Disk patch resonators for cavity quantum electrodynamics at the terahertz frequency

Derntl, Christian G.; Bachmann, Dominic; Unterrainer, K.; Darmo, J.

doi:10.1364/oe.25.012311

Cited by 5 publications

(3 citation statements)

References 27 publications

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“…Figure 3f shows that the optimal interaction length L opt needed to achieve |

| ≈ 0.707, which is on the order of ≈10 nm to ≈100 µm, falls in the range of experimentally realizable optical and terahertz cavity dimensions. [ 106 , 107 , 108 , 109 , 110 , 111 , 112 , 113 , 114 ] Furthermore, the required QEW energies, which range from ≈100 eV to ≈1 MeV, are achievable using lab‐scale electron sources. Thus, it should be already feasible to perform experiments to observe quantum interference in spontaneous emission from superconducting qubits and quantum dots, [ 115 , 116 , 117 , 118 , 119 , 120 , 121 , 122 , 123 , 124 , 125 ] which radiate in the terahertz and optical regimes (Section SIII , Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Quantum Interference between Fundamentally Different Processes Is Enabled by Shaped Input Wavefunctions

et al. 2023

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This work presents a general framework for quantum interference between processes that can involve different fundamental particles or quasi‐particles. This framework shows that shaping input wavefunctions is a versatile and powerful tool for producing and controlling quantum interference between distinguishable pathways, beyond previously explored quantum interference between indistinguishable pathways. Two examples of quantum interference enabled by shaping in interactions between free electrons, bound electrons, and photons are presented: i) the vanishing of the zero‐loss peak by destructive quantum interference when a shaped electron wavepacket couples to light, under conditions where the electron's zero‐loss peak otherwise dominates; ii) quantum interference between free electron and atomic (bound electron) spontaneous emission processes, which can be significant even when the free electron and atom are far apart, breaking the common notion that a free electron and an atom must be close by to significantly affect each other's processes. Conclusions show that emerging quantum wave‐shaping techniques unlock the door to greater versatility in light‐matter interactions and other quantum processes in general.

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“…Figure 3f shows that the optimal interaction length L opt needed to achieve |

Section: Resultsmentioning

confidence: 99%

Quantum Interference between Fundamentally Different Processes Is Enabled by Shaped Input Wavefunctions

et al. 2023

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“…Figure. 3(a) shows that the corresponding L opt ranging from tens of nm to hundreds of µm, which correspond to experimentally realizable waveguide/cavity dimensions in the optical [149][150][151][152] to terahertz regimes [153][154][155][156][157]. An approximate analytical expression for L opt is presented in SM Section III.…”

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confidence: 96%

Control of atom-photon interactions with shaped quantum electron wavepackets

Lim¹,

Ang²,

Ang³

et al. 2021

Preprint

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Photon emission from atoms and free electrons underlie a wealth of fundamental science and technological innovations. We present a regime where atom-photon and electron-photon interactions interfere with each other, resulting in substantial changes in the spontaneous emission rate compared to the sum of each interaction considered in isolation. We highlight the critical role played by quantum electron wavepackets, and how the emission can be tailored via the electron waveshape, as well as the atomic population and coherence. Our findings reveal that atom-photon and electron-photon interactions cannot be considered in isolation even when higher-order contributions involving all three bodies (atom, photon and free electron) are negligible. Our findings pave the way to more precise control over photon emission processes and related diagnostics.

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“…Therefore, a large interest is being devoted to terahertz resonators. For instance, strong light-matter coupling between the cyclotron resonances of a 2D electron gas and terahertz photons have been reported in terahertz resonators such as metamaterials and Fabry–Perot cavities, opening very attractive perspectives for cavity quantum electrodynamics. , The enhanced coupling of terahertz light to intersubband transitions in heterostructures has been demonstrated in disk patch resonators and in subwavelength metal–dielectric microcavities leading to the first generation of cavity polaritons in the terahertz frequency range. The integration of quantum wells into subwavelength three-dimensional resonant circuit , and into patch antenna cavity array significantly improves performances of terahertz detectors.…”

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confidence: 99%

Tamm Cavity in the Terahertz Spectral Range

et al. 2020

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Electromagnetic resonators, which are based on optical cavities or electronic circuits, are key elements to enhance and control light-matter interaction. In the THz range, current optical cavities exhibit very high-quality factors with (λ/2) 3 mode volumes limited by diffraction, whereas resonant electronic circuits show low quality factor but provide strong subwavelength effective volume (10 −6 λ 3 ). To overcome the limitations of each type of resonator, great efforts are being devoted to improving the performances of current methods or to the emergence of original approaches. Here, we report on an optical resonator based on Tamm modes newly applied to the THz range, comprising a metallic layer on a distributed Bragg reflector and demonstrating a high-quality factor of 230 at ~1THz. We further experimentally and theoretically show a fine-tuning of the Tamm mode frequency (over a 250 GHz range) and polarization sensitivity by subwavelength structuration of the metallic layer. Electromagnetic simulations also reveal that THz Tamm modes are confined over a λ/2 length within the distributed Bragg reflector and can be ideally coupled to both bulk materials and 2D materials. These THz Tamm cavities are therefore attractive as basic building blocks of lasers, for the development of advanced THz optoelectronic devices such as sensitive detectors, high-contrast modulators, narrow filters, and polarizers, as well as for THz cavity quantum electrodynamics in nanostructures.

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Disk patch resonators for cavity quantum electrodynamics at the terahertz frequency

Cited by 5 publications

References 27 publications

Quantum Interference between Fundamentally Different Processes Is Enabled by Shaped Input Wavefunctions

Quantum Interference between Fundamentally Different Processes Is Enabled by Shaped Input Wavefunctions

Control of atom-photon interactions with shaped quantum electron wavepackets

Tamm Cavity in the Terahertz Spectral Range

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