Transcript MSSI introduction

Manipulating the optical properties of
semiconductor nanostructures for
integrated plasmonic applications
Dr. Ning Liu
Materials & Surface Science Institute
Department of Physics & Energy
University of Limerick
Oct 26th, 2015 KITPC, Beijing
Outline
• Integrated Plasmonics
 Introduction
 Top-down approaches to micro(nano)lasers and amplifiers.
 Bottom-up approach to plasmonic
waveguides, lasers, and logic circuits
Integrated Photonics
Why using light to process information?
• Faster
• Larger capacity (with different wavelength)
How light can be integrated on a chip ?
Here at UL, we work
on:
• Material growth
• Device fabrication
• Integration
From Intel
Further reduce the size of optical devices
Surface plasmons (SPs), are coherent electron oscillations that
exist at the interface between any two materials where the real part
of the dielectric function changes sign across the interface (e.g. a
metal-dielectric interface).
Usually, the excitation of surface plasmons by light is denoted as:
• localized surface plasmon resonance (LSPR) for nanometer-sized
metallic structures;
• surface plasmon resonance (SPR) for waveguided structures.
J. Henzie et al. Annu. Rev. Phys. Chem. 60, 147 (2009).
Plasmonic lasers
M. A. Noginov et al., Nature 2009 460, 1110.
Ren-min Ma et al., Nature Materials 2011 10, 110.
Y-J. Lu et al., Science 2012 337, 450.
Rupert F. Oulton et al., Nature 2009 461, 629.
Hybrid plasmonic amplifiers from CdSe
NBs using ‘pump-probe’ setup
Liu, et al. Scientific Reports, 2013 3, 1967.
Giant optical gain:
g = 6755 cm-1
Photonic waveguide
Why is the gain
threshold is so low?
Current as a function of
applied voltage across the
Ag-Al2O3-Ag junction
Can we synthesize metal-semiconductor
core-shell waveguides?
Applications
Probe tip Incorporation in
Various Microscope Techniques,
Drug Delivery in Cells
http://www.amscope.com
Neil R. et al, Nature
Nanotechnology, 4,
483-491, 2009
Ed. Nicoleta Lupu,
Electrodeposited Nanowire and
Their Applications, pp. 222, 2010
Can we control better the
attachment of semiconductor
material to the substrate ?
12 of 23
Can we use top-down approach
to obtain plasmonic waveguides,
lasers, amplifier, and logic
units?
13 of 32
Summary
• Integrated Plasmonics
 Top-down approaches
 Bottom-up approach
Prof. Hongxing Xu
Prof. Hong Wei
Dr. Jing Li
Dr. Xiaorui Tian
Mr. Zhuoxian Wang
Prof. Anlian Pan
Dr. Christophe Silien (UL)
Dr. Tofail Syed (UL)
Dr. Kevin M. Ryan (UL)
Ms. Pai Liu (UL)
Ms. Isabel Pita (UL)
Mr. Matthew Gleeson (UL)
Dr. Yina Guo (UL)
Dr. Brian Corbett (Tyndall)
Prof. Martyn Pemble (Tyndall)