
Photovoltaics QCRFFDTD Simulator
15 Oct 2015  Tools  Contributor(s): Jacob R Duritsch, Haejun Chung, Peter Bermel
Simulates optical and electrical behaviors of photovoltaic cells using a FDTD simulation method and QCRF material modeling.

Thermophotovoltaic Experiment
15 Jun 2015  Tools  Contributor(s): Evan L Schlenker, Zhou Zhiguang, Peter Bermel
Simulates thermophotovoltaic system, accounting for thermal losses.

ECE 305: Fall 2015 Course Introduction
27 Aug 2015  Presentation Materials  Contributor(s): Peter Bermel
ECE 305: Fall 2015
Course Introduction

A Crash Course in Nanophotonic Simulations
18 Jun 2015  Online Presentations  Contributor(s): Peter Bermel
This seminar will cover rapid, scalable computational methods used in simulating optical reflection,
transmission, and absorption in complex structures. After a brief survey of the tools available, the S4 simulation tool will be demonstrated in detail.

Symposium on Nanomaterials for Energy: Photonic Nanostructures for Enabling HighEfficiency Thermophotovoltaics
14 May 2015  Online Presentations  Contributor(s): Peter Bermel
Thermophotovoltaic (TPV) systems generate electricity using heat drawn from one or more of a wide variety of sources, including sunlight, fossil fuels, and radioisotopes. They function as solidstate devices, in which heat is thermally radiated as photons onto TPV modules that generate electricity using the same mechanism as solar cells. The two key challenges of the field are integrating the heatgenerating mechanism with the electricitygenerating back end, and achieving high efficiencies at relatively modest temperatures and smaller form factors. Both problems can be addressed by introducing photonic crystals (PhCs), which offer an unprecedented ability to control the emission and flow of light. For example, heat can be harvested from sunlight effectively by 1D PhC selective solar absorbers, which can increase solar absorption up to 98%, while holding spectrally averaged emissivity down to 4%. Additionally, 2D periodic PhCs can be used to enhance thermal radiation of short wavelengths the TPV modules can convert into electricity, while suppressing emission of longer wavelength photons. Furthermore, 1D PhC filters can help recycle the vast majority of the remaining emitted longwavelength photons. Employing all of these PhC elements and operating at 8001000 degrees Celsius can potentially result in an array of highperforming devices. Solar TPV can reach up to 45% efficient conversion of sunlight to electricity, an order of magnitude above previous experimental efforts, and well above the ShockleyQueisser limit for singlejunction photovoltaic cells. Radioisotope TPV can reach up to 24% efficient conversion of excess heat generated from natural radioactive decay into electricity in a portable form factor comparable to two D batteries. Propaneburning TPV can reach up to 32% efficient conversion of the lower heating value of propane into electricity within a handheld form factor. While many further experiments are needed to approach these theoretical limits, TPV has the potential to achieve much higher energy and power densities and reliability, as well as greater fuel flexibility, than many current energy generation and storage technologies.

Failures in Photovoltaic Modules
21 Apr 2015  Online Presentations  Contributor(s): Peter Bermel
In this talk, I will discuss some of the major sources of performance degradation for common glassencapsulated PV modules, including crystalline silicon and thin films. The greatest reliability challenges have occurred in the latter, with recent studies showing that thinfilm modules operating in damp heat at 600 V are vulnerable to large amounts of degradation, potentially exceeding half the original power output.

Generation Model with Coupled Mode Theory
20 Jul 2012  Tools  Contributor(s): yujie guo, Peter Bermel, Roman Shugayev
Models generation of an optical comb in a multipleresonance cavity coupled to a single waveguide, using coupled mode theory to represent linear and nonlinear dynamics

Thermophotonic Selective Emitter Simulation
14 Jul 2014  Tools  Contributor(s): Anubha Mathur, Enas Sakr, Peter Bermel
Simulate Thermophotovoltaics With Rare EarthBased Selective Emitters

nanoHUBU Nanophotonics Modeling: Scientific Overview
01 Aug 2014  Online Presentations  Contributor(s): Peter Bermel
A five week course on Nanophotonic Modeling.

Stanford Stratified Structure Solver (S4) Simulation tool
25 Mar 2014  Presentation Materials  Contributor(s): Chang Liu, Ogaga Daniel Odele, Xufeng Wang, Peter Bermel

Thermophotovoltaic Efficiency Simulation
25 Mar 2014  Presentation Materials  Contributor(s): Qingshuang Chen, Roman Shugayev, Peter Bermel

FiniteDifference TimeDomain Simulation of Photovoltaic Structures using a Graphical User Interface for MEEP
25 Mar 2014  Presentation Materials  Contributor(s): Xin Tze (Joyce) Tee, Haejun Chung, Peter Bermel

TPV efficiency simulation
22 Jul 2013  Tools  Contributor(s): Qingshuang Chen, Peter Bermel, Roman Shugayev, Masayoshi Sumino, Zhou Zhiguang, Omar R Yehia, Evan L Schlenker
Simulate the efficiency of a thermophotovoltaic system

MEEPPV
29 Aug 2013  Tools  Contributor(s): Xin Tze (Joyce) Tee, Haejun Chung, Peter Bermel
Finitedifference TimeDomain Simulations for photovoltaic cells

ECE 595E Lecture 36: MEEP Tutorial II
30 Apr 2013  Online Presentations  Contributor(s): Peter Bermel
Outline:
 Recap from Monday
 Examples
 Multimode ring resonators
 Isolating individual resonances
 Kerr nonlinearities
 Quantifying thirdharmonic generation

ECE 595E Lecture 35: MEEP Tutorial I
18 Apr 2013  Online Presentations  Contributor(s): Peter Bermel
Outline:
 MEEP Interfaces
 MEEP Classes
 Tutorial examples:

ECE 595E Lecture 34: Applications of FiniteDifference TimeDomain Simulations
18 Apr 2013  Online Presentations  Contributor(s): Peter Bermel
Outline:
 Recap from Wednesday
 Periodic and randomly textured lighttrapping structures
 Overview
 Experimental motivation
 Computational setup
 Simulated field evolution
 Absorption spectra
 Front coatings
 Correlated random structures

ECE 595E Lecture 31: Coupled Mode Theory Simulation (CMT)
12 Apr 2013  Online Presentations  Contributor(s): Peter Bermel
Outline:
 Recap from Wednesday
 Overview of Coupled Mode Theory
 Derivation of Coupled Mode Equations
 Applications:
 Single Waveguides
 AddDrop filters
 Waveguide Bends
 Channel Drop
 TSplitters
 Nonlinear Kerr Waveguides

ECE 595E Lecture 32: Simulations of Coupled Mode Theory Simulation (CMT)
12 Apr 2013  Online Presentations  Contributor(s): Peter Bermel
Outline:
 Recap from Friday
 Numerical ODE solvers
 Initial value problems
 Boundary value problems
 nanoHUB Tool – CMTcomb3:
 Rationale
 Governing ODEs
 User interface
 Output analysis

ECE 595E Lecture 33: Introduction to FiniteDifference TimeDomain Simulations
12 Apr 2013  Online Presentations  Contributor(s): Peter Bermel
Outline:
 Recap from Monday
 Introduction to FDTD
 Special features of MEEP:
 Perfectly matched layers
 Subpixel averaging
 Symmetry
 Scheme (programmable) interface
 Examples:
 Periodic lighttrapping structures
 Randomly textured structures

ECE 595E Lecture 28: SMatrix Computations
08 Apr 2013  Online Presentations  Contributor(s): Peter Bermel

ECE 595E Lecture 30: Applications of CAMFR
08 Apr 2013  Online Presentations  Contributor(s): Peter Bermel

S4: Stanford Stratified Structure Solver
11 Sep 2012  Tools  Contributor(s): Jiarui Kang, Xufeng Wang, Peter Bermel, Chang Liu
S4 is a frequency domain code to solve layered periodic structures. Internally, it uses Rigorous Coupled Wave Analysis (RCWA; also called the Fourier Modal Method (FMM)) and the Smatrix algorithm.

ECE 595E Lecture 29: Eigenmode Layered Computations (CAMFR)
28 Mar 2013  Online Presentations  Contributor(s): Peter Bermel

ECE 595E Lecture 23: Electronic Bandstructures
27 Mar 2013  Online Presentations  Contributor(s): Peter Bermel
Outline:
 3D Lattice Types
 Full 3D Photonic Bandgap Structures
 Yablonovite
 Woodpile
 Inverse Opals
 RodHole 3D PhCs