and operating in the IR and far IR parts of the spectrum exist already, notably quantum well infrared photodetectors (QWIPs) (for reviews see e.g. [8,9,23]). Part of the QCL optimization amounts to limiting as much as possible the losses, notably for THz emitting QCLs.…”

Section: Introductionmentioning

confidence: 99%