Mechanism that governs the electro-optic response of second-order nonlinear polymers on silicon substrates

We use a modified Teng-Man technique to investigate the poling induced electro-optic activity of chromophore-doped organic polymers poled on silicon substrate in a thin film sample configuration. We reveal a fundamental difference between the poling processes on silicon substrate and ITO substrate. The electro-optic activity for polymers poled on silicon substrate is reduced which we ascribe to space charge formation at the silicon - organic interface that distorts the field distribution in the polymer film during high field poling, and therefore limits the effective induced polar order. We demonstrate that the electro-optic activity on silicon substrate can be improved by inserting a 5 nm thin dielectric layer of Al2O3 between the silicon substrate and the polymer which reduces the leak-through current during poling, thereby allowing for higher applicable poling voltages.

[1]  J. Witzens,et al.  On the measurement of the Pockels effect in strained silicon. , 2015, Optics letters.

[2]  D Zhang,et al.  Unprecedented highest electro-optic coefficient of 226 pm/V for electro-optic polymer/TiO₂ multilayer slot waveguide modulators. , 2014, Optics express.

[3]  A. Jen,et al.  Modification of a Teng-Man technique to measure both r33 and r13 electro-optic coefficients , 2014 .

[4]  Wolfgang Freude,et al.  High-Speed, Low Drive-Voltage Silicon-Organic Hybrid Modulator Based on a Binary-Chromophore Electro-Optic Material , 2014, Journal of Lightwave Technology.

[5]  Ray T. Chen,et al.  Highly efficient mode converter for coupling light into wide slot photonic crystal waveguide. , 2014, Optics express.

[6]  Raluca Dinu,et al.  100 GHz silicon–organic hybrid modulator , 2014, Light: Science & Applications.

[7]  Ray T. Chen,et al.  Integrated Photonic Electromagnetic Field Sensor Based on Broadband Bowtie Antenna Coupled Silicon Organic Hybrid Modulator , 2014, Journal of Lightwave Technology.

[8]  Ray T. Chen,et al.  Wide optical spectrum range, subvolt, compact modulator based on an electro-optic polymer refilled silicon slot photonic crystal waveguide. , 2013, Optics letters.

[9]  Ray T. Chen,et al.  Polymer-Based Hybrid-Integrated Photonic Devices for Silicon On-Chip Modulation and Board-Level Optical Interconnects , 2013, IEEE Journal of Selected Topics in Quantum Electronics.

[10]  Jingdong Luo,et al.  Highly Efficient Organic Electrooptic Materials and Their Hybrid Systems for Advanced Photonic Devices , 2013, IEEE Journal of Selected Topics in Quantum Electronics.

[11]  J. Leuthold,et al.  Low Power Mach–Zehnder Modulator in Silicon-Organic Hybrid Technology , 2013, IEEE Photonics Technology Letters.

[12]  D Hillerkuss,et al.  42.7 Gbit/s electro-optic modulator in silicon technology. , 2011, Optics express.

[13]  Xiaolong Wang,et al.  Effective in-device r33 of 735 pm/V on electro-optic polymer infiltrated silicon photonic crystal slot waveguides. , 2011, Optics letters.

[14]  T. Baehr‐Jones,et al.  Silicon-polymer hybrid slot waveguide ring-resonator modulator. , 2011, Optics express.

[15]  Ray T. Chen,et al.  Electro-optic polymer infiltrated silicon photonic crystal slot waveguide modulator with 23 dB slow light enhancement , 2010 .

[16]  Jingdong Luo,et al.  40 GHz electro-optic modulation in hybrid silicon-organic slotted photonic crystal waveguides. , 2010, Optics letters.

[17]  P Sullivan,et al.  Demonstration of a low V pi L modulator with GHz bandwidth based on electro-optic polymer-clad silicon slot waveguides. , 2010, Optics express.

[18]  Jingdong Luo,et al.  Highly efficient electro-optic polymers through improved poling using a thin TiO2-modified transparent electrode , 2010 .

[19]  Thomas F. Krauss,et al.  Electro-optic modulation in slotted resonant photonic crystal heterostructures , 2009 .

[20]  Raluca Dinu,et al.  Broadband electro-optic polymer modulators with high electro-optic activity and low poling induced optical loss , 2008 .

[21]  Larry R. Dalton,et al.  Binary Chromophore Systems in Nonlinear Optical Dendrimers and Polymers for Large Electrooptic Activities , 2008 .

[22]  Larry R. Dalton,et al.  Nonlinear polymer-clad silicon slot waveguide modulator with a half wave voltage of 0.25 V , 2008 .

[23]  T. Baehr‐Jones,et al.  Polymer Silicon Hybrid Systems: A Platform for Practical Nonlinear Optics† , 2008 .

[24]  A. Belardini,et al.  Use of sandwich structures with ZnO:Al transparent electrodes for the measurement of the electro-optic properties of standard and fluorinated poled copolymers at λ = 1.55 μm , 2006 .

[25]  K. Runge,et al.  Formation of a quasi-neutral region in Schottky diodes based on semi-insulating GaAs and the influence of the compensation mechanism on the particle detector performance , 1999 .

[26]  Mario Bertolotti,et al.  On the measurement of the electro-optic properties of poled side-chain copolymer films with a modified Teng–Man technique , 1999 .

[27]  A. Cola.  Reverse current in SI GaAs pixel detectors , 1998 .

[28]  Tupei Chen,et al.  Reverse I–V characteristics of Au/semi-insulating GaAs(1 0 0) , 1997 .

[29]  C. C. Teng,et al.  Simple reflection technique for measuring the electro‐optic coefficient of poled polymers , 1990 .

[30]  Jerome D. Swalen,et al.  Corona poling and real‐time second‐harmonic generation study of a novel covalently functionalized amorphous nonlinear optical polymer , 1989 .

[31]  Robert Blum,et al.  High-electric-field poling of nonlinear optical polymers , 1998 .

[32]  Robert Blum,et al.  High electric field conduction mechanisms in electrode poling of electro‐optic polymers , 1996 .

[33]  A. C. Lilly,et al.  High‐Field Conduction in Films of Mylar and Teflon , 1968 .