Phase-dependent microwave response of a graphene Josephson junction

Haller, R.; Fülöp, Gergő; Indolese, David I.; Ridderbos, Joost; Kraft, Rainer; Yi, Cheung, Luk; Ungerer, Jann Hinnerk; Watanabe, Kenji; Taniguchi, Takashi; Beckmann, D.; Danneau, R.; Virtanen, Pauli; Schönenberger, Christian

doi:10.1103/physrevresearch.4.013198

Cited by 18 publications

(13 citation statements)

References 47 publications

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“…Application of CQED techniques has revealed different quasiparticle occupation configurations of Andreev levels [2,4,6,7], which is possible because the different states of the quantum system have different electrodynamical susceptibility [27]. However, beyond state determination, the magnitude and dispersion of the response functions of individual states carry a wealth of physical information [10,[28][29][30][31]. This information complements that of microwave and tunneling spectroscopy which are restricted to transitions between states of the same and opposite parity, respectively.…”

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confidence: 99%

Microwave Susceptibility Observation of Interacting Many-Body Andreev States

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confidence: 99%

Microwave Susceptibility Observation of Interacting Many-Body Andreev States

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“…Graphene-based Josephson junction bolometers show a fast thermal relaxation ∼17 ps operating at 3 GHz [136]. Recent studies on Gr-Josephson junction bolometer shows a NEP of 7×10 −19 W Hz −1/2 , limited only by intrinsic thermal fluctuations [137]. The superconducting-Gr-superconducting junction is coupled to an onchip LC oscillator.…”

Section: Photodetector Performance Of 2d Materials and Hybridsmentioning

confidence: 99%

Engineering sensitivity and spectral range of photodetection in van der Waals materials and hybrids

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Exploration of van der Waals heterostructures in the field of optoelectronics has produced photodetectors with very high bandwidth as well as ultra-high sensitivity. Appropriate engineering of these heterostructures allows us to exploit multiple light-to-electricity conversion mechanisms, ranging from photovoltaic, photoconductive to photogating processes. These mechanisms manifest in different sensitivity and speed of photoresponse. In addition, integrating graphene-based hybrid structures with photonic platforms provides a high gain-bandwidth product, with bandwidths >> 1 GHz. In this review, we discuss the progression in the field of photodetection in 2D hybrids. We emphasize the physical mechanisms at play in diverse architectures and discuss the origin of enhanced photoresponse in hybrids. Recent developments in 2D photodetectors based on room temperature detection, photon-counting ability, integration with Si and other pressing issues, that need to be addressed for these materials to be integrated with industrial standards have been discussed.

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“…On the other hand, as mentioned above, the Majorana edge states can have a large optical conductance far exceeding e 2 /h. Using parameters from a recent experiment on 2D Majorana modes [17,31], we estimate that the amplitude of the absorption peak, or a reflection dip in a microwave transmission measurement, can be several percent, making the scheme directly experimentally measurable [34].…”

Section: Experimental Detectionmentioning

confidence: 99%

Directly probing the chirality of Majorana edge states

Virtanen

Heikkilä

2022

Phys. Rev. B

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We propose to directly probe the chirality of Majorana edge states in 2D topological superconductors using polarization selective photon absorption. When shining circularly polarized light on a 2D topological superconductor in disk geometry, the photons can excite quasiparticles only when the polarization of the light matches the chirality of the Majorana edge states required by the angular momentum conservation. Hence, one can obtain the chirality of the Majorana edge states by measuring the photon absorption rate. We show that the polarization selective photon absorption can also serve as smoking gun evidence of the chiral Majorana edge mode.

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Phase-dependent microwave response of a graphene Josephson junction

Cited by 18 publications

References 47 publications

Microwave Susceptibility Observation of Interacting Many-Body Andreev States

Microwave Susceptibility Observation of Interacting Many-Body Andreev States

Engineering sensitivity and spectral range of photodetection in van der Waals materials and hybrids

Directly probing the chirality of Majorana edge states

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