Development of mid-wavelength and long-wavelength megapixel portable QWIP imaging cameras

Gunapala, Sarath D.; Bandara, S. V.; Liu, J.K.; Hill, Cory J.; Rafol, Sir B.; Mumolo, Jason M.; Trinh, J.; Tidrow, Meimei Z.; LeVan, Paul D.

doi:10.1016/j.infrared.2005.02.012

Cited by 15 publications

(6 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Today, QWIP focal plane array (FPA) cameras sensitive at wavelengths between 8 and 10 m have reached commercial maturity and are used in military, security, surveillance, and medical applications. As an example, Gunapala et al [5] presented a high-performance 1024 1024 pixel dual-band QWIP FPA based on GaAs-AlGaAs with cutoff wavelengths of 5.1 and 8.4 m.…”

Section: Introductionmentioning

confidence: 99%

Quantum Cascade Detectors

Giorgetta

Baumann

Graf

et al. 2009

IEEE J. Quantum Electron.

196

126

View full text Add to dashboard Cite

Abstract-This paper gives an overview on the design, fabrication, and characterization of quantum cascade detectors. They are tailorable infrared photodetectors based on intersubband transitions in semiconductor quantum wells that do not require an external bias voltage due to their asymmetric conduction band profile. They thus profit from favorable noise behavior, reduced thermal load, and simpler readout circuits. This was demonstrated at wavelengths from the near infrared at 2 m to THz radiation at 87 m using different semiconductor material systems. In the NIR, fast intraband semiconductor photodetectors are only available for wavelengths up to about 1.6 m. On the other tail of optical frequencies, namely for detection of THz radiation, bolometers are widely used; however, they are not well suited for high-speed applications. For fast light detection at wavelengths above 1.6 m, ISB photodetectors are very promising candidates. As unipolar devices, their fundamental F. R. Giorgetta was with the University of Neuchatel, 2000 Neuchatel, Switzerland. He is now with the National

show abstract

Section: Introductionmentioning

confidence: 99%

Quantum Cascade Detectors

Giorgetta

Baumann

Graf

et al. 2009

IEEE J. Quantum Electron.

196

126

View full text Add to dashboard Cite

show abstract

“…Another alternative to direct band-gap detectors is the intersubband transitions in quantum-confined heterostructures using III-V technology. The advantage of this quantum well infrared photodetector (QWIP) [3][4][5][6][7][8][9] approach is the availability of a mature III-V fabrication technology and multi-spectral capability. These heterostructures have a narrow absorption spectrum that can be tuned by varying the quantum well width and barrier layer compositions.…”

Section: Introductionmentioning

confidence: 99%

“…There is a large range of material combinations available allowing the tailoring of band-gaps through stacking of thin layers. For instance, the InAs/GaSb superlattices for advanced infrared focal plane arrays [6], a microscopic model of QWIP [7], multi-band and broad-band infrared detectors based on III-V materials for spectral imaging instruments [8] and the mid-and long-wavelength megapixel portable QWIP imaging cameras [9] were developed and investigated.…”

Section: Introductionmentioning

confidence: 99%

Photovoltaic and optoelectronic properties of InAs(100)-based photoconductive cells with quantum dots and nanopits

Gambaryan

Aroutiounian

Harutyunyan

2011

Infrared Physics & Technology

View full text Add to dashboard Cite

“…Nowadays, state-ofthe-art QWIP-based focal plane arrays sensitive at wavelengths between 8 µm and 10 µm have reached commercial maturity. As a particularly advanced example of such an infrared camera, Gunapala et al presented a high performance 1024 x 1024 pixel dual band focal plane array based on GaAs / AlGaAs with cutoff wavelengths of 5.1 µm and 8.4 µm (6). Major advantages of such photoconductive ISB detectors are a competitive responsivity and a good detectivity, especially at low operating temperatures.…”

Section: Introductionmentioning

confidence: 99%

Mid-infrared quantum cascade detectors for applications in spectroscopy and pyrometry

et al. 2010

View full text Add to dashboard Cite

An overview of quantum cascade detector technology for the near-and mid-infrared wavelength range will be given. Thanks to photovoltaic instead of photoconductive operation, quantum cascade detectors offer great opportunities in terms of detection speed, room temperature operation, and detectivity. Besides some crucial issues dealing with fabrication and general characteristics, some possibilities for performance improvement will also be briefly presented. In a theory section, some basic considerations adopted from photoconductive detectors confirm the necessity of various trade-offs for the optimization of such devices. Nevertheless, we will show several possible measures to push the key performance figures of these detectors closer to their physical and technological limits.

show abstract

Development of mid-wavelength and long-wavelength megapixel portable QWIP imaging cameras

Cited by 15 publications

References 19 publications

Quantum Cascade Detectors

Quantum Cascade Detectors

Photovoltaic and optoelectronic properties of InAs(100)-based photoconductive cells with quantum dots and nanopits

Mid-infrared quantum cascade detectors for applications in spectroscopy and pyrometry

Contact Info

Product

Resources

About