全介质纳米激光器实现亚纳米级场约束
All-Dielectric Nanolaser with Subnanometer Field Confinement
AI总结：
本文提出一种全介质纳米激光器，通过耦合CdS纳米线对中的1纳米狭缝实现亚纳米级（0.23纳米）场约束，规避了等离激元激光器的约束-损耗权衡，为纳米激光器开辟新方向。
摘要：
产生具有超紧空间约束的激光场对于推动光学科学与技术的极限具有重要意义。尽管等离激元激光器能够提供亚衍射约束的激光场，但其受到光学约束与金属中自由电子振荡损耗之间权衡的限制。我们在此展示了一种全介质纳米激光器，能够规避约束-损耗权衡，并提供低至亚纳米级别的场约束。这种超约束激光场由耦合的CdS纳米线对中1纳米宽狭缝周围的极化束缚电子的低损耗振荡所支持，表现为约520纳米波长处类TE0激光模式的主导峰，场约束低至0.23纳米，峰背比约为32.7分贝。该激光器可能为纳米激光器和光-物质相互作用开辟新的领域。
英文摘要：
The ability to generate a laser field with ultratight spatial confinement is important for pushing the limit of optical science and technology. Although plasmon lasers can offer sub-diffraction-confined laser fields, it is restricted by a trade-off between optical confinement and loss of free-electron oscillation in metals. We show here an all-dielectric nanolaser that can circumvent the confinement-loss trade-off, and offer a field confinement down to subnanometer level. The ultra-confined lasing field, supported by low-loss oscillation of polarized bound electrons surrounding a 1-nm-width slit in a coupled CdS nanowire pair, is manifested as the dominant peak of a TE0-like lasing mode around 520-nm wavelength, with a field confinement down to 0.23 nm and a peak-to-background ratio of ~32.7 dB. This laser may pave a way towards new regions for nanolasers and light-matter interaction.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
