- Speaker: Prof. Park, Hong-Gyu (Korea Univ)
- Date: Tuesday December 6, 2016
In this talk, I want to present research progress in my group, including current-injection nanolasers, plasmonic lasers/tweezers, and nanowire photovoltaics/sensors. First, electrically driven photonic crystal lasers [1] and graphene-contact microdisk lasers [2] will be introduced. Second, I will talk about an optically pumped silver-nanopan plasmonic laser with a subwavelength mode volume [3] and low-power nano-optical vortex trapping using plasmonic resonance in gold diabolo nanoantennas [4]. Finally, I will present single-crystalline silicon nanowire photovoltaic devices [5]. Synthesis control of nanowires for enhanced light absorption [6] and a new nanowire platform for one-dimensional bioprobes [7] will also be introduced. I believe that our progress in demonstrating subwavelength nanophotonic devices represents an important step toward fast all-optical processing in an ultra-compact photonic integrated circuit.
[1] K.-Y. Jeong et al., “Electrically driven nanobeam laser,” Nature Commun. 4, 2822 (2013).
[2] Y.-H. Kim et al., “Graphene-contact electrically driven microdisk lasers,” Nature Commun. 3, 1123 (2012).
[3] S.-H. Kwon et al., “Subwavelength plasmonic lasing from a semiconductor nanodisk with silver nanopan cavity,” Nano Lett. 10, 3679 (2010).
[4] J.-H. Kang et al., “Low-power nano-optical vortex trapping via plasmonic diabolo nanoantennas,” Nature Commun. 2, 582 (2011).
[5] S.-K. Kim et al., “Tuning light absorption in core/shell silicon nanowire photovoltaic devices through morphological design,” Nano Lett. 12, 4971 (2012).
[6] R. Day et al., “Plateau-Rayleigh crystal growth of periodic shells on one-dimensional substrates,” Nature Nanotechnol. 10, 345 (2015).
[7] Y.-S. No et al., “Encoding active device elements at nanowire tips,” Nano Lett. 16, 4713 (2016).