Ferrara Maria Antonietta, Sirleto Luigi
National Research Council (CNR), Institute of Applied Sciences and Intelligent Systems, Via Pietro Castellino 111, 80131 Naples, Italy.
Micromachines (Basel). 2020 Mar 23;11(3):330. doi: 10.3390/mi11030330.
Important accomplishments concerning an integrated laser source based on stimulated Raman scattering (SRS) have been achieved in the last two decades in the fields of photonics, microphotonics and nanophotonics. In 2005, the first integrated silicon laser based upon SRS was realized in the nonlinear waveguide. This breakthrough promoted an intense research activity addressed to the realization of integrated Raman sources in photonics microstructures, like microcavities and photonics crystals. In 2012, a giant Raman gain in silicon nanocrystals was measured for the first time. Starting from this impressive result, some promising devices have recently been realized combining nanocrystals and microphotonics structures. Of course, the development of integrated Raman sources has been influenced by the trend of photonics towards the nano-world, which started from the nonlinear waveguide, going through microphotonics structures, and finally coming to nanophotonics. Therefore, in this review, the challenges, achievements and perspectives of an integrated laser source based on SRS in the last two decades are reviewed, side by side with the trend towards nanophotonics. The reported results point out promising perspectives for integrated micro- and/or nano-Raman lasers.
在过去二十年里，在光子学、微光子学和纳米光子学领域，基于受激拉曼散射（SRS）的集成激光源取得了重要成果。2005年，首个基于SRS的集成硅激光器在非线性波导中实现。这一突破推动了针对在微腔和光子晶体等光子学微结构中实现集成拉曼源的密集研究活动。2012年，首次测量到硅纳米晶体中的巨大拉曼增益。基于这一令人印象深刻的结果，最近实现了一些将纳米晶体与微光子学结构相结合的有前景的器件。当然，集成拉曼源的发展受到光子学向纳米世界发展趋势的影响，这一趋势从非线性波导开始，历经微光子学结构，最终走向纳米光子学。因此，在本综述中，回顾了过去二十年基于SRS的集成激光源的挑战、成就和前景，同时也探讨了向纳米光子学发展的趋势。所报道的结果指出了集成微拉曼激光器和/或纳米拉曼激光器的前景。
