skip to main content

SciTech ConnectSciTech Connect

Title: Broadband enhancement of local density of states using silicon-compatible hyperbolic metamaterials

Light emitting silicon quantum dots by colloidal synthesis were uniformly spin-coated into a 20 nm-thick film and deposited atop a hyperbolic metamaterial of alternating TiN and SiO{sub 2} sub-wavelength layers. Using steady-state and time-resolved photoluminescence spectroscopy as a function of the emission wavelength in partnership with rigorous electromagnetic modeling of dipolar emission, we demonstrate enhanced Local Density of States and coupling to high-k modes in a broad spectral range. These findings provide an alternative approach for the engineering of novel Si-compatible broadband sources that leverage the control of radiative transitions in hyperbolic metamaterials and the flexibility of the widespread Si platform.
Authors:
; ;  [1] ;  [1] ;  [2] ;  [3] ;  [1] ;  [4]
  1. Department of Electrical and Computer Engineering and Photonics Center, Boston University, 8 Saint Mary's Street Boston, Massachusetts 02215 (United States)
  2. (Japan)
  3. Department of Electrical and Electronic Engineering, Graduate School of Engineering, Kobe University, Rokkodai, Nada, Kobe 657-8501 (Japan)
  4. (United States)
Publication Date:
OSTI Identifier:
22483061
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 24; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; DENSITY OF STATES; FILMS; METAMATERIALS; PHOTOLUMINESCENCE; QUANTUM DOTS; SILICON; SILICON OXIDES; SIMULATION; SPECTROSCOPY; TIME RESOLUTION; TITANIUM NITRIDES; WAVELENGTHS