Phonon Recycling in Photonics

0966229 Kavian本研究调查在固态设备中能量转换过程中产生的热量如何在浪费之前被回收，从而使能量转换过程更有效率。例如，(A)产生或使用光子的设备以及(B)用于现代通信、诊断和高功率应用的设备，例如稀土掺杂的固态激光器和发光二极管。目前，这些光子器件中产生的过量热量限制了它们的效率和更广泛的实现。在这项研究中，声子回收，即利用发射的声子来辅助光子发射过程，以缓解过度加热，提高光子效率。智能优点：声子回收是热系统原子级设计的一种新方法。为了预测利用声子循环的器件的性能，将采用一种解释载流子布居不平衡的量子力学方法。该理论将把目前以电子-光子为主的输运图景转变为以声子为导向的观点，从而消除历史上限制对这类系统中基本现象的理解的障碍。更广泛的影响：该研究将与原子级热传输研究和教育的持续发展相结合。除了国际宣传外，还将开发维基百科(在线百科全书)中的热传递物理条目，以培训和教育国际受众有关声子、电子、流体粒子和光子传输的主题。

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.