Coherent control of energy transfer in a quantum dot strongly coupled to a photonic crystal molecule

Tao Cai; Ranojoy Bose; Kaushik Roy Choudhury; Glenn S. Solomon; Edo Waks

doi:10.1117/12.2078199

4 March 2015 Coherent control of energy transfer in a quantum dot strongly coupled to a photonic crystal molecule

Tao Cai, Ranojoy Bose, Kaushik Roy Choudhury, Glenn S. Solomon, Edo Waks

Proceedings Volume 9377, Advances in Photonics of Quantum Computing, Memory, and Communication VIII; 93770A (2015) https://doi.org/10.1117/12.2078199
Event: SPIE OPTO, 2015, San Francisco, California, United States

Abstract

Vacuum Rabi oscillation is a damped oscillation in which energy can transfer between an atomic excitation and a photon when an atom is strongly coupled to a photonic cavity. This process is challenging to be coherently controlled due to the fact that interaction between the atom and the electromagnetic resonator needs to be modulated in a quick manner compared to vacuum Rabi frequency. This control has been achieved at microwave frequencies, but has remained challenging to be implemented in the optical domain. Here we demonstrated coherent control of energy transfer in a semiconductor quantum dot strongly coupled to a photonic crystal molecule by manipulating the vacuum Rabi oscillation of the system. Instead of using a single photonic crystal cavity, we utilized a photonic crystal molecule consisting two coupled photonic crystal defect cavities to obtain both strong quantum dot-cavity coupling and cavityenhanced AC stark shift. In our system the AC stark shift modulates the coupling interaction between the quantum dot and the cavity by shifting the quantum dot resonance, on timescales (picosecond) shorter than the vacuum Rabi period. We demonstrated the ability to transfer excitation between a quantum dot and cavity, and performed coherent control of light-matter states. Our results provides an ultra-fast approach for probing and controlling light-matter interactions in an integrated nanophotonic device, and could pave the way for gigahertz rate synthesis of arbitrary quantum states of light at optical frequencies.

Citation Download Citation

Tao Cai, Ranojoy Bose, Kaushik Roy Choudhury, Glenn S. Solomon, and Edo Waks "Coherent control of energy transfer in a quantum dot strongly coupled to a photonic crystal molecule", Proc. SPIE 9377, Advances in Photonics of Quantum Computing, Memory, and Communication VIII, 93770A (4 March 2015); https://doi.org/10.1117/12.2078199

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KEYWORDS

Quantum dots

Photonic crystals

Molecular photonics

Picosecond phenomena

Molecules

Polaritons

Energy transfer

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