Journal Article10.1109/JQE.2012.2206798
Asymmetric Fabry–Perot Oscillations in Metal Grating-Coupled Terahertz Quantum Well Photodetectors
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TL;DR: In this article, a 1D metal grating-coupled terahertz quantum well photodetector (THzQWP) was analyzed through analysis of the field in the device obtained by the finite element method.
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Abstract: Asymmetric Fabry-Perot oscillations are observed in a high-resolution photocurrent spectrum of a 1-D metal grating-coupled terahertz quantum well photodetector (THzQWP). This behavior is carefully studied through analysis of the field in the device obtained by the finite element method. It is found that such asymmetric oscillation is a pure near-field effect caused by the phase shift of the reflected wave at the grating surface. Our findings also indicate that, because of the long wavelength in the THz range, the near field properties of a microstructured surface could be extracted through the photocurrent measurement on a THzQWP.
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Citations
Terahertz quantum well photo-detectors: grating versus 45° facet coupling
TL;DR: In this paper, two GaAs/AlGaAs-based terahertz (THz) quantum well photo-detectors (QWPs) with one-dimensional (1D) metal grating and 45? facet light coupling configurations were demonstrated.
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References
How good is the polarization selection rule for intersubband transitions
TL;DR: Using GaAs-based infrared photodetectors (QWIPs) with either GaAs or InGaAs wells, the accuracy of the polarization selection rule for conduction band intersubband transitions was investigated in this article.
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Metal-Grating-Coupled Terahertz Quantum-Well Photodetectors
TL;DR: In this paper, three terahertz (THz) GaAs/AlGaAs quantum-well photodetectors with different 1-D metal gratings are fabricated for front-incident detection of THz waves.
Imaging and Analysis of THz Surface Plasmon Polariton Waves with the Integrated Sub-wavelength Aperture Probe
Raimund Mueckstein,Chris Graham,Cyril C. Renaud,Alwyn J. Seeds,James A. Harrington,Oleg Mitrofanov +5 more
TL;DR: In this article, the integrated subwavelength aperture probe designed for THz near-field scanning probe microscopy can be used to map surface plasmon waves at THz frequencies.
Terahertz frontside-illuminated quantum-well photodetector.
Mikhail Patrashin,Iwao Hosako +1 more
TL;DR: In this article, a frontside illuminated GaAs/AlGaAs photodetector based on intersubband absorption in a quantum well with a targeted peak frequency of 3 THz was demonstrated.
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Near field and cavity effects on coupling efficiency of one-dimensional metal grating for terahertz quantum well photodetectors
TL;DR: In this article, the modal method is employed to simulate the coupling between the terahertz wave and one-dimensional transmissive metal grating on the top of terrahertz quantum well photodetectors (THzQWPs).