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Slot-Mode Optomechanical Crystals: A Versatile Platform for Multimode Optomechanics.
Karen E Grutter1, Marcelo I Davanço1, Kartik Srinivasan1
1Center for Nanoscale Science and Technology, National Institute of Standards and Technology, Gaithersburg, MD 20899-6203 USA.
Optica
|January 26, 2016
Summary
Researchers developed flexible slot-mode optomechanical crystals for enhanced multimode systems. These devices enable strong coupling between optical and mechanical modes, paving the way for advanced quantum information science and metrology applications.
Area of Science:
- Optomechanics
- Nanophotonics
- Quantum Information Science
Background:
- Cavity optomechanical systems are crucial for metrology, communications, and quantum information science.
- Developing multimode architectures with flexible designs and strong interactions remains a key challenge.
Purpose of the Study:
- To demonstrate slot-mode optomechanical crystals for flexible multimode optomechanics.
- To achieve substantial optomechanical coupling rates in novel device architectures.
Main Methods:
- Fabrication of slot-mode optomechanical crystals using stoichiometric Si3N4.
- Confining mechanical breathing modes and low-loss optical modes within coupled nanobeam structures.
- Utilizing tensile stress for precise slot width control (down to 24 nm).
Main Results:
- Demonstrated devices with optical modes (980 nm band) coupled to mechanical modes at 3.4 GHz, 1.8 GHz, and 400 MHz.
- Achieved enhanced optomechanical coupling, leading to self-oscillation observations.
- Developed triple-beam geometries for dual optical-mechanical mode coupling.
Conclusions:
- Slot-mode optomechanical crystals offer significant design flexibility for multimode systems.
- The demonstrated architecture enables large optomechanical coupling rates on a chip scale.
- These advancements are vital for future quantum technologies and precision measurement.
