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Voltage-controlled nonlinear optical properties in gold nanofilms via electrothermal effect
Changjian Lv1, Fanchao Meng2, Linghao Cui1
1State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, 130012, China.
Nature Communications
|July 29, 2024
Summary
This study shows voltage can dynamically control nonlinear optical properties in gold nanofilms. This enables tunable fiber lasers with adjustable wavelengths and operation modes.
Area of Science:
- Photonics
- Materials Science
- Nonlinear Optics
Background:
- Dynamic control of optical properties in gold nanostructures is key for advanced photonics.
- Current research often lacks dynamic manipulation of nonlinear optical properties.
Purpose of the Study:
- To demonstrate voltage-controlled nonlinear optical response in gold nanofilms.
- To explore electrothermal effects for dynamic optical property manipulation.
Main Methods:
- Utilized the electrothermal effect to control gold nanofilm properties.
- Applied low voltages (~10 V) to induce changes in optical response.
- Fabricated a voltage-controlled all-fiber gold nanofilm saturable absorber.
Main Results:
- Reduced nonlinear absorption coefficient by 40.4% and refractive index by 33.1% via voltage control.
- Demonstrated reversible wavelength-tuning and switching between mode-locking and Q-switched mode-locking regimes.
- Showcased the functionality in mode-locked fiber lasers.
Conclusions:
- Electrically controlled nonlinear optical responses in gold nanofilms are achievable.
- Offers a flexible method for dynamic control of fiber laser operations.
- Advances understanding and application of tunable plasmonics.
