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Mode tailoring in subwavelength-dimensional semiconductor micro/nanowaveguides by coupling optical microfibers
Optics Express
|November 10, 2016
Summary
Mode tailoring in semiconductor micro/nanowaveguides (MN-WGs) was achieved by coupling optical silica microfibers. This method allows for reversible tuning of interference wavelengths, enabling applications in miniature lasers and sensors.
Area of Science:
- Optics and Photonics
- Materials Science
- Nanotechnology
Background:
- Subwavelength-dimensional semiconductor micro/nanowaveguides (MN-WGs) are crucial for miniaturized optical devices.
- Controlling light propagation and interference within these waveguides is essential for advanced functionalities.
Purpose of the Study:
- To achieve mode tailoring in semiconductor MN-WGs by coupling with optical silica microfibers.
- To demonstrate tunable interference wavelengths and explore sensing applications.
Main Methods:
- Coupling optical silica microfibers to semiconductor MN-WGs.
- Investigating reflection spectra to analyze interference patterns.
- Utilizing microfiber tip contact points for wavelength tuning.
Main Results:
- Effective reflection and continuous, reversible tuning of interference wavelengths were achieved.
- A high extinction ratio of approximately 10 dB was measured.
- Tunable free spectral range of photoluminescence and humidity sensing were demonstrated.
Conclusions:
- The developed method offers non-destructive tuning, simple fabrication, and remote monitoring capabilities.
- This technique shows significant potential for developing miniature tunable lasers, sensors, and biological endoscopy devices.
