LDRD Seminar Series: ‘Hybrid Silicon Nanolasers or: Teaching an Old Dog New 2D Material Tricks’
Note: This week’s LDRD seminar will be held in Building 241, Room A323
Argonne Scholar Chad Husko (NST) will discuss his Laboratory-Directed Research and Development (LDRD) sponsored work at the LDRD Seminar Series presentation Tuesday, Oct. 17, 2017. “Hybrid Silicon Nanolasers or: Teaching an Old Dog New 2D Material Tricks” begins at 12:30 p.m. in Building 241, Room A323. All are welcome to attend.
Silicon is the one of the most earth-abundant and well-studied materials on the planet. Our deep understanding of the electronic properties of silicon underpinned the information technology revolution of the 20th century, leading to today’s ubiquitous computational power in mobile phones and data centers. The rise of silicon photonics the past decade is driving a push to reach a deeper understanding of silicon’s optical properties with the goal of integrating optical and electronic components in a single material platform.
While silicon has excellent electrical properties, its optical properties have proven much more challenging to master. Despite immense progress in the understanding of material properties and devices for silicon photonics, several key components remain elusive, including a silicon laser.
In this talk, Husko will describe the recent results demonstrating lasing in a hybrid nanomaterial composed of silicon and a two-dimensional phosphorene film (BP). Due to the few nanometer thickness of the BP emitter layer, this hybrid system behaves as a single material as seen by the optical field. We obtain single-mode lasing in the main telecommunications band of 1.55 μm (Eg = 0.8 eV) under continuous wave (CW) optical excitation at room temperature. The chemically-exfoliated BP film, comprised of many BP flakes, enables the demonstration of lasing across a broad range of emission wavelengths, and highlights the versatility of the Si-BP material platform for creating novel optically-active devices in integrated silicon chips.
This project was supported in part through the France-Chicago Center FACCTS Program (France and Chicago Collaborating in the Sciences) at the University of Chicago.
Chad Husko received his Ph.D. in applied physics from Columbia University in 2010. While a Fulbright Scholar in 2007-2008, he was a guest researcher at Thales Research & Technology in Paris, France. In 2011 he moved to the University of Sydney, where he was a DECRA fellow (Discovery Early Career Research Award) of the Australian Research Council. He is currently the Alexei Abrikosov Fellow in the Center for Nanoscale Materials (CNM). In 2016, Husko represented the Optical Society (OSA) as an ambassador and in 2017 was elected an OSA Senior Member. His research focuses on the physics of nanoscale light-matter interaction, and hybrid nanophotonic 2D materials and devices.