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Second-harmonic generation in thermally poled chalcohalide glass.
Ren Jing1, Yang Guang, Zeng Huidan
1Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology, Shanghai, China.
Optics Letters
|November 14, 2006
Summary
Second-harmonic generation was observed in chalcohalide glass containing alkali ions. This material exhibits a high nonlinear susceptibility, showing potential for optical waveguide devices.
Area of Science:
- Materials Science
- Nonlinear Optics
- Glass Science
Background:
- Chalcohalide glasses are promising materials for optical applications.
- Alkali ions can influence the nonlinear optical properties of glasses.
- Thermal poling is a common method to induce second-order nonlinear susceptibility.
Purpose of the Study:
- To investigate second-harmonic generation in a specific chalcohalide glass composition.
- To determine the nonlinear susceptibility of the poled glass.
- To explore the potential of alkali-containing chalcohalide glasses for optical devices.
Main Methods:
- Preparation of 60GeS(2)-20Ga(2)S(3)-20KBr chalcohalide glass.
- Thermal poling treatment of the glass sample.
- Maker fringe analysis to measure second-order nonlinear susceptibility.
Main Results:
- A significant second-order nonlinear susceptibility of 7.0 pm/V was achieved.
- A clear second-harmonic wave was successfully observed.
- This is the first observation in chalcohalide glasses with a high alkali ion content (6.25 at. %).
Conclusions:
- The investigated chalcohalide glass exhibits strong nonlinear optical properties.
- The presence of alkali ions is crucial for achieving second-harmonic generation.
- These materials hold great potential for the development of all-optical waveguide devices.
