Journal
OPTICA
Volume 3, Issue 3, Pages 233-238Publisher
OPTICAL SOC AMER
DOI: 10.1364/OPTICA.3.000233
Keywords
-
Categories
Funding
- Air Force Office of Scientific Research (AFOSR) [FA9550-14-1-0389]
- Army Research Office through the Institute for Soldier Nanotechnologies [W911NF-13-D-0001]
- National Science Foundation (NSF) [DGE1144152]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1454836] Funding Source: National Science Foundation
Ask authors/readers for more resources
We describe a novel approach based on topology optimization that enables automatic discovery of wavelength-scale photonic structures for achieving high-efficiency second-harmonic generation (SHG). A key distinction from previous formulation and designs that seek to maximize Purcell factors at individual frequencies is that our method aims to not only achieve frequency matching (across an entire octave) and large radiative lifetimes, but also optimizes the equally important nonlinear-coupling figure of merit (beta) over bar, involving a complicated spatial overlap-integral between modes. We apply this method to the particular problem of optimizing micropost and grating-slab cavities (one-dimensional multilayered structures) and demonstrate that a variety of material platforms can support modes with the requisite frequencies, large lifetimes Q > 10(4), small modal volumes similar to(lambda/n)(3), and extremely large (beta) over bar 10(-2), leading to orders of magnitude enhancements in SHG efficiency compared to state-of-the-art photonic designs. Such giant (beta) over bar alleviate the need for ultranarrow linewidths and thus pave the way for wavelength-scale SHG devices with faster operating timescales and higher tolerance to fabrication imperfections. (C) 2016 Optical Society of America
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available