Conferences


2017

146-Amr S. Helmy, Yiwen Su, Charles Lin and Pohan Chang, ‘Efficient plasmonic integrated circuits,’ SPIE Photonics West, (2017). Invited

145-Amr S. Helmy and Ryan Marchildon, ‘Quantum interference in monolithic nanophotonics,’ SPIE Photonics West, (2017). Keynote

144-Curtis J. Firby, Pohan Chang, Amr S. Helmy, and A. Elezzabi, ‘High-speed polarization modulation in a hybrid ridge-plasmonic waveguide,’ SPIE Photonics West, (2017). Invited

143-Amr S. Helmy, Plasmonic integrated circuits PIERS- Shanghai, 2017. Invited

142-Amr S. Helmy, Monolithic Quantum Interference, OSA-LAOP, 2017. Invited

2016

141-Amr S. Helmy, Yiwen Su, Charles Lin and Pohan Chang, ‘Nanoscale photonics using coupled hybrid plasmonic architectures,’ SPIE Photonics Europe, (2016). Invited

140-Dongpeng Kang, Ankita Anirban, and Amr S. Helmy, ‘Monolithic Semiconductor Entangled Sources Spanning the S-C-L bands,’ CLEO: Science and Innovations, (2016).

139-Amr S. Helmy and Ryan Marchildon, ‘On Chip Quantum Interference,’ Light, ChangChun (2016).Invited

138-Charles Lin, Amr S. Helmy, ‘Nanoscale photonics using coupled hybrid plasmonic architectures,’ SPIE Photonics West, (2016).Invited

137-Amr S. Helmy, ‘Deterministic Quantum State Separation in Integrated Photonics,’ OSA Topical – Latin America Optics and Photonics, Medellin, Colombia, (2016). Invited

2015

136-Amr S. Helmy ‘Assymteric Long Range Nano-Photonic Devices,’ OSA Topical Meeting, Hangzhou, (2015). Invited

135- Amr S. Helmy ‘Assymteric Long Range Nano-Photonic Devices,’ OSA Topical Meeting, Hangzhou, (2015). Invited

134- Amr S. Helmy ‘2D materials within long-range hybrid plasmonic modes in asymmetric structures,’ The 6th International Conference on Metamaterials, Photonic Crystals and Plasmonics, NYC, (2015). Invited

133- Nima Zareian, Amr S. Helmy ‘Static and dynamic characteristics of integrated semiconductor optical parametric oscillators,’ Photonics North, (2015).
Invited

132- Ryan Marchildon and A. S. Helmy, ‘Quantum State Engineering in Integrated Couplers,’ CLEO: Science and Innovations, (2015).

131- Dongpeng Kang, Minseok Kim, Haoyu He, and A. S. Helmy, ‘Entanglement Diversity in Monolithic Waveguides,’ CLEO: Science and Innovations, (2015).

130- Fangxin Li and A. S. Helmy, ‘Stable, Tuneable, All-optical Pulse Generation with 1 Hz Phase Noise,’ CLEO: Science and Innovations, (2015).

129- Steven Rutledge and A. S. Helmy, ‘Etch-Free Patterning of PEDOT:PSS for Optoelectronics,’ CLEO: Science and Innovations, (2015).

128- Janahan Ramanan, Basil G. Eleftheriades, Bhagrava Ravoori, Marie Tripp, Tuyen K. Tran, and Amr S. Helmy, ‘Sensitive Nanomaterials Detection and Analysis in Solution,’ Frontiers in Nano-electronics Metrology- Dresden (2015).

127- Amr S. Helmy, Charles Lin and Wen Ma, ‘Long Range Hybrid Plasmonic Modes in Asymmetric Structures,’ SPIE Photonics West, (2015). Invited

126- Amr S. Helmy, P. Abolghasem, J. Ramanan, D. Kang and D. Logan, ‘Integrated Optical Sensing Technologies on SOI,’ SPIE Photonics West, (2015).
Invited

125- Amr S. Helmy, Jacky S. W. Mak, and J. Ramanan, ‘Nondestructive Analysis of Nanomaterials using Optofluidic Assisted Raman Spectroscopy,’ SPIE Photonics West, (2015).
Invited

124- Amr S. Helmy, P. Abolghasem and D. Kang, ‘Frequency Conversion for Infrared Generation in Monolithic Semiconductor Waveguides,’ SPIE Photonics West, (2015).
Invited

123- M. Swillam and A. S. Helmy, ‘Designing plasmonic slot waveguide networks using a semi-analytical approach,’ SPIE Photonics West, (2015).

2014

122- Amr. S. Helmy and F. Li, ‘Broadband Low Phase Noise and RF-Free Optical Pulse Generation for Hybrid Integration,’ OSA Topical – Latin America Optics and Photonics,
Cancun, (2014).
Invited

121- Amr. S. Helmy ‘Utilizing Parametric Processes in Semiconductor Laser Diodes,’ OSA Topical – Latin America Optics and Photonics, Xi’an, (2014). Invited

120- Amr S. Helmy ‘All-optical microwave and high speed pulse generation using FWM,’ CMOS-ET, Grenoble, (2014).
Invited

119- Amr S. Helmy, ‘Monolithic Entangled Photon Sources Using Second Order Optical Nonlinearities,'Electrochemical Society's International Symposium on Integrated Optoelectronics, Florida, (2014).
Invited

118- Rolf T. Horn, Piotr Kolenderski, Dongpeng Kang, Payam Abolghasem, L. G. Helt, Sergei V Zhukovsky, Carmelo Scarcella, Adriano Della Frera, Alberto Tosi,J. E. Sipe , Gregor Weihs, Amr S. Helmy, Thomas Jennewein, ‘Entanglement in a Bragg ReflectionWaveguide,’ CLEO: Science and Innovations, (2014).

117- Fangxin Li and A. S. Helmy, ‘All-optical single-side-band GHz to THz microwave sources via SOA gain engineering,’ CLEO: Science and Innovations, (2014).

116- Dylan F. Logan, A. Villeneuve, M. Giguere, Amr S. Helmy ‘Mid Infrared Sources Based on Widely Tunable DFG in Monolithic Semiconductor Waveguides,’ Photonics North, (2014).
Invited

115- Fangxin Li and Amr S. Helmy, ‘Gain engineering for all-optical microwave and high speed pulse generation in mode-locked fiber lasers,’ SPIE Photonics West, (2014). Invited

2013

114- Amr S. Helmy, ‘Optical Parametric Generation in Laser Diodes,’ OSA FiOLS, 2013.
Invited

113- D. Logan, P. Abolghasem, M. Giguere, A. Villeneuve, and, A. S. Helmy, ‘Mid IR frequency conversion in monolithic semiconductors,’ OSA Mid IR Sources Topical Meeting, Paris, (2013).

112- Wen Ma, and Amr S. Helmy ‘Optical Parametric Generation in Laser Diodes,’ IEEE Photonics Conference, 2013.

111- Amr S. Helmy ‘Recent Developments in Optofluidic-Assisted Raman Spectroscopy,’ Photonics North, 2013. Invited.

110- D. Logan, A. B. Alamin Dow, D. Stepanov, P. Abolghasem, N. P. Kherani, A. S. Helmy, ‘Modal phase-matching of second-order nonlinearities at silicon-oxy-nitride interfaces in multi-layer waveguides,’ CLEO: Science and Innovations, (2013).

109- H. M. K. Wong, C. Lin, M. A. Swillam, A. S. Helmy, ‘Broadband Compact Si Wire to Slot Waveguide Couplers,’ CLEO: Science and Innovations, (2013).

108- P. Abolghasem, B. J. Bijlani, A. S. Helmy, ‘Tuning Curves of Parametric Light Generated using χ(2) Nonlinearities in Semiconductor Lasers,’ CLEO: Science and Innovations, (2013).

107- D. Kang, L. G. Helt, S. V. Zhukovsky, J. P. Torres, J. E. Sipe, A. S. Helmy, ‘Hyperentanglement in Semiconductor Waveguides,’ CLEO: QELS_Fundamental Science, (2013).

106- S. V. Zhukovsky, L. G. Helt, D. Kang, P. Abolghasem, A. S. Helmy, J. E. Sipe, ‘On-Chip Switching Between Optical Bell States,’ CLEO: QELS_Fundamental Science, (2013).

105- F. Li, A. S. Helmy, ‘All optical pulse generation based on gain-induced FWM in a semiconductor optical amplifier,’ CLEO: Science and Innovations, (2013).

104- G. Weihs, T. Günthner, B. Pressl, R. Horn, P. Abolghasem, B. J. Bijlani, D. Kang, A. S. Helmy, ‘Semiconductor sources of photon pairs,’ SPIE OPTO, 863518-863518-6, (2013). Invited

103- M. Swillam, Charles Lin, A. S. Helmy, ‘Equivalent Circuit Model for Plasmonic Slot Waveguide Networks,’ SPIE OPTO, 862710-862710-7, (2013).

2012

102- M. Swillam, Charles Lin, A. S. Helmy, ‘Equivalent Circuit Model for Plasmonic Slot Waveguide Networks,’ SPIE Photonics West, (2012).

101- Charles Lin, Herman Wong, Benedict Lau, M. Swillam, A. S. Helmy, ‘Broadband Efficient Hybrid Plasmonic Nano-Junctions,’ IEEE Photonics Conference, (2012).

100- Charles Lin, M. Swillam, A. S. Helmy, ‘Closed-form Modeling of Plasmonic Mesh Structures,’ IEEE Photonics Conference, (2012).

99- Mandy Lungwitz, Payam Abolghasem, A. S. Helmy, ‘Non-degenerate Difference-Frequency Generation in Single-Stack Bragg Reflection Waveguides’ OSA/IEEE CLEO-QELS, San Jose, 2012.

98- Sergei Zhukovsky, Lukas Helt, Payam Abolghasem, Dongpeng Kang, A. S. Helmy, John Sipe, ‘Maximally Polarization Entangled Photons on a Chip’ OSA/IEEE CLEO-QELS, San Jose, 2012.

97- Dongpeng Kang, A. S. Helmy, ‘Generating polarization entangled photons on-chip using concurrent type-I and type-0 processes’ OSA/IEEE CLEO-QELS, San Jose, 2012

96- Yan Wang. A. S. Helmy, George Eleftheriades, ‘Plasmonic Antenna-Array for 2D Sub-Diffraction Focusing Beyond the Optical Near-Field’ OSA/IEEE CLEO-QELS, San Jose, 2012.

95- A. S. Helmy, B. J. Bijlani, and P. Abolghasem, ‘Intracavity Parametric Fluorescence in Diode Lasers,’ OSA/IEEE ACP, Shanghai, 2012. Invited

2011

94- Mohamed A. Swillam, Benedict Lau, A. S. Helmy, Analysis of Filter Response Using Feedback Plasmonic Junctions,' OSA IPR, Toronto, 2011.

93- J. S. W. Mak, A. Farah, Feifan Chen, A. S. Helmy, 'Efficient Raman Sensor for Nanoparticles using Hollow Core Photonic Crystal Fiber,' OSA IPR, Toronto, 2011.

92- N. Zareian, P. Abolghasem, A. S. Helmy, 'Tailoring the Far Field of Bragg Reflection Waveguides,' OSA IPR, Toronto, 2011.

91- A. S. Helmy, P. Abolghasem, J. Han, B. J. Bijlani, D. Kang, 'Generalized Bragg Reflection Waveguides for Monolithic Frequency Converters using Second Order Nonlinearity,' OSA IPR, Toronto, 2011. Invited

90- A. S. Helmy, 'Nano-scale Plasmonic Networks,' University of Buffalo Nanophotonics Symspoium, Buffalo, 2011. Invited

89- Mohamed Swillam, Benedict Lau, A. S. Helmy, Design, Fabrication and Characterization of Nano-scale Plasmonic Networks,' Photonics North, Ottawa, 2011. Invited

88- J. S. W. Mak, A. Farah, Feifan Chen, Amr S. Helmy, 'Probing Quantum Dot Cores, Their Interfaces and Thiol Cappings Non-Destructively in Dilute Solution using Raman Scattering in Hollow Core Photonic Crystal Fiber,' OSA/IEEE CLEO-QELS, Baltimore, 2011.

87- Sergei Zhukovsky, Lukas Helt, Payam Abolghasem, Dongpeng Kang, John Sipe, Amr S. Helmy, 'High-Performance Entangled Photon Pair Generation in Bragg Reflection Waveguides,' OSA/IEEE CLEO-QELS, Baltimore, 2011.

86- Mohamed A. Swillam, Benedict Lau, Amr S. Helmy, 'Design, Fabrication and Characterization of Wideband Ultra Compact Coupler between Plasmonic Slot and Silicon Waveguides,' OSA/IEEE CLEO-QELS, Baltimore, 2011.

85- R. T. Horn, P. Abolghasem, B. Bijlani, A. S. Helmy and G. Weihs, Type-0 Spontaneous Parametric Down Conversionin AlGaAs Bragg ReflectionWaveguides,' OSA/IEEE CLEO-QELS, Baltimore, 2011.

84- F. Eftekhari, J. Irizar, A. S. Helmy, 'A Comparative Study of Raman Enhancement in Capillaries' OSA/IEEE CLEO-QELS, Baltimore, 2011.

83- B. J. Bijlani, P. Abolghasem, and A. S. Helmy, 'Intracavity Parametric Fluorescence in Diode Lasers,' OSA/IEEE CLEO-QELS, Baltimore, 2011. Post Deadline

82- S. W. Mak, Abdiaziz A. Farah, Feifan Chen, A. S. Helmy, 'Photonic Crystal Fiber for Efficient Raman Scattering of Thiol-capped Quantum Dots in Aqueous Solution,' MRS Spring Meeting, San Francisco, 2011.

81- M. Swillam, A. S. Helmy, ‘Characteristics and applications of rectangular waveguide in sensing, slow light, and negative refraction, ’ SPIE Photonics West, California, 2011.

2010

80- J. Han, P. Abolghasem, D. Kang, B. Bijlani, A. S. Helmy, ‘Wavelength conversion in Bragg reflection waveguides,’ IEEE Photonics Global, Singapore, 2010. (Invited)

79- A. Arjmand, A. S. Helmy, ‘Interface modes for integrated photonic devices’ IEEE Phot. Soc., Annual Meeting, Denver, 2010.

78- C. Tong, B. J. Bijlani, S. Alali and A. S. Helmy, ‘CW Single Photonic Bandgap Mode Operation in Bragg Reflection Waveguide Lasers,’ IEEE Phot. Soc., Annual Meeting, Denver, 2010.

77- J. Han, P. Abolghasem, B. Bijlani, A. S. Helmy, ‘Coupled Interface Modes for Nonlinear Interaction in Periodic Layered Media,’ IEEE Phot. Soc., Annual Meeting, Denver, 2010.

76- B. J. Bijlani, S. Alali C. Tong, and A. S. Helmy, ‘Bragg Reflection Waveguide Diode Lasers for High Temperature Operation,’ IEEE Phot. Soc., Annual Meeting, Denver, 2010.

75- P. Abolghasem, J. Han, B. Bijlani, V. Mercier, A. Villeneuve, B. Burgoyne, P. Martek, A. S. Helmy, ‘Bandgap Effects in AlGaAs Bragg Reflection Waveguides for Enhanced Chi(2) Interactions,’ IEEE Phot. Soc., Annual Meeting, Denver, 2010.

74- I. Sigal, A. S. Helmy and J. Aitchison, ‘Towards Integrated Optical Parametric Oscillators,’ IEEE Phot. Soc., Annual Meeting, Denver, 2010.

73- G. Weihs, R. Horn, A. S. Helmy, ‘Parametric down-conversion in semiconductor waveguides,’ ICONO/LAT, Kazan (2010). (Invited)

72- S. J. Wagner, S. Chaitanya Kumar, O. Kokabee, B. M. Holmes, U. Younis, M. Ebrahimzadeh, D. C. Hutchings, A. S. Helmy, and J. S. Aitchison, 'Performance and Limitations of Quasi-Phase Matching Semiconductor Waveguides with Picosecond Pulses,' Photonics North, Niagara Falls, 2010.

71- S. J. Wagner, I. Sigal, A. S. Helmy, J. Stewart Aitchison, U. Younis, B. M. Holmes, D. C. Hutchings, Difference Frequency Generation in Domain-Disordered Quasi-Phase Matching Semiconductor Waveguides,' OSA/IEEE CLEO-QELS, San Jose, 2010.

70- P. Abolghasem, Junbo Han, Bhavin J. Bijlani, A. S. Helmy, New Modality of Type-I Second Order Nonlinear Interaction in Bulk AlGaAs Bragg Reflection Waveguide,' OSA/IEEE CLEO-QELS, San Jose, 2010.

69- B. J. Bijlani, A. S. Helmy, 'Anti-Guided Bragg Reflection Waveguide Diode Lasers,' OSA/IEEE CLEO-QELS, San Jose, 2010.

68- C. Chen, G. Ding, Boon S. Ooi, L. F. Lester, A. S. Helmy, T. L. Koch, J. C.M. Hwang, 'Modulation Bandwidth Enhancement by Stimulated Raman Scattering in Quantum Dash Lasers,' OSA/IEEE CLEO-QELS, San Jose, 2010.

67- J. Han, P. Abolghasem, B. J. Bijlani, A. S. Helmy, 'Broadband Sum-Frequency Generation in AlGaAs Bragg Reflection Waveguides,' OSA/IEEE CLEO-QELS, San Jose, 2010.

66- Martin Hendrych, Roberto León Montiel, Radek, Machulka, Juan P. Torres, Payam Abolghasem and Amr S. Helmy, 'Generation of entangled photons in Bragg reflection waveguides,' European Conference on Integrated Optics, Cambridge, 2010.

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65- A. Schaarschmidt, A. A. Farah, A. Aby, A. S. Helmy, 'Influence of Rapid Thermal Annealing on the Molecular Structure of PEDOT-PSS Thin Films,' IEEE Photonics Society Annual Meeting, Turkey, 2009.

64- S. Rutledge, Jordan Dinglasan, Darren Anderson, Anjan Das, Jane Goh, Cynthia Goh, A. S. Helmy, 'Application of Raman Spectroscopy Using Hollow Core Photonic Crystal Fibers to Study Aqueous Semiconductor Colloid Nanoparticles,' IEEE Photonics Society Annual Meeting, Turkey, 2009.

63- P. Abolghasem, J. Han, B. Bijlani, A. Arjmand, A. S. Helmy, ' Second-Harmonic Generation using Matching-Layer Enhanced AlxGa1-xAs Bragg Reflection Waveguide,' IEEE Photonics Society Annual Meeting, Turkey, 2009.

62- P. Abolghasem, B. J. Bijlani, A. S. Helmy, ' Efficient Second-Harmonic Generation in Monolithic Matching-Layer Enhanced AlxGa1-xAs Bragg Reflection Waveguides,' OSA/FiO, Baltimore, 2009.

61- Shin-ichiro Yanagiya; Jouta Morimoto; Nobuo Goto; Amr S. Helmy, Nonlinear optical and ellipsometric study of manganese-phthalocyanine thin films, SPIE Optics and Photonics, San Diego, 2009.

60- J. S. Aitchison, S. J. Wagner, A. S. Helmy, U. Younis, B. M. Holmes D. C. Hutchings 'Nonlinear optics in superlattice waveguides,' SPIE Photonics North, Quebec, 2009. (Invited)

59- K. M. Groom, N. J. Stevens, D. T. D. Childs, R. R. Alexander, J. S. Roberts, A.S. Helmy, R. A. Hogg, 'GaAs-Based Self-Aligned Laser Incorporating an InGaP Opto-Electronic Confinement Layer,' OSA/IEEE CLEO-QELS, Baltimore, 2009.

58- P. Abolghasem, Xiaojuan Shi, Martin Hendrych, Juan P. Torres, A. S. Helmy, ' Bragg Reflection Waveguides: A Novel Platform for Enhanced Control of Photon-Pair Generation via Spontaneous Parametric Down Conversion' OSA/IEEE CLEO-QELS, Baltimore, 2009.

57- P. Abolghasem, B. J. Bijlani, A. S. Helmy, ' Continuous-Wave Frequency Doubling of Near-Infrared Light Using AlxGa1-xAs Bragg Reflection Waveguides' OSA/IEEE CLEO-QELS, Baltimore, 2009.

56- Steven Rutledge, Jordan Dinglasan, Darren Anderson, Anjan Das, Jane Goh, Cynthia Goh, A. S. Helmy, 'Effects of rapid thermal annealing on CdTe nanoparticles: A Raman spectroscopic study using hollow core photonic crystal fiber' OSA/IEEE CLEO-QELS, Baltimore, 2009.

55- Barry M. Holmes, Usman Younis , David C. Hutchings, Sean J. Wagner, A. S. Helmy, J. Stewart Aitchison, 'Type-II quasi-phase-matched second harmonic generation in domain-disordered semiconductor waveguides' OSA/IEEE CLEO-QELS, Baltimore, 2009.

54- A. S. Helmy, P. Abolghasem, B. J. Bijlani, 'Harnessing second order optical nonlinearities in compound semiconductors,' SPIE Photonics West, California, 2009. (Invited)

53- P. Abolghasem, B. J. Bijlani, A. S. Helmy, 'Enhanced second harmonic generation in ridge Bragg reflection waveguide,' IEEE LEOS Annual Meeting, California, 2008.

52- S. Wagner, B. M. Holmes, U. Younis, A. S. Helmy, D. C. Hutchings, J. S. Aitchison, 'Quasi-phase-matched continuous wave second-harmonic generation in periodically intermixed GaAs/AlGaAs superlattice waveguides,' IEEE LEOS Annual Meeting, California, 2008.

51- A. S. Helmy, J. Irizar, S. Rutledge, J. Dinglasan, C. Goh, J. B. Goh, D. Anderson, 'Raman spectroscopy of nanoparticles in photonic crystal fibres,' IEEE Photonics Global, Singapore, 2008. (Invited)

50- P. Abolghasem, B. J. Bijlani, A. S. Helmy, 'Phase Matching Second Order Optical Nonlinearities in Compound Semiconductors,' Electrochemical Society's International Symposium on Integrated Optoelectronics, Hawaii, 2008. (Invited)

49- Y. Wang, A. S. Helmy, G. Eleftheriades, 'Plasmonic nanoslot antennas for optical sub-wavelength focusing,' URSI-GA, Chicago, 2008. (Invited)

48- K. M. Groom, R. R. Alexander, D. T. D. Childs, A. B. Krysa, J. S. Roberts, A. S. Helmy, R. A. Hogg, 'GaAs-based buried heterostructure laser incorporating an InGaP opto-electronic confinement layer,' OSA/IEEE CLEO-QELS, California, 2008.

47- A. Al Muhairi, S. J. Wagner, J. S. Aitchison, and A. S. Helmy, 'Group velocity mismatch and third-order nonlinearities in domain-disordered quasi-phase matching waveguides,' OSA/IEEE CLEO-QELS, California, 2008.

46- J. Irizar, J. Dinglasan, J. Goh, A. Khetani, H. Anis, D. Anderson, C. Goh, A. S. Helmy, 'Raman spectroscopy of nanoparticles in photonic crystal fibers,' OSA/IEEE CLEO-QELS, California, 2008.

45- B. J. Bijlani, P. Abolghasem, A. S. Helmy, 'Phase matching using ridge Bragg reflection waveguides,' OSA/IEEE CLEO-QELS, California, 2008.

44- S. J. Wagner, A. S. Helmy, and J. S. Aitchison, U. Younis, B. M. Holmes D. C. Hutchings, 'Control of the third-order nonlinearities in a GaAs/AlGaAs superlattice by ion implantation quantum well intermixing,' OSA/IEEE CLEO-QELS, California, 2008.

43- K. M. Groom, N. J. Stevens, D. T. D. Childs, R. R. Alexander, J. S. Roberts, A.S. Helmy, R. A. Hogg, 'GaAs-Based Self-Aligned Laser Incorporating an InGaP Opto-Electronic Confinement Layer,' IEEE 21st International Semiconductor Laser Conference, 2008.

42- B. Bijlani, P. Abolghasem, A. S. Helmy,‘Phase matching in monolithic Bragg reflection waveguides,’ IEEE LEOS Annual Meeting , Florida, 2007.

41- Y. Wang, A. S. Helmy, G. Eleftheriades, 'Nanometre scale contra directional couplers based on metamaterials,' SPIE Nanophotonics, California, 2007. (Invited)

40- A. S. Helmy, P. Scrutton, B. Fung, 'Interface Raman modes in short superlattice nanostructures,’ Photonics North, Ottawa, 2007.

39- B. S. Ooi, H. S. Djie, A. S. Helmy, J. C.M. Hwang, 'Broadband emission in InAs/InGaAlAs quantum-dash-in-well laser,' Materials Research Society Singapore Annual Meeting, Singapore, 2007. (Invited)

38- C. A. Merchant, S. M. Eaton, R. Iyer, A. Helmy, P. R. Herman, J. S. Aitchison, C. Hnatovsky, R. S. Taylor, 'Low-loss waveguides fabricated in KGd(WO4)2 by high repetition rate femtosecond laser,' IEEE/OSA CLEO, Baltimore, 2007. (Post Deadline Paper)

37- E. Shaffer, A. S. Helmy, D. Drouin, J. J. Dubowski, 'Excimer laser-induced crystallization of CdSe thin films,' Conf. Laser Abelation and Applications, Spain, 2007.

36- A. H. Nejadmalayeri, P. Scrutton, J. Mak, A. S. Helmy, P. R. Herman, J. Burghoff, S. Nolte, A. Tünnermann, J. Kaspar, 'Solid-phase generation of silicon nanoparticles by ultrafast laser irradiation,' IEEE/OSA CLEO-QELS, Baltimore, 2007.

35- Brian R. West, A. S. Helmy, 'Waveguiding properties of Bragg reflector waveguides,' SPIE Photonics West, SanFransisco, 2007.

34- S. J. Wagner, J. Meier, A. S. Helmy, and J. S. Aitchison, D. Modotto, M. Sorel, D. C. Hutchings, 'Polarization-dependent nonlinear refraction in GaAs/AlAs superlattice waveguides', OSA Annual Meeting, Frontiers in Optics, Rochester, 2006.

33- P. Scrutton, M. Sorel, D. C. Hutchings, J. S. Aitchison and A. S. Helmy, 'Interface Raman modes to study compositional intermixing in GaAs/AlAs superlattice,' IEEE LEOS Annual Meeting, Montreal, 2006.

32- C. A. Merchant, P. Scrutton, A.S. Helmy, S. Garcia-Blanco, C. Hnatovsky, R.S. Taylor, A. García-Navarro, G. García, F. Agulló-López, J. Olivares, J.S. Aitchison, 'Waveguide characterization in KGd(WO4)2 formed by swift heavy ion irradiation,' IEEE LEOS Annual Meeting, Montreal, 2006.

31- S. J. Wagner, J. Meier, A. S. Helmy, J. S. Aitchison, D. Modotto, M. Sorel, D. C. Hutchings, 'Cross-phase modulation in GaAs/AlAs superlattice-core waveguides below the half band gap,' IEEE LEOS Annual Meeting, Montreal, 2006.

30- Brian R. West, A. S. Helmy, 'Dispersion properties of Bragg reflector waveguides,' Photonics North, Quebec, 2006.

29- A. S. Helmy, Brian R. West, 'Phase matching using Bragg reflector waveguides,' IEEE LEOS Annual Meeting, Sydney, 2005.

28- A. S. Helmy, P. Martin, J. P. Landesman, A. C. Bryce, J. S. Aitchison, J. H. Marsh, 'Spatially resolved photoluminescence and Raman spectroscopy of bandgap gratings fabricated in GaAs-AlAs superlattice waveguides using quantum well intermixing,' Materials Research Society Singapore Annual Meeting, Singapore, 2005.

27- D. C. Hutchings, M. Sorel, K. Zeaiter, A. J. Zilkie, B. Listee, A. S. Helmy, P. W. E. Smith, J. S. Aitchison, 'Quasi-phase-matched second harmonic generation with picosecond pulses in GaAs/AlAs superlattice waveguides,' OSA Nonlinear Guided Waves, Toronto, 2004.

26- A. S. Helmy, D. C. Hutchings, T. C. Kleckner, J. S. Aitchison, A. C. Bryce, J. H. Marsh, P. Martin, J. P. Landesman, C. N. Ironside, C. T. A. Brown, K. Moutzouris and M. Ebrahimzadeh S. G. Ayling, 'Quantum well intermixing technologies for quasi-phase-matching gratings,' IEEE LEOS Annual Meeting, Florida, 2000. (Invited)

25- A. S. Helmy, D. C. Hutchings, T. C. Kleckner, J. H. Marsh, A. C. Bryce, J. M. Arnold, C. R. Stanley, and J. S. Aitchison, C. T. A. Brown, K. Moutzouris and M. Ebrahimzadeh, 'Quasi-phase-matching in GaAs-AlAs superlattice waveguides via bandgap tuning using quantum well intermixing,' OSA Non-Linear Optics, Hawaii, 2000.

24- J. M. Smith, G. S. Buller, A. S. Helmy, A. C. Bryce, J. H. Marsh, 'Pico-second time-resolved PL microscopy of short period impurity free vacancy disordered AlGaAs gratings,' IEEE/OSA CLEO-QELS Europe, 2000.

23- A. S. Helmy, A.C. Bryce, C.N. Ironside, J.S. Aitchison, J.H. Marsh, S.G. Ayling, 'Optical Diagnostics Of Microstructures Fabricated Using Quantum Well Intermixing,' Infrared Applications of Semiconductors III. Symposium, Mat. Res. Soc. Symp. Proc., vol. 607, P 509, Boston, 2000.

22- W. Huang, B. C. Qiu, C. Massie, A. S. Helmy, A. C. Bryce, J. H. Marsh, 'Beam steering via wavelength tuning in arrayed waveguide gratings,' IEEE/OSA CLEO-QELS Europe, 2000.

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20- J. H. Teng, S. J. Chua, Y. H. Huang, Z. H. Zhang, G. Li, A. S. Helmy, J. H. Marsh, 'Multi-wavelength lasers fabricated by a novel impurity-free quantum well intermixing technology,' International Symposium on Photonics and Applications, 1999.

19- J. H. Teng, S. J. Chud , G. Li; , A. S. Helmy , J. H. Marsh, 'Band gap tuning by a Ge interlayer in quantum well intermixing,' High Performance Electron Devices for Microwave and Optoelectronic Applications, 1999.

18- W. D. Zhou, P. Bhattacharya, J. Sabarinathan, D. H. Zhu , A. S. Helmy, J.H. Marsh, 'Processing & characterization of a GaAs/AlxOy quasi-3D photonic bandgap material,' IEEE LEOS Annual Meeting, 1999.

17- J. H. Marsh, D. Bhattacharayya, A. S. Helmy, E. A. Avrutin, A. C. Bryce, 'Engineering quantum dot lasers,' Mat. Res. Soc. Symp. Proc., 1999. (Invited)

16- D. Bhattacharayya, A. S. Helmy, A. C. Bryce, E. A. Avrutin, J.H. Marsh, 'Selective control of In0.5Ga0.5As/GaAs quantum dot properties by rapid thermal processing: quantum dot intermixing,' IEEE LEOS Summer Topical Meetings, 1999.

15- P. Dumais, A. Villeneuve, A. S. Helmy, J. S. Aitchison, Lars Friedrich, Russell A. Fuerst, George I. Stegeman, 'Intensity-dependent spatial displacement of a guided beam in an AlGaAs device below half the bandgap,' OSA Annual Meeting, Rochester, 1999.

14- P. Dumais, A. Villeneuve, A. S. Helmy, J. S. Aitchison, Lars Friedrich, Russell A. Fuerst, George I. Stegeman, 'Towards soliton emission in GaAs/AlGaAs multi-quantum-well asymmetric waveguide structures below half the bandgap,' OSA Non-Linear Guided Waves,1999.

13- A. S. Helmy, A. C. Bryce, C. N. Ironside, J. S. Aitchison, J.H. Marsh, 'Characterising Compositional Intermixing in GaAs/AlGaAs Heterostructures using Raman Spectroscopy,' IEEE/OSA CLEO, Baltimore, 1999.

12- A. S. Helmy, A. C. Bryce, C. N. Ironside, J. S. Aitchison, and J. H. Marsh, I. Gontijo, G. S. Buller, S. Karlin, I. Wilcock, 'Characterisation of the Resolution of Impurity Free Vacancy Disordering in GaAs/AlGaAs using Raman and Photoluminescence Correlation Measurements,' IEEE LEOS Annual Meeting, Florida, 1998.

11- N. P. Johnson, A. S. Helmy, A. C. Bryce, J.H. Marsh, 'Deep levels induced by impurity free vacancy disordering,' IEEE/OSA CLEO Europe, Glasgow, 1998.

10- B. S. Ooi, A. S. Helmy, Y.S. Tang, A. C. Bryce, J.H. Marsh, M. Paquette, J. Beauvais, 'Quantum well wires using As implantation induced intermixing in GaAs/AlGaAs,' IEEE/OSA CLEO Europe, Glasgow, 1998.

9- A. S. Helmy, B. S. Ooi, F. Camacho, A. C. Bryce, J. S. Aitchison, R. M. De La Rue, J. H. Marsh, 'Mach-Zehnder modulators monolithically integrated with Fabry-Perot laser diodes in GaAs/AlGaAs using impurity-free vacancy disordering,' IEEE/OSA CLEO Europe, Glasgow, 1998.

8- M. Ke, A. S. Helmy, A. C. Bryce, J.H. Marsh, J. Davidson, P. Dawson, 'The effect of non-abrupt initial interface on the electronic structure of the intermixed QWs,' IEEE/OSA CLEO Europe, Glasgow, 1998.

7- A. S. Helmy, J. S. Aitchison, J. H. Marsh, 'Kinetics of Impurity Free Vacancy Disordering in GaAs/AlGaAs,' IEEE LEOS Fall meeting, San Francisco, 1997.

6- A. S. Helmy, B. S. Ooi, F. Camacho, A. C. Bryce, J. S. Aitchison, R. M. De La Rue, J. H. Marsh, 'Mach-Zehnder modulators in GaAs/AlGaAs double quantum well structures: A regrowth-free approach for monolithic integration,' IEEE Proc. Optotelectronics Integration and Switching, 1997.

5- P. Dumais, A. Villeneuve, A. S. Helmy, C. Hamilton, J. S. Aitchison, 'Soliton emission from an AlGaAs waveguide,' Quantum Electronics and Laser Science, 1997.

4- A. S. Helmy, J. S. Aitchison, and J. H. Marsh, 'Quantifying Intermixing of GaAs/AlGaAs Quantum Confined Heterostructures,' Quantum Electronics 13, Cardiff, 1997.

3- A. S. Helmy, B. S. Ooi, A. C. Bryce, J. S. Aitchison, R. M. DeLaRue, J.H.Marsh, 'Mach-Zehnder modulators in GaAs/AlGaAs double quantum well structures: A regrowth-free approach for monolithic integration,' Semiconductor Integrated OptoElectronics, Cardiff, 1996.

2- P. Cusumano, A. S. Helmy, B. S. Ooi, S. G. Ayling, A. C. Bryce, J. H. Marsh, B. Vöegele, M. J. Rose, 'Suppression of quantum well intermixing in GaAs/AlGaAs laser structures using phosphorous-doped SiO2 encapsulant layer,' Mat. Res. Soc. Symp. Proc., vol. 450 , P 419, Boston, 1996.

1- A. S. Helmy, B. S. Ooi, J. H. Marsh, 'Investigation of the resolution limit of the hydrogen Plasma Induced Defect Layer Intermixing Process,' OSA Integrated Photonics Research 96, Boston, 1996.