16 September 2016 A single dielectric nanolaser
Author Affiliations +
Abstract
To conquer Ohmic losses from metal and enhance pump absorption efficiency of a nanolaser based on surface plasmon polariton, we theoretically calculate the first magnetic and electric scattering coefficient of a dielectric sphere under a plane wave excitation with a dielectric constant of around 12. From this calculation, we could retrieve both negative effective permittivity and permeability of the sphere simultaneously at frequencies around 153 THz in the aids of Lewin’s theory and the power distribution clearly demonstrate the expected negative Goos-Hänchen effect, which usually occurred in a negative refractive waveguide, thus creating two energy vortices to trap incident energy and then promoting the pump absorption efficiency. Meanwhile, a magnetic lasing mode at 167.3 THz is demonstrated and reveals a magnetic dipole resonance mode and a circulating energy flow within the dielectric sphere, providing a possible stopped light feedback mechanism to enable the all-dielectric nanolaser. More importantly, the corresponding mode volume is reduced to 0.01λ3 and a gain threshold of 5.1×103 is obtained. To validate our design of all-dielectric nanolaser, we employ finite-difference-time-domain simulation software to examine the behavior of the nanolaser. From simulation, we could obtain a pinned-down population inversion of 0.001 and a lasing peak at around 166.5 THz, which is very consistent with the prediction of Mie theory. Finally, according to Mie theory, we can regard the all-dielectric nanolaser as the excitation of material polariton and thus could make an analogue between lasing modes of the dielectric and metallic nanoparticles.
Conference Presentation
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Tsung-Yu Huang, Tsung-Yu Huang, Ta-Jen Yen, Ta-Jen Yen, } "A single dielectric nanolaser", Proc. SPIE 9918, Metamaterials, Metadevices, and Metasystems 2016, 99180V (16 September 2016); doi: 10.1117/12.2237437; https://doi.org/10.1117/12.2237437
PROCEEDINGS
6 PAGES + PRESENTATION

SHARE
RELATED CONTENT

Scattering in THz imaging
Proceedings of SPIE (November 04 2005)
Scattering from chiral composites
Proceedings of SPIE (April 16 1998)
An all-dielectric route for terahertz cloaking
Proceedings of SPIE (May 06 2008)

Back to Top