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We report on the development and testing of a coplanar stripline antenna thatis designed for integration in a magneto-photoluminescence experiment to allowcoherent control of individual electron spins confined in single self-assembledsemiconductor quantum dots. We discuss the design criteria for such a structurewhich is multi-functional in the sense that it serves not only as microwavedelivery but also as electrical top gate and shadow mask for the single quantumdot spectroscopy. We present test measurements on hydrogenated amorphoussilicon, demonstrating electrically detected magnetic resonance using thein-plane component of the oscillating magnetic field created by the coplanarstripline antenna necessary due to the particular geometry of the quantum dotspectroscopy. From reference measurements using a commercial electron spinresonance setup in combination with finite element calculations simulating thefield distribution in the structure, we obtain an average magnetic field of~0.2mT at the position where the quantum dots would be integrated into thedevice. The corresponding pi-pulse time of ~0.3us fully meets the requirementsset by the high sensitivity optical spin read-out scheme developed for thequantum dot.

Coplanar stripline antenna design for optically detected magnetic resonance on semiconductor quantum dots