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Diffraction Optics of Complex-Structured Periodic Media: Localized Optical Modes of Spiral Media

Diffraction Optics of Complex-Structured Periodic Media: Localized Optical Modes of Spiral Media

Hardcover

Series: Springer Optical Sciences, Book 203

Technology & EngineeringPhysics

ISBN10: 3319434810
ISBN13: 9783319434810
Publisher: Springer Nature
Published: Aug 15 2019
Pages: 253
Weight: 1.24
Height: 0.69 Width: 6.14 Depth: 9.21
Language: English

This book presents recent theoretical and experimental results of localized optical modes and low-threshold lasing in spiral photonic media. Efficient applications of localized modes for low-threshold lasing at the frequencies of localized modes are a central topic of the book's new chapters. Attention is paid to the analytical approach to the problem. The book focuses on one of the most extensively studied media in this field, cholesteric liquid crystals. The chosen model, in the absence of dielectric interfaces, allows to remove the problem of polarization mixing at surfaces, layers and defect structures. It allows to reduce the corresponding equations to the equations for light of diffracting polarization only. The problem concentrates then on the edge and defect optical modes. The possibility to reduce the lasing threshold due to an anomalously strong absorption effect is presented theoretically for distributed feedback lasing. It is shown that a minimumof the threshold-pumping wave intensity can be reached for the pumping wave frequency coinciding with the localized mode frequency (what can be reached for a pumping wave propagating at a certain angle to the helical axes). Analytic expressions for transmission and reflection coefficients are presented.

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