Accession Number : ADA595078


Title :   Miniaturization and Optimization of Nanoscale Resonant Oscillators


Descriptive Note : Final rept. 1 Jul 2007-3 Mar 2013


Corporate Author : CALIFORNIA UNIV SAN DIEGO LA JOLLA


Personal Author(s) : Fainman, Y ; Tu, C ; Lomakin, V ; Slutsky, B ; Nezhad, M


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA595078


Report Date : 07 Sep 2013


Pagination or Media Count : 55


Abstract : Current microscale semiconductor laser resonators may attain small modal volumes but require structures that are large compared to the wavelength, such as photonic crystals [11] or Bragg mirrors [12]. Metallic coatings provide stronger confinement of light and consequently higher device-packing density and therefore have been proposed for reducing the size of semiconductor nanowire lasers [13, 14]. The drawback of using metals, however, is their high dissipation losses at optical frequencies. Lasing in three-dimensional (3D) subwavelength metal-coated cavities operating at cryogenic temperatures to reduce the dissipation losses in the metal and increase the gain in the semiconductor has been reported [8]. We show that the losses in metal coated gain waveguides, as well as 3D laser resonators, can be significantly reduced by introducing a low index shield layer between the gain medium and the metal.


Descriptors :   *OSCILLATORS , CAVITIES , LASERS , METAL COATINGS , MIRRORS , NANOWIRES , PHOTONIC CRYSTALS , RESONANCE , RESONATORS , SEMICONDUCTORS , THREE DIMENSIONAL , WAVEGUIDES


Subject Categories : Electrical and Electronic Equipment


Distribution Statement : APPROVED FOR PUBLIC RELEASE