I am an engineer-entrepreneur and the Founder and CEO of Simpetus, a startup advancing electromagnetic design with open source and cloud computing. Simpetus is a portmanteau of simulations and impetus which references our vision for simulations being an impetus for new discoveries and technologies. These seminar slides provide a summary of my work along with this colloquium lecture.
I received a Sc.D. from MIT where I worked with Professors Steven G. Johnson and John D. Joannopoulos (thesis: Computation & Design for Nanophotonics) to develop the open-source software package MEEP. I have a masters in Computation for Design and Optimization from MIT and completed my undergraduate, with honors, in Engineering Science at the University of Toronto. Prior to launching Simpetus, I worked with Professors Susumu Noda at Kyoto University and Stephen R. Forrest at the University of Michigan.
My research focus has been to pioneer advances in computational electromagnetics to enable new kinds of nanostructured optoelectronic devices. In particular, for solar-energy applications, I demonstrated together with experiments how a tandem partially-disordered silicon photonic-crystal thin film can overcome, for the first time, the well-known Lambertian light-trapping limit. For organic light-emitting diodes (OLEDs), I showed how both the light-extraction efficiency and the spontaneous-emission rate of the excitons can be increased in a single design for displays and solid-state lighting.
academic research summary: 1 book + 13 first-author journal publications, 2500+ citations
A. Taflove, A. Oskooi, and S.G. Johnson, Advances in FDTD Computational Electrodynamics: Photonics and Nanotechnology, Boston: Artech (2013). [670 pages, Hardcover & Kindle formats: Amazon, B&N]
A. Oskooi, "Texturing the cathode of white organic light-emitting diodes with a lattice of nanoscale scatterers for enhanced light out-coupling,'' Applied Physics Letters, 106, 041111 (2015). [additional data for blue OLEDs]
A. Panda, C.K. Renshaw, A. Oskooi, K. Lee, and S.R. Forrest, "Excited state and charge dynamics of hybrid organic/inorganic heterojunctions. II. Experiment,'' Physical Review B, 90, 045303 (2014).
A. Oskooi, M. De Zoysa, K. Ishizaki, and S. Noda, "Experimental demonstration of quasi-resonant absorption in silicon thin films for enhanced solar light trapping,'' ACS Photonics, 1, pp. 304-309 (2014).
A. Oskooi, Y. Tanaka, and S. Noda, "Tandem photonic-crystal thin films surpassing Lambertian light-trapping limit over broad bandwidth and angular range,'' Applied Physics Letters, 104, 091121 (2014).
A. Oskooi and S.G. Johnson, "Electromagnetic Wave Source Conditions,'' in Advances in FDTD Computational Electrodynamics: Photonics and Nanotechnology (A. Taflove, A. Oskooi, and S. G. Johnson), ch. 4, pp. 65-100, Boston: Artech (2013).
T. Inoue, T. Asano, M. De Zoysa, A. Oskooi, and S. Noda "Design of single-mode narrow-bandwidth thermal emitters for enhanced infrared light sources'' J. Opt. Soc. Am. B, 30, pp. 165-172 (2013).
H. Shigeta, M. Fujita, Y. Tanaka, A. Oskooi, H. Ogawa, Y. Tsuda, and S. Noda, "Enhancement of photocurrent in ultrathin active-layer photodetecting devices with photonic crystals,'' Applied Physics Letters, 101, 161103 (2012).
A. Oskooi, A. Mutapcic, S. Noda, J.D. Joannopoulos, S.P. Boyd, and S.G. Johnson, "Robust optimization of adiabatic tapers for coupling to slow-light photonic-crystal waveguides,'' Optics Express, 20, pp. 21558-21575 (2012).
M. De Zoysa, T. Asano, K. Mochizuki, A. Oskooi, T. Inoue, and S. Noda, "Conversion of broadband to narrowband thermal emission through energy recycling,'' Nature Photonics, 6, pp. 535-539 (2012).
A. Oskooi, P.A. Favuzzi, Y. Tanaka, H. Shigeta, Y. Kawakami, and S. Noda, "Partially-disordered photonic-crystal thin films for enhanced and robust photovoltaics,'' Applied Physics Letters, 100, 181110 (2012). [selected for Virtual J. Nano. Sci. & Tech.]
A. Oskooi, P.A. Favuzzi, Y. Kawakami, and S. Noda, "Tailoring repulsive optical forces in nanophotonic waveguides,'' Optics Letters, 36, pp. 4638-4640 (2011). [highlighted in Nature Physics]
H. Hashemi, A. Oskooi, J.D. Joannopoulos, and S.G. Johnson, "General scaling limitations of ground plane cloaks,'' Physical Review A, 84, 023815 (2011).
A. Oskooi and S.G. Johnson, "Distinguishing correct from incorrect PML proposals and a corrected unsplit PML for anisotropic, dispersive media,'' J. Computational Physics, 230, pp. 2369-2377 (2011).
L. Zhang, J. H. Lee, A. Oskooi, A. Hochman, J. K. White, and S.G. Johnson, "A novel boundary element method using surface conductive absorbers for full-wave analysis of 3-D nanophotonics,'' J. Lightwave Technology, 29, pp. 949-959, (2011).
A.F. Oskooi, D. Roundy, M. Ibanescu, P. Bermel, J.D. Joannopoulos, and S.G. Johnson, "MEEP: A flexible free-software package for electromagnetic simulations by the FDTD method,'' Computer Physics Communications, 181, pp. 687-702 (2010). [among most cited papers in journal]
A.F. Oskooi, C. Kottke, and S.G. Johnson, "Accurate finite-difference time-domain simulation of anisotropic media by subpixel smoothing,'' Optics Letters, 34, pp. 2778-2780 (2009).
P.-R. Loh, A. F. Oskooi, M. Ibanescu, M. Skorobogatiy, and S.G. Johnson, "A fundamental relation between phase and group velocity, and application to failure of PML in backward-wave structures,'' Physical Review E, 79, 065601 (2009).
A. Mutapcic, S. Boyd, A. Farjadpour, S.G. Johnson, and Y. Avniel, "Robust design of slow-light tapers in periodic waveguides,'' Engineering Optimization, 41, pp. 365-384 (2009).
A.F. Oskooi, J.D. Joannopoulos, and S.G. Johnson, "Zero--group-velocity modes in chalcogenide holey photonic-crystal fibers,'' Optics Express, 17, pp. 10082-10090 (2009).
A.F. Oskooi, L. Zhang, Y. Avniel, and S.G. Johnson, "The failure of perfectly matched layers, and towards their redemption by adiabatic absorbers,'' Optics Express, 16, pp. 11376-11392 (2008).
K.K. Lee, A. Farjadpour, Y. Avniel, J.D. Joannopoulos, and S.G. Johnson, "A tale of two limits: fundamental properties of photonic-crystal fibers,'' Proc. SPIE, vol. 6901, 69010K (2008). [invited paper]
C. Kottke, A. Farjadpour, and S.G. Johnson, "Perturbation theory for anisotropic dielectric interfaces, and application to sub-pixel smoothing of discretized numerical methods,'' Physical Review E, 77, 036611 (2008).
A. Farjadpour, D. Roundy, A. Rodriguez, M. Ibanescu, P. Bermel, J.D. Joannopoulos, S.G. Johnson, and G.W. Burr, "Improving accuracy by subpixel smoothing in the finite-difference time domain,'' Optics Letters, 31, pp. 2972-2974 (2006).
G.W. Burr and A. Farjadpour, "Balancing accuracy against computation time: 3-D FDTD for nanophotonics device optimization,'' Proc. SPIE, vol. 5733, pp. 336-347 (2005).
* previously published under Farjadpour