First experimental results of nonlinear, thin film interference filter wedges with mixed CdSxSe1−x as spacer material at the 633 nm wavelength of He–Ne laser are reported. Optical bistability is observed with less than 7.5 mW of optical power in single‐cavity structures. The change in refractive index is found to be positive which is in accordance with the thermal mechanism of nonlinearity. Producing a double‐cavity structure a device is obtained which works as an optical astable multivibrator having periodical change of transmission as the function of time.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics