Chris Chase

EE235

4/9/07

Chris Chase, EE235 2

Introduction

Nanowire Lasers Applications

Potential solution for a laser integrated on silicon

Nanowires act as a natural laser cavity Nanowire facets act as mirrors Nanowire itself guides light This makes a nanowire a natural Fabry-Perot Cavity

Chris Chase, EE235 3

Fabrication Process

Deposit Poly(9,9-dioctylfluorene) (PFO) on glass substrate

Place against porous alumina membrane Anneal for 2 hrs at 250 C, where polymer melts into

holes in membrane Dissolve membrane in NaOH Resulting nanowires are generally between 250 and

350 nm in diameter and on average 6 µm in length Nanowires have a PL peak at ~460 nm, which is

similar to the bulk PL.

Chris Chase, EE235 4

Material Characterization

Chris Chase, EE235 5

Waveguiding

Scale bar is 5 µm

Calculations show that ~85% of fundamental mode should be confined

Chris Chase, EE235 6

Cavity Characteristics

Chris Chase, EE235 7

Lasing Characteristics

Chris Chase, EE235 8

Questions?