Dynamic Control of Spontaneous Emission Using Magnetized InSb Higher-Order-Mode Antennas

• URL: http://arxiv.org/abs/2311.07083v1
• Date: Mon, 13 Nov 2023 05:19:59 GMT
• Title: Dynamic Control of Spontaneous Emission Using Magnetized InSb Higher-Order-Mode Antennas
• Authors: Sina Aghili, Rasoul Alaee, Amirreza Ahmadnejad, Ehsan Mobini, Mohamadreza Mohamadpour, Carsten Rockstuhl, Robert W. Boyd, Ksenia Dolgaleva
• Abstract summary: We propose THz sub-wavelength antenna designs that tune the radiative decay rates of dipole emitters at their proximity. The proposed designs include a spherical InSb antenna and a cylindrical Si-InSb hybrid antenna that demonstrate distinct behaviors. These novel mechanisms are potentially promising for tunable THz single-photon sources in integrated quantum networks.
• Score: 0.0
• License: http://creativecommons.org/publicdomain/zero/1.0/
• Abstract: We exploit InSb's magnetic-induced optical properties to propose THz sub-wavelength antenna designs that actively tune the radiative decay rates of dipole emitters at their proximity. The proposed designs include a spherical InSb antenna and a cylindrical Si-InSb hybrid antenna that demonstrate distinct behaviors; the former dramatically enhances both radiative and non-radiative decay rates in the epsilon-near-zero region due to the dominant contribution of the Zeeman splitting electric octupole mode. The latter realizes significant radiative decay rate enhancement via magnetic octupole mode, mitigating the quenching process and accelerating the photon production rate. A deep learning-based optimization of emitter positioning further enhances the quantum efficiency of the proposed hybrid system. These novel mechanisms are potentially promising for tunable THz single-photon sources in integrated quantum networks.

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