Plasmonic lens enhanced mid-infrared quantum cascade detector

Harrer, Andreas; Schwarz, Benedikt; Gansch, Roman; Reininger, Peter; Detz, Hermann; Zederbauer, Tobias; Andrews, A. M.; Schrenk, W.; Strasser, G.

doi:10.1063/1.4901043

Cited by 25 publications

(11 citation statements)

References 18 publications

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“…No compromise in operation speed was reported due to the presence of the grating [52]. This approach was also applied in mid-IR detection [54], by delivering light into a quantum cascade detector, and in THz detection [55], by delivering light into a GaAs/AlGaAs 2d-electron-gas bolometer.…”

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confidence: 99%

Surface Plasmon Polariton Graphene Photodetectors

et al. 2015

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The combination of plasmonic nanoparticles and graphene enhances the responsivity and spectral selectivity of graphene-based photodetectors. However, the small area of the metal-graphene junction, where the induced electron-hole pairs separate, limits the photoactive region to sub-micron length scales. Here, we couple graphene with a plasmonic grating and exploit the resulting surface plasmon polaritons to deliver the collected photons to the junction region of a metal-graphenemetal photodetector. This results into a 400% enhancement of responsivity and a 1000% increase in photoactive length, combined with tunable spectral selectivity. The interference between surface plasmon polaritons and the incident wave introduces new functionalities, such as light flux attraction or repulsion from the contact edges, enabling the tailored design of the photodetector's spectral response. This architecture can also be used for surface plasmon bio-sensing with direct-electricreadout, eliminating the need of complicated optics.Graphene-based photodetectors (PDs) [1,2] have been reported with ultra-fast operating speeds (up to 262GHz from the measured intrinsic response time of graphene carriers [3]) and broadband operation from the visible and infrared [3][4][5][6][7][8][9][10][11][12][13][14][15][16] up to the THz [17][18][19]. The simplest graphene-based photodetection scheme relies on the metal-graphene-metal (MGM) architecture [5,7,8,11,[20][21][22], where the photoresponse is due to a combination of photo-thermoelectric and photovoltaic effects [5,7,8,11,[20][21][22]. For both mechanisms, the presence of a junction is required to spatially separate excited electronhole (e-h) pairs [5,7,8,11,[20][21][22]. At the metal-graphene junction, a work-function difference causes charge transfer and a shift of the graphene Fermi level underneath the contact [4,5,7,23], compared to that of graphene away from the contact [4,5,7,23], resulting into a build-up of an internal electric field (photovoltaic mechanism) [5,7,24,25] and into a difference of Seebeck coefficients (photo-thermoelectric mechanism) [11,21,26]. An alternative way to create a junction is to use a set of gate electrodes to electrostatically dope graphene [8,11].

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confidence: 99%

Surface Plasmon Polariton Graphene Photodetectors

et al. 2015

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“…• An infrared camera with a quantum cascade detector [12] were mounted after the demonstrations to find the heat trace of alive victims as well as the presence of CO 2 in the air.…”

Section: Sensor Systemmentioning

confidence: 99%

Unmanned Ground Robots for Rescue Tasks

Berns¹,

Nezhadfard²,

Tosa³

et al. 2017

Search and Rescue Robotics - From Theory to Practice

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This chapter describes two unmanned ground vehicles that can help search and rescue teams in their difficult, but life-saving tasks. These robotic assets have been developed within the framework of the European project ICARUS. The large unmanned ground vehicle is intended to be a mobile base station. It is equipped with a powerful manipulator arm and can be used for debris removal, shoring operations, and remote structural operations (cutting, welding, hammering, etc.) on very rough terrain. The smaller unmanned ground vehicle is also equipped with an array of sensors, enabling it to search for victims inside semi-destroyed buildings. Working together with each other and the human search and rescue workers, these robotic assets form a powerful team, increasing the effectiveness of search and rescue operations, as proven by operational validation tests in collaboration with end users.

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“…These features have fostered the research interest on plasmonics-based applications in fields like information technology [14], imaging and sensing [16,17,18,19], optoelectronics [20,21,22] and nanophotolithography [23,24,25,26,27,28]. Various optical devices, such as light concentrators [29,30,31,32], waveguides [33,34,35,36], lenses [37,38,39], photodetectors [40,41,42,43,44], heterostructures [45,46,47], metamaterials [48,49,50,51,52], reflectors [53,54] and deflectors [55,56], have been proposed and demonstrated to realize various functionalities through the control of SPP propagation at the subwavelength scale [57,58]. Consequently, the manipulation of SPPs plays an essential role in the performance of plasmonic devices.…”

Section: Introductionmentioning

confidence: 99%

Experimental Demonstration of Surface Plasmon Polaritons Reflection and Transmission Effects

Zheng

Zywietz

Evlyukhin

et al. 2019

Sensors

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Special integrated photonic surface structures composed of a dielectric semicircle ridge and a dielectric block placed on a metal substrate are proposed for the investigation of surface plasmon polariton (SPP) reflection and transmission effects. A fabrication method called microscope projection photolithography was employed for the preparation of the structures. Leakage radiation microscopy was applied for the excitation and observation of surface plasmon polaritons (SPPs). It was observed that SPPs exhibit a remarkable decrease in intensity when impinging onto the rectangular dielectric block. Nevertheless, the transmitted wave out of the dielectric block was always observable. The propagation behavior of both the reflected waves at two boundaries (air/dielectric and dielectric/air) and the transmitted wave inside the dielectric block were demonstrated for different SPP incident conditions. The variation of the angles of reflection and transmission with respect to the incident angle was analytically and experimentally investigated. An agreement between the calculated results and the experimental results was obtained. Our findings might allow for novel applications in sensing and analytics once the structures will be functionalized.

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Plasmonic lens enhanced mid-infrared quantum cascade detector

Cited by 25 publications

References 18 publications

Surface Plasmon Polariton Graphene Photodetectors

Surface Plasmon Polariton Graphene Photodetectors

Unmanned Ground Robots for Rescue Tasks

Experimental Demonstration of Surface Plasmon Polaritons Reflection and Transmission Effects

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