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Optical-fibre scanning near-field optical microscope for cryogenic operation
T Tokizaki1, K Sugiyama, T Onuki
1Electrotechnical Laboratory, Tsukuba, Ibaraki, Japan. tokizaki@etl.go.jp
Journal of Microscopy
|June 5, 2001
Summary
A novel fiber-optic scanning near-field optical microscope (SNOM) offers a compact, vibration-resistant design. This advanced SNOM simplifies cryostat integration and optical alignment for enhanced performance.
Area of Science:
- Optics
- Microscopy
- Materials Science
Background:
- Scanning near-field optical microscopy (SNOM) is crucial for high-resolution imaging.
- Conventional SNOM systems can be bulky and sensitive to environmental vibrations.
- Integration into specialized environments like cryostats presents challenges.
Purpose of the Study:
- To develop a more compact and robust SNOM system.
- To improve the ease of use and integration of SNOM technology.
- To overcome limitations of existing SNOM designs, particularly in cryostat applications.
Main Methods:
- Utilized optical fibers for both probe control and signal collection.
- Implemented shear force feedback using a fiber interferometer for precise tip positioning.
- Designed a direct signal collection pathway using a multimode fiber.
Main Results:
- Achieved a significantly more compact SNOM head.
- Demonstrated reduced sensitivity to vibrations compared to conventional systems.
- Eliminated the need for optical windows in cryostats.
- Facilitated easier optical alignment procedures.
Conclusions:
- The fiber-optic SNOM represents a significant advancement in microscopy technology.
- Its compact and robust design broadens the applicability of SNOM, especially in demanding environments.
- This new SNOM design simplifies experimental setups and enhances operational stability.
