Optical bistability
In
feedback mechanism, e.g. a laser, provide two methods of achieving bistability
.
- Absorptive bistability utilizes an absorber to block light inversely dependent on the intensity of the source light. The first bistable state resides at a given intensity where no absorber is used. The second state resides at the point where the light intensity overcomes the absorber's ability to block light.
- Refractive bistability utilizes an optical mechanism that changes its refractive index inversely dependent on the intensity of the source light. The first bistable state resides at a given intensity where no optical mechanism is used. The second state resides at the point where a certain light intensity causes the light to resonate to the corresponding refractive index.
This effect is caused by two factors
- Nonlinear atom-field interaction
- Feedback effect of mirror
Important cases that might be regarded are:
- Atomic detuning
- Cooperating factor
- Cavity mistuning
Applications of this phenomenon include its use in optical transmitters, memory elements and pulse shapers.
Optical bistability was first observed within vapor of sodium during 1974.[1]
Intrinsic bistability
When the feedback mechanism is provided by an internal procedure (not by an external entity like the mirror within the
nanoparticles through which the effect of surface plasmon resonance can potentially occur.[3]
References
- ISBN 978-0122819407. Retrieved June 16, 2021.
- ^ Goldstone, J. A., and E. Garmire. "Intrinsic optical bistability in nonlinear media". Physical review letters 53.9 (1984): 910. https://doi.org/10.1103/PhysRevLett.53.910
- ^ Sharif, Morteza A., et al. "Difference Frequency Generation-based ultralow threshold Optical Bistability in graphene at visible frequencies, an experimental realization". Journal of Molecular Liquids 284 (2019): 92–101. https://doi.org/10.1016/j.molliq.2019.03.167
- Guangsheng He; Song H. Liu (1999). Physics of Nonlinear Optics. World Scientific. pp. 422–. ISBN 978-981-02-3319-8.