8 September 2015 Spin-photonic devices based on crystalline-AlOx / GaAs for emission and detection of circular polarized light
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Abstract
In 2014, we were able to report 1-kHz, electrical helicity switching of circular polarization (CP) at low temperatures using dual-electrode spin-LEDs [1] and detection of CP up to RT by operating reversely the spin-LEDs [2]. Those LEDs consisted of n-AlGaAs/undoped-InGaAs/p-AlGaAs double heterojunctions and newly developed crystalline γ-like AlOx (x-AlOx) tunnel barriers [3]. Presented here are progresses made in the period 2014-2015, including 1-MHz helicity switching, a high CP value of PEL = 0.12 at RT, and development of a phenomenological model for spin photodiode (PD), all of which are important towards the realization of spin-photonic devices.
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H. Munekata, H. Munekata, M. Aoyama, M. Aoyama, R. Roca, R. Roca, K. Nishibayashi, K. Nishibayashi, N. Nishizawa, N. Nishizawa, } "Spin-photonic devices based on crystalline-AlOx / GaAs for emission and detection of circular polarized light", Proc. SPIE 9551, Spintronics VIII, 955120 (8 September 2015); doi: 10.1117/12.2187003; https://doi.org/10.1117/12.2187003
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