What is the Temporal Analog of Reflection and Refraction of Optical Beams? | Zendy

Brent W. Plansinis | Zendy; William R. Donaldson | Zendy; Govind P. Agrawal | Zendy

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What is the Temporal Analog of Reflection and Refraction of Optical Beams?

Author(s) -

Brent W. Plansinis,

William R. Donaldson,

Govind P. Agrawal

Publication year - 2015

Publication title -

physical review letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.688

H-Index - 673

eISSN - 1079-7114

pISSN - 0031-9007

DOI - 10.1103/physrevlett.115.183901

Subject(s) - refraction , reflection (computer programming) , optics , physics , refractive index , pulse (music) , dispersion (optics) , boundary (topology) , boundary value problem , total internal reflection , total external reflection , mathematical analysis , mathematics , quantum mechanics , detector , computer science , programming language

It is shown numerically and analytically that when an optical pulse approaches a moving temporal boundary across which the refractive index changes, it undergoes a temporal equivalent of reflection and refraction of optical beams at a spatial boundary. The main difference is that the role of angles is played by changes in the frequency. The frequency dependence of the dispersion of the material in which the pulse is propagating plays a fundamental role in determining the frequency shifts experienced by the reflected and refracted pulses. Our analytic expressions for these frequency shifts allow us to find the condition under which an analog of total internal reflection may occur at the temporal boundary.

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