A Room Temperature Bolometer for Terahertz Coherent and Incoherent Detection

Cherednichenko, Serguei; Hammar, Arvid; Bevilacqua, Stella; Drakinskiy, Vladimir; Stake, Jan; Kalabukhov, A.

doi:10.1109/tthz.2011.2164654

Cited by 38 publications

(32 citation statements)

References 22 publications

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“…Previously we reported that the bolometer responsivity scales inversely with the device lateral dimensions (the width times the length), which is in concurs with the bolometer cooling into the substrate via the phonon exchange [4]. There, we predicted a great improvement of the sensitivity when the bolometer size becomes sub micrometer.…”

Section: Introductionsupporting

confidence: 83%

Fast room temperature THz bolometers

Bevilacqua

Cherednichenko

2013

2013 38th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)

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Section: Introductionsupporting

confidence: 83%

Fast room temperature THz bolometers

Bevilacqua

Cherednichenko

2013

2013 38th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)

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“…Room temperature, portable focal plane arrays (FPAs) are in high demand for terahertz (THz) imaging systems and applications in recent years [1][2][3][4]. As compared to conventional Schottky diodes, Sb-based HBD devices exhibit higher zero-bias curvature coefficient (γ), intrinsically higher responsivity and lower noise equivalent power (NEP) level, making them suitable for THz detection and imaging at room temperature.…”

Section: Introductionmentioning

confidence: 99%

“…1 (b)) with number of turns N =3, arm width w=12 ȝm and arm gap g=12 ȝm. According to antenna theory, the embedding impedance at the feed point of the FDA is proportional to N by [4],…”

Section: Introductionmentioning

confidence: 99%

Terahertz focal plane arrays employing heterostructure backward diodes integrated with folded dipole antennas

Rahman

Jiang

Xie

et al. 2013

2013 IEEE MTT-S International Microwave Symposium Digest (MTT)

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In this paper, we present the design, simulation, fabrication and initial characterization results of terahertz (THz) focal plane arrays (FPAs) employing Sb-based heterostructure backward diodes (HBDs) integrated with lens-coupled foldeddipole antennas (FDAs). For single array element design, FDAs with high embedding-impedances have been designed for impedance matching to HBDs without additional matching network. Under impedance matching conditions, a maximum detector responsivity of ~21,000 V/W could be obtained for single array pixel at 200 GHz. In order to expand the single element design into full 2-D THz FPAs, the off-axis radiation patterns of the FDA mounted on an extended hemispherical silicon lens have been analyzed using the ray tracing technique. In addition, mutual coupling between two adjacent FDAs has been studied using full-wave simulation. The above results along with initial array fabrication and device characterization results have demonstrated the potential to achieve room-temperature, highperformance and large-scale FPAs for THz imaging applications.

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“…Their most important advantage is the wide detection range, from THz to x rays, although they suffer from a slow response time of the order of milliseconds at liquid helium temperature [6]. Recently, antenna coupled superconducting bolometers have been reported to operate at higher temperatures [7,8]. Nevertheless, their detection bandwidth is limited to the bandwidth of the antenna.…”

Section: Introductionmentioning

confidence: 99%

Large-area microstructured photomixer as scannable detector of continuous-wave terahertz radiation

et al. 2012

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Detection of continuous-wave (CW) terahertz (THz) radiation is demonstrated using a large-area microstructured photomixer. The photomixer, which has interdigitated electrodes, is utilized in an incoherent detection scheme without any focusing optics for the incoming THz radiation. The large-area microstructured photomixer is driven at a high laser power of 900 mW, which results in an increased responsivity of 120 mA/W, in comparison with conventional small-area photomixer detectors. By mapping out the receiving pattern of the photomixer detector, we show that the large-area photomixer is capable of scanning the incident THz beam by changing the incidence angles of the CW laser beams used in the photomixing detection process. We demonstrate a scan range of 50°. Moreover, the optimum spot size of the laser beams illuminating the photomixer detector for maximizing the responsivity of the detector is specified.

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A Room Temperature Bolometer for Terahertz Coherent and Incoherent Detection

Abstract: Index Terms-Bolometer, mixer, terahertz (THz), submillimeter, YBCO. room temperature detector.

Cited by 38 publications

References 22 publications

Fast room temperature THz bolometers

Fast room temperature THz bolometers

Terahertz focal plane arrays employing heterostructure backward diodes integrated with folded dipole antennas

Large-area microstructured photomixer as scannable detector of continuous-wave terahertz radiation

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