A process to control light in a micro resonator through a coupling modulation by surface acoustic waves

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Abstract

A novel process to control light through the coupling modulation by surface acoustic wave (SAW) is presented in an optical micro resonator. An optical waveguide modulator of a racetrack resonator on silicon-on-insulator (SOI) technology is took as an example to explore the mechanism. A finite-difference time-domain (FDTD) is developed to simulate the acousto-optical (AO) modulator using the mechanism. An analytical method is presented to verify our proposal. The results show that the process can work well as an optical modulator by SAW.

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Dynamic acousto-optic control of a strongly coupled photonic molecule

Stephan Kapfinger, Thorsten Reichert, Stefan Lichtmannecker … (2015)

Strongly confined photonic modes can couple to quantum emitters and mechanical excitations. To harness the full potential in quantum photonic circuits, interactions between different constituents have to be precisely and dynamically controlled. Here, a prototypical coupled element, a photonic molecule defined in a photonic crystal membrane, is controlled by a radio frequency surface acoustic wave. The sound wave is tailored to deliberately switch on and off the bond of the photonic molecule on sub-nanosecond timescales. In time-resolved experiments, the acousto-optically controllable coupling is directly observed as clear anticrossings between the two nanophotonic modes. The coupling strength is determined directly from the experimental data. Both the time dependence of the tuning and the inter-cavity coupling strength are found to be in excellent agreement with numerical calculations. The demonstrated mechanical technique can be directly applied for dynamic quantum gate operations in state-of-the-art-coupled nanophotonic, quantum cavity electrodynamic and optomechanical systems.

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Dynamic acousto-mechanical control of a strongly coupled photonic molecule

Stephan Kapfinger, Thorsten Reichert, Stefan Lichtmannecker … (2015)

Two-dimensional photonic crystal membranes provide a versatile planar architecture for integrated photonics to control the propagation of light on a chip employing high quality optical cavities, waveguides, beamsplitters or dispersive elements. When combined with highly non-linear quantum emitters, quantum photonic networks operating at the single photon level come within reach. Towards large-scale quantum photonic networks, selective dynamic control of individual components and deterministic interactions between different constituents are of paramount importance. This indeed calls for switching speeds ultimately on the system's native timescales. For example, manipulation via electric fields or all-optical means have been employed for switching in nanophotonic circuits and cavity quantum electrodynamics studies. Here, we demonstrate dynamic control of the coherent interaction between two coupled photonic crystal nanocavities forming a photonic molecule. By using an electrically generated radio frequency surface acoustic wave we achieve optomechanical tuning, demonstrate operating speeds more than three orders of magnitude faster than resonant mechanical approaches. Moreover, the tuning range is large enough to compensate for the inherent fabrication-related cavity mode detuning. Our findings open a route towards nanomechanically gated protocols, which hitherto have inhibited the realization in all-optical schemes.

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Dependence of integrated acousto-optical devices with one and two modulated arms on the static phase difference.

Guofang Fan, Yuan Yuan Li, Chunguang Hu … (2014)

In this paper, we develop an analytical model of an integrated acousto-optical (AO) device with arms modulated by a single surface acoustic wave beam. A comparison between one-arm and two-arm modulation is presented, which shows that two-arm modulation can significantly enhance modulation efficiency by an optimized design. A detailed analysis of the influence of static phase difference on the behavior of the AO devices has been provided, and some interesting results have been obtained. These will be helpful for an optimized design of AO devices for different functionalities.

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Journal

Journal ID (nlm-ta): Sci Rep

Journal ID (iso-abbrev): Sci Rep

Title: Scientific Reports

Publisher: Nature Publishing Group

ISSN (Electronic): 2045-2322

Publication date (Electronic): 03 August 2016

Publication date Collection: 2016

Volume: 6

Electronic Location Identifier: 30681

Affiliations

[1 ]Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , 100190 Beijing, China

[2 ]Shanghai Institute of Measurement and Testing Technology, National Center of Measurement and Testing for East China, National Center of Testing Technology , Shanghai 201203, China

[3 ]State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University , Weijin Road, Tianjin 300072, China

Author notes

[a ] fanguofang@ 123456mail.ipc.ac.cn

[b ] yanchuanguo@ 123456mail.ipc.ac.cn

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Publisher Item ID: srep30681

DOI: 10.1038/srep30681

PMC ID: 4971504

PubMed ID: 27485470

SO-VID: 33ea21a0-3f16-4ea5-a372-885835196dd0

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This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

A process to control light in a micro resonator through a coupling modulation by surface acoustic waves

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Most cited references 3

Dynamic acousto-optic control of a strongly coupled photonic molecule

Dynamic acousto-mechanical control of a strongly coupled photonic molecule

Dependence of integrated acousto-optical devices with one and two modulated arms on the static phase difference.

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