Simulation of Optoelectronic Devices. Günther Zandler
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1 Simulation of Optoelectronic Devices Günther Zandler 10/21/2005
2 Outline Silvaco ATLAS General Optoelectronic Capabilities InGaN/GaN Material System Optical Coupling Micro-Ring Device -2-
3 Silvaco Background Founded in 1984 by Dr. Ivan Pesic Market Leader in SPICE Simulation, TCAD, and IC CAD Large Customer Base of Foundry, IDM, ASIC, and Fabless Semiconductor Companies Headquarters in Silicon Valley with 11 Offices Worldwide Privately Held, Profitable Since Inception, Debt-free Grown from Retained Earnings, No VC Funding Currently Employs Over 220 Professionals 80% with Advanced Engineering Degrees (MS, PhD) Worldwide Technical Support and Training Active Programs with Leading Foundries, EDA Vendors, Universities, Industry Standards, and Government Agencies -3-
4 Connecting TCAD to Tapeout Design Flow -4-
5 ATLAS Physical Models Drift Diffusion (Hetrojunctions) Heat flow Imbedded Circuit Energy Balance/Hydrodynamic Traps/Amorphous Photodetection (Ray Trace, BPM, Waveguide) Quantum Effects (MOS, S-P, QM, BQP) Light Emitters (LED, Laser, VCSEL) C-Interpreter -5-
6 ATLAS Product Hierarchy o -6-
7 ATLAS Context -7-
8 Optical Models -8-
9 ATLAS Luminous -9-
10 ATLAS Quantum Selected Results -10-
11 ATLAS LED -11-
12 ATLAS Laser Selected Results -12-
13 ATLAS VCSEL -13-
14 VCSEL structures Cold cavity analysis Easy overlay of optical and electrical quantities -14-
15 Polarization Effects on Band Edges in InGaN Microring LED -15-
16 Lorentzian Broadening -16-
17 Three Well LED with Random Composition Variation -17-
18 LED Spectrum Effects of Random Composition -18-
19 LED Output Coupling Efficiency Without Reflector -19-
20 LED Output Coupling Efficiency: With Mirror -20-
21 LED Output Coupling Efficiency: With Mirror and Interference -21-
22 LED Output Coupling Efficiency: Mirror, Interference and Integrated -22-
23 LED Output Coupling Efficiency: Mirror, Interference, Integrated and Multispectral -23-
24 Organic Materials Poole Frenkel Mobility Models Langevin Recombination Models Defect Distributions (otft) Dynamic Equations for Excitions (Singlet & Triplet) Various Recombination Rates can enter in Reverse Ray Tracing -24-
25 Micro-ring Device Structure Reference: Choi, H.W. et.al., "High extraction efficiency InGaN micro-ring light-emitting diodes", Appl. Phys. Lett., Vol. 83, No. 22, pp
26 Micro-Ring LED structure in ATLAS -26-
27 Effects of Choice of Well Composition on Simulated Emission Wavelength -27-
28 Effects of Choice of Bowing Factor on Simulated Emission Wavelength Reference: Piprek, J. "Semiconductor Optoelectronic Devices Introduction to Physics and Simulation", Academic Press, UCSB, 2003, pp. 142 and
29 Effect of Well Thickness on Blue Shift -29-
30 Broad Area / Micro-ring LED Broad Area LED Micro-ring LED Shortcomings of the proposed micro-ring design are shown Improvements of coupling efficiency and insignificant changes of radiation profile are confirmed -30-
31 Conclusion Simulation of various types of devices in absorptions and emission Wide range of physicals models for coupled electrical and optical simulation Support for novel materials and materials systems -31-
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