All-optically triggerable organic/inorganic photonic devices

Andrea M. Armani; Jinghan He; Andre Kovach; Patrick Saris

doi:10.1117/12.2542462

2 March 2020 All-optically triggerable organic/inorganic photonic devices

Andrea M. Armani, Jinghan He, Andre Kovach, Patrick Saris

Proceedings Volume 11266, Laser Resonators, Microresonators, and Beam Control XXII; 112660J (2020) https://doi.org/10.1117/12.2542462
Event: SPIE LASE, 2020, San Francisco, California, United States

Abstract

Optical resonant cavities form the foundation for a wide range of integrated optical components. While a high performance laser requires a high quality factor (Q) cavity, other types of devices, like modulators, rely on the cavity resonant wavelength being tunable. Numerous mechanisms based on the thermo-optic and electro-optic effects have been leveraged to create switchable or tunable devices; however, these are very power hungry and/or require complex control machinery. In the present work, we graft an air-stable, optically triggerable functional group to the surface of an ultra-high-Q optical cavity. The Aazobenzene functional group switches from trans to cis upon exposure to blue light, and it can be thermally triggered to revert to the initial trans state. Using a single tapered optical fiber waveguide, blue and near-IR light can be coupled into the device simultaneously. When the blue light interacts with the Aazo group, the resonant wavelength blue shifts. Upon exposure to a CO2 laser, the resonant wavelength returns to its initial position. Several different aspects of the device operation were investigated, including the kinetics of the switching, the effect of switching via a resonant or non-resonant optical field, and sterics of the switching. Notably, by tuning the surface density of the Aazo groups using a multi-material surface chemistry, it is possible to control the magnitude of the shift.

Citation Download Citation

Andrea M. Armani, Jinghan He, Andre Kovach, and Patrick Saris "All-optically triggerable organic/inorganic photonic devices", Proc. SPIE 11266, Laser Resonators, Microresonators, and Beam Control XXII, 112660J (2 March 2020); https://doi.org/10.1117/12.2542462

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KEYWORDS

Polarization

Raman spectroscopy

Chemistry

Silica

Photonic devices

Integrated optics

Disk lasers

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