Nonlinear Optics with a Micrometer-Size Droplet
Nonlinear optical effects in extended three-dimensional media are sufficiently well known that in textbooks they are commonly treated using plane waves that can grow or deplete along the propagation direction. When two of the dimensions are decreased to micrometer size while the third dimension remains extended, as in the case of propagation along an optical fiber, large nonlinear optical phenomena can occur because total internal reflection can maintain a high electric field intensity over many meters along the fiber.
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