Dual-band MWIR/LWIR focal plane arrays based on III-V strained-layer superlattices

2018 ◽  
Author(s):  
Brett Z. Nosho ◽  
Alexander R. Gurga ◽  
Sevag Terterian ◽  
Shuoqin Wang ◽  
Rajesh D. Rajavel
Keyword(s):  
Focal Plane ◽  
Focal Plane Arrays ◽  
Dual Band ◽  
Strained Layer ◽  
Strained Layer Superlattices

Longwave infrared focal plane arrays from type-II strained layer superlattices

2011 ◽  
Vol 54 (3) ◽  
pp. 243-246 ◽  
Author(s):  
Mani Sundaram ◽  
Axel Reisinger ◽  
Richard Dennis ◽  
Kelly Patnaude ◽  
Douglas Burrows ◽  
...  
Keyword(s):  
Focal Plane ◽  
Focal Plane Arrays ◽  
Type Ii ◽  
Infrared Focal Plane Arrays ◽  
Strained Layer ◽  
Strained Layer Superlattices

scholarly journals The NIKA2 large-field-of-view millimetre continuum camera for the 30 m IRAM telescope

2018 ◽  
Vol 609 ◽  
pp. A115 ◽  
Author(s):  
R. Adam ◽  
A. Adane ◽  
P. A. R. Ade ◽  
P. André ◽  
A. Andrianasolo ◽  
...  
Keyword(s):  
Focal Plane ◽  
High Redshift ◽  
General Purpose ◽  
Focal Plane Arrays ◽  
Field Of View ◽  
Dual Band ◽  
Large Field ◽  
Kinetic Inductance Detectors ◽  
Kinetic Inductance ◽  
Millimetre Wave

Context. Millimetre-wave continuum astronomy is today an indispensable tool for both general astrophysics studies (e.g. star formation, nearby galaxies) and cosmology (e.g. cosmic microwave background and high-redshift galaxies). General purpose, large-field-of-view instruments are needed to map the sky at intermediate angular scales not accessible by the high-resolution interferometers (e.g. ALMA in Chile, NOEMA in the French Alps) and by the coarse angular resolution space-borne or ground-based surveys (e.g. Planck, ACT, SPT). These instruments have to be installed at the focal plane of the largest single-dish telescopes, which are placed at high altitude on selected dry observing sites. In this context, we have constructed and deployed a three-thousand-pixel dual-band (150 GHz and 260 GHz, respectively 2 mm and 1.15 mm wavelengths) camera to image an instantaneous circular field-of-view of 6.5 arcmin in diameter, and configurable to map the linear polarisation at 260 GHz. Aims. First, we are providing a detailed description of this instrument, named NIKA2 (New IRAM KID Arrays 2), in particular focussing on the cryogenics, optics, focal plane arrays based on Kinetic Inductance Detectors, and the readout electronics. The focal planes and part of the optics are cooled down to the nominal 150 mK operating temperature by means of an adhoc dilution refrigerator. Secondly, we are presenting the performance measured on the sky during the commissioning runs that took place between October 2015 and April 2017 at the 30-m IRAM telescope at Pico Veleta, near Granada (Spain). Methods. We have targeted a number of astronomical sources. Starting from beam-maps on primary and secondary calibrators we have then gone to extended sources and faint objects. Both internal (electronic) and on-the-sky calibrations are applied. The general methods are described in the present paper. Results. NIKA2 has been successfully deployed and commissioned, performing in-line with expectations. In particular, NIKA2 exhibits full width at half maximum angular resolutions of around 11 and 17.5 arcsec at respectively 260 and 150 GHz. The noise equivalent flux densities are, at these two respective frequencies, 33±2 and 8±1 mJy s1/2. A first successful science verification run was achieved in April 2017. The instrument is currently offered to the astronomy community and will remain available for at least the following ten years.

Dual-band millimeter-wave/infrared focal-plane arrays

2005 ◽  
Vol 46 (1) ◽  
pp. 78-80 ◽  
Author(s):  
M. Abdel-Rahman ◽  
B. Lail ◽  
G. D. Boreman
Keyword(s):  
Millimeter Wave ◽  
Focal Plane ◽  
Focal Plane Arrays ◽  
Dual Band ◽  
Infrared Focal Plane Arrays

IMAGING PERFORMANCE OF ADVANCED QWIP FOCAL PLANE ARRAYS

2002 ◽  
Vol 12 (03) ◽  
pp. 659-690 ◽  
Author(s):  
ARNOLD GOLDBERG
Keyword(s):  
Quantum Efficiency ◽  
Temperature Difference ◽  
Focal Plane ◽  
Focal Plane Arrays ◽  
Operating Conditions ◽  
Dual Band ◽  
Large Format ◽  
Ir Camera ◽  
Wide Range ◽  
Imaging Performance

Since the first demonstration of the quantum well infrared photodetector (QWIP) in the 1980s, there has been much progress in the application of QWIPs to the production infrared (IR) imaging systems. At this time, focal plane arrays (FPAs) made from QWIPs are readily available for insertion in IR cameras with formats as large as 640 × 480 pixels. Several organizations now have commercially available IR camera systems using QWIPs. In spite of the low single-pixel quantum efficiency relative to MCT, excellent IR imagery has been demonstrated with large format (640 × 480 pixels) single-band and moderate format (256 × 256 pixels) dual-band FPAs. With a large-format staring FPA, one can integrate the signal current for a relatively long time to produce images of similar quality to that from a scanned line array run at the same frame rate. In fact, it can be shown that due to the nature of the noise in a QWIP device, the noise performance of a QWIP FPA can be better than that of MCT FPA as long as the conversion efficiency (the product of the quantum efficiency and the photoconductive gain) is high enough for the read-out integrated circuit (ROIC) integration capacitor to be filled in a frame time. In this chapter the results of laboratory and field tests on large-format single-color QWIP FPAs operating in the LWIR band and dual-band FPAs operating in both the MWIR and LWIR bands simultaneously will be shown. Single-color and dual-band arrays will be shown to give excellent imaging performance and that dual-band FPAs offer unique capabilities to investigate the phenomenology of targets and backgrounds. The performance of the FPAs will be presented from a system performance perspective over a wide range of operating conditions (temperature, bias, integration time, etc.). Results of measurements of noise-equivalent temperature difference (NEΔT), minimum resolvable temperature difference (MRTD measured as a function of target spatial frequency), responsivity, and dark current will be reported. Imagery collected in the field will show the utility of large-format LWIR FPAs for increasing the range at which targets can be identified over previous-generation scanning imagers. Dual-band imagery collected using a QWIP FPA will show how such an array as part of a future imaging system may be able to exploit differences in the IR signatures of targets and backgrounds in the MWIR and LWIR bands to enhance the visibility of targets in cluttered environments. We also show how such an array can be used to make accurate remote temperature measurements. Finally, we will compare the performance of state-of-the-art FPAs made from QWIPs and MCT.

LWIR high performance focal plane arrays Based on type-II strained layer superlattice (SLS) materials

2010 ◽  
Author(s):  
A. Hood ◽  
A. J. Evans ◽  
A. Ikhlassi ◽  
G. Sullivan ◽  
E. Piquette ◽  
...  
Keyword(s):  
Focal Plane ◽  
High Performance ◽  
Focal Plane Arrays ◽  
Type Ii ◽  
Strained Layer ◽  
Strained Layer Superlattice

Comparison of HgCdTe and QWIP dual-band focal plane arrays

2001 ◽  
Author(s):  
Arnold C. Goldberg ◽  
Stephen W. Kennerly ◽  
John W. Little ◽  
Herbert K. Pollehn ◽  
T. A. Shafer ◽  
...  
Keyword(s):  
Focal Plane ◽  
Focal Plane Arrays ◽  
Dual Band

Dual-band technology on indium gallium arsenide focal plane arrays

2011 ◽  
Author(s):  
Peter Dixon ◽  
Cory D. Hess ◽  
Chuan Li ◽  
Martin Ettenberg ◽  
John Trezza
Keyword(s):  
Gallium Arsenide ◽  
Indium Gallium Arsenide ◽  
Focal Plane ◽  
Focal Plane Arrays ◽  
Dual Band ◽  
Indium Gallium
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