Youngmin Kim

TL;DR: In this article, the authors presented a 1D photonic crystal nanobeam with a very small device footprint of 7 μm2 and a compact active area of ∼1.2 μm.

TL;DR: In this paper, the authors used time-resolved infrared pump-probe spectroscopy to study the effect of pseudo-magnetic fields on the optical properties of periodically strained graphene.

TL;DR: In this paper, a strain-free GeSn microdisk laser device fully released on Si outperforms the canonical suspended devices, allowing to simultaneously relax the limiting compressive strain while offering excellent thermal conduction.

TL;DR: This work presents a novel crossbeam structure with an embedded optical cavity that allows both a relatively high and fairly uniform biaxial strain in addition to a high-quality factor of >4,000 simultaneously, which opens up the possibility of further improving the performance of germanium lasers by harnessing geometrically amplified biaXial strain.

TL;DR: In this article, a dual insulator GeSn-on-insulator (GeSnOI) material platform was developed to produce strain-relaxed GeSn microdisks stuck on a substrate.