TY - JOUR
T1 - Band-edge engineering for controlled multi-modal nanolasing in plasmonic superlattices
AU - Wang, Danqing
AU - Yang, Ankun
AU - Wang, Weijia
AU - Hua, Yi
AU - Schaller, Richard D.
AU - Schatz, George C.
AU - Odom, Teri W.
N1 - Funding Information:
This work was supported by the National Science Foundation (NSF) under DMR-1608258 and DMR-1306514 (D.W., A.Y., W.W., G.C.S., T.W.O.). This work made use of the Northwestern University Micro/Nano Fabrication Facility (NUFAB), which is supported by the State of Illinois and Northwestern University. This work made use of the EPIC facility of the Northwestern University’s Atomic and Nanoscale Characterization Experimental Center (NUANCE), which has received support from the Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource (NSF NNCI-1542205); the MRSEC programme (NSF DMR-1121262) at the Materials Research Center; the International Institute for Nanotechnology (IIN); the Keck Foundation; and the State of Illinois, through the IIN. Use of the Center for Nanoscale Materials, an Office of Science user facility, was supported by the US Department of Energy, Office of Science, Office of Basic Energy Sciences, under contract no. DE-AC02-06CH11357. This research was supported in part by the Quest high performance computing facility at Northwestern University, which is jointly supported by the Office of the Provost, the Office for Research, and Northwestern University Information Technology.
PY - 2017/9/1
Y1 - 2017/9/1
N2 - Single band-edge states can trap light and function as high-quality optical feedback for microscale lasers and nanolasers. However, access to more than a single band-edge mode for nanolasing has not been possible because of limited cavity designs. Here, we describe how plasmonic superlattices - finite-arrays of nanoparticles (patches) grouped into microscale arrays - can support multiple band-edge modes capable of multi-modal nanolasing at programmed emission wavelengths and with large mode spacings. Different lasing modes show distinct input-output light behaviour and decay dynamics that can be tailored by nanoparticle size. By modelling the superlattice nanolasers with a four-level gain system and a time-domain approach, we reveal that the accumulation of population inversion at plasmonic hot spots can be spatially modulated by the diffractive coupling order of the patches. Moreover, we show that symmetry-broken superlattices can sustain switchable nanolasing between a single mode and multiple modes.
AB - Single band-edge states can trap light and function as high-quality optical feedback for microscale lasers and nanolasers. However, access to more than a single band-edge mode for nanolasing has not been possible because of limited cavity designs. Here, we describe how plasmonic superlattices - finite-arrays of nanoparticles (patches) grouped into microscale arrays - can support multiple band-edge modes capable of multi-modal nanolasing at programmed emission wavelengths and with large mode spacings. Different lasing modes show distinct input-output light behaviour and decay dynamics that can be tailored by nanoparticle size. By modelling the superlattice nanolasers with a four-level gain system and a time-domain approach, we reveal that the accumulation of population inversion at plasmonic hot spots can be spatially modulated by the diffractive coupling order of the patches. Moreover, we show that symmetry-broken superlattices can sustain switchable nanolasing between a single mode and multiple modes.
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U2 - 10.1038/nnano.2017.126
DO - 10.1038/nnano.2017.126
M3 - Article
C2 - 28692060
AN - SCOPUS:85029080017
VL - 12
SP - 889
EP - 894
JO - Nature Nanotechnology
JF - Nature Nanotechnology
SN - 1748-3387
IS - 9
ER -