Phonon Recycling in Photonics

0966229 kaviany本研究探讨的是如何在固态器件能量转换过程中产生的热量被浪费之前进行回收，从而使能量转换过程更加高效。例子包括(a)产生或使用光子的器件和(b)用于现代通信、诊断和高功率应用（如稀土掺杂固体激光器和发光二极管）的器件。目前，在这些光子器件中产生的多余热量限制了它们的效率和更广泛的应用。在本研究中，声子回收利用发射的声子辅助光子发射过程，以减轻过热和提高光子效率。知识优势：声子回收是一种原子级热系统设计的新方法。为了预测利用声子循环的设备的性能，将采用量子力学方法来解释能量载流子种群的非平衡。该理论将把当前电子-光子主导的输运图景转变为声子导向的观点，从而消除了历史上限制对这类系统基本现象理解的障碍。更广泛的影响：该研究将与原子水平传热研究和教育的持续发展相结合。除了国际推广外，维基百科（在线百科全书）中的传热物理学条目将被开发，以培训和教育涉及声子，电子，流体粒子和光子传输的主题的国际观众。

0966229KavianyThis research investigates how heat that is generated during energy conversion in a solid state device can be recycled before it becomes wasted, thus make the energy conversion process more efficient. Examples include devices that both (a) produce or use photons and (b) are employed in modern communications, diagnostics, and high-power applications such as the rare-earth doped solid-state lasers and light-emitting diodes. Currently, excess heat that is generated in these photonic devices has limited both their efficiency and their broader implementation. In this research, phonon recycling, which uses emitted phonons to assist in the photon emission process, is employed to alleviate excess heating and improve photonic efficiency. Intellectual Merit: Phonon recycling is a new approach to the atomic-level design of thermal systems. A quantum mechanical approach that accounts for energy carrier population nonequilibra will be taken in order to predict the performance of devices that utilize phonon recycling. The theory will convert the current picture of electron-photon dominated transport to a phonon-oriented view, thus removing barriers that have historically limited the understanding of the fundamental phenomena in such systems.Broader Impact: The research will be integrated with the continued development of atomic-level heat transfer research and education. In addition to international outreach, a Heat Transfer Physics entry in Wikipedia (the online encyclopedia) will be developed to train and educate an international audience on topics involving phonon, electron, fluid particle, and photon transport.