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Dr. Le Quang Khai

Le-Quang-Khai

Full-time researcher of Division of Computational Physics

H-Index (Scopus): 13; Citation (Scopus): > 782


 

1. EDUCATIONAL BACKGROUND

  • Bachelor of Physics, University of Science –Vietnam National University – HCMC, 2005.
  • PhD of Photonics Engineering, Ghent University, Belgium, 2011.

2. WORKING HISTORY

  • From 2011 to 2012: Postdoc of Department of Electrical and Computer Engineering, University of Texas at Austin, USA.
  • From 2012 to 2013: Postdoc of Department of Physics, University of Toronto, Canada.
  • From 2014 to 2015: Visiting Assistant Professor of Department of Electrical Engineering, University of Minnesota Duluth, MN, USA.
  • From 2013 to 2017: Dean of Faculty of Science and Technology, Hoa Sen University, Vietnam.
  • From 10/2015 to 12/2015: Visiting Professor of Physics Department, Jazan University, Saudi Arabia.
  • From 2016 to 2018: Postdoc of Institute for Molecular Science, Japan.
  • From 2017 to now: Full -time researcher of Institute for Computational Science, Ton Duc Thang University, HCMC - Vietnam.


3. RESEARCH INTERESTS

  • Nanoplasmonic and nanophotonic enhancement of thin-film solar cells;
  • Plasmon-enhanced molecular fluorescence;
  • Optical and acoustic metamaterials;
  • Numerical techniques for guided-wave photonics;
  • Lab-on-a-chip label-free optical biosensors;
  • Design and simulation of quantum cascade lasers.

4. RESEARCH PROJECTS

[2]. Engineered metallic nanostructures for plasmonic enhancement of optical biological detection sensitivity and molecular fluorescence, (Principal Investigator, 103.03-2017.32), National Foundation for Science and Technology Development (NAFOSTED), from 2018 to 2020 (Ongoing).

[1]. Solutions for enhanced transmission efficiency at the plasmonic Brewster channel and its applications in   solar energy harvesting, (Principal Investigator, 103.03-2014.08), National Foundation for Science and Technology Development (NAFOSTED), from 2015 to 2017 (Completed).

5. PUBLICATIONS

  • Journals: 

[58]. Khai Q. Le, and H. D. Ngo, Photoluminescence spectroscopy of Rhodamine 800 aqueous solution and dye-doped polymer thin-film: Concentration and solvent effects, Journal of Electronic Materials, (2018) (ISI)

[57]. Khai Q. Le, Enhanced circular dichroism via symmetry breaking in a chiral plasmonic nanoparticle oligomer, Journal of Electronic Materials, 47: 2836-2840, (2018) (ISI)     

[56]. V. A. Nguyen, Q. M. Ngo, and Khai Q. Le, Efficient color filters based on Fano-like guided-mode resonances in photonic crystal slabs, IEEE Photonics Journal, 10: 1-8, (2018) (ISI)   

[55]. H. T. Trang, Q. M. Ngo, D. L. Vu, Khai Q. Le, T. K. Nguyen, and H. P. T. Nguyen, Induced high-order resonance linewidth shrinking with multiple coupled resonators in silicon-organic hybrid slotted two-dimensional photonic crystals for reduced optical switching power in bistable devices, Journal of Nanophotonics, 12: 016014, (2018) (ISI)

[54]. Khai Q. Le, Dual-blade-like shaped nanostructured metasurface inducing dual-band extinction for dye fluorescence enhancement, Journal of Applied Physics, 123: 043104, (2018) (ISI)  

[53]. Phuc Toan Dang, Thi Pham Tan, Khai Q. Le, and Truong Khang Nguyen, Epsilon-near-zero enhanced plasmonic Brewster transmission through tapered metallic gratings, Journal of The Korean Physical Society, 72: 38-44, (2018) (ISI)

[52]. M. R. Philip, D. D. Choudhary, M. Djavid, M. N. Bhuyian, D. Misra, A. Khreishah, H.-D. Nguyen, Khai Q. Le, and H. P. T. Nguyen, Fabrication of Phosphor-Free III-Nitride nanowire light- emitting diodes on metal substrates: Direct substrate -transferring approach for flexible photonics, ACS Omega, 2: 5708-5714, (2017) (ISI)

[51]. Khai Q. Le, Fano-induced circular dichroism in three dimensional plasmonic chiral metamolecules, Journal of Electronic Materials, 46: 5577-5581, (2017) (ISI)

[50]. M. R. Philip, D. D. Choudhary, M. Djavid, Khai Q. Le, J. Piao and H. P. T. Nguyen, High-efficiency green/yellow and red InGaN/AlGaN nanowire light-emitting diodes grown by molecular beam epitaxy, Journal of Science: Advanced Materials and Devices, 150-155, (2017) (ISI)

[49]. Truong Khang Nguyen, Truong Duy Le, Phuc Toan Dang, and Khai Q. Le, Asymmetrically engineered nanodisk clusters for plasmonic Fano resonance generation, Journal of Optical Society of America B, 34(3): 668-672, (2017) (ISI)

[48]. Truong Khang Nguyen, Phuc Toan Dang, Ikmo Park and Khai Q. Le, Broadband THz radiation through tapered semiconductor grating on high-index substrate, Journal of Optical Society of America B, 34(3): 583-589, (2017) (ISI)

[47]. Khai Q. Le, Quang Minh Ngo, and Truong Khang Nguyen, Nanostructured metal-insulator-metal etamaterials for refractive index biosensing applications: Design, fabrication, and characterization, IEEE Journal of Selected Topics in Quantum Electronics, 23: 6900506, (2017) (ISI)

[46]. Truong Khang Nguyen, Phuc Toan Dang and Khai Q. Le, Numerical design of thin Perovskite solar cells with fiber array-based anti¬reflection front electrode forlight-trapping enhancement, IOP Journal of Optics, 18: 125901, (2017) (ISI)

[45]. Khai Q. Le, J. Bai, Quang Minh Ngo, Pai- Yen Chen, Fabrication and numerical characterization of infrared metamaterial absorbers for refractometric biosensors, Journal of Electronic Materials, 46: 668-676, (2017) (ISI)

[44]. Phuc Toan Dang, Truong Khang Nguyen and Khai Q. Le, Revisited design optimization of metallic gratings for light-trapping enhancement in thin organic solar cells, Optics Communications, 382: 241-245, (2016) (ISI)

[43]. Khai Q. Le, and Quang Minh Ngo, A silicon-on-insulator surface plasmon interferometer for hydrogen detection, Journal of Applied Physics, 120(4): 043106, (2016) (ISI)

[42]. J. Bai, H. Wang, Q. Wang, D. Zhou, Khai Q. Le, and B. Wang, Coherent Pulse Progression of Mid-infrared Quantum-Cascade Lasers Under Group-Velocity Dispersion and Self-Phase Modulation, IEEE Journal of Quantum Electronics, 52(9): 2300106, (2016) (ISI)

[41]. Khai Q. Le, Truong Khang Nguyen, A. Canimoglu, and N. Can, Broadband luminescence of Cu nanoparticles fabricated in SiO2 by ion implantation, Applied Radiation and Isotopes, 115: 109-112, (2016) (ISI)

[40]. Khai Q. Le, H. P. T. Nguyen, Ngo Quang Minh, and N. Can, Experimental and numericaloptical characterization of plasmonic copper nanoparticles fabricated in ZnO by ion implantation and annealing, Journal of Alloys and Compounds,  669: 246-253, (2016) (ISI)

[39]. Khai Q. Le, J. Bai and H. P. T. Nguyen, Fano-induced spontaneous emission enhancement of molecule placed in a cluster of asymmetrically-arranged metallic nanoparticles, Journal of Luminescence, 173: 199-202, (2016) (ISI) 

[38]. M. Farhat, T. C. Cheng, Khai Q. Le, M. M. C. Cheng, H. Bagci, and Pai-Yen Chen, Mirror-backed dark Alumina: A nearly perfect absorber for Thermoelectronics and thermophotovoltaics, Scientific Reports, 6: 19984, (2016) (ISI) 

[37]. Pai-Yen Chen, Khai Q. Le and A. Alu, Nonlinear nanocircuitry basedon quantum tunneling effects, MRS Communications, 5: 565-571, (2015) (Scopus)

[36]. M. Farhat, Mark M. C. Cheng, Khai Q. Le, and Pai-Yen Chen, Quantum-nanoantenna harmonic sensor: Contactless detection of molecule with light, Nanotechnology, 26: 415201, (2015) (ISI) 

[35]. Khai Q. Le, Jing Bai, and Pai-Yen Chen, Dielectric antireflection fiber arrays for absorption enhancement in thin organic tandem solar cells, IEEE Journal of Selected Topics in Quantum Electronics, 22: 4100406, (2015) (ISI) 

[34]. T. T. Hoang, Khai Q. Le, Ngo Quang Minh, Surface plasmon-assisted optical bistability/ switching in nonlinear dielectric gratings, Current Applied Physics, 15: 987-992, (2015) (ISI) 

[33]. Khai Q. Le, and J. Bai, Enhanced absorption efficiency of ultrathin metamaterial absorbers by plasmonic Fano resonance, Journal of Optical Society of America B, 32: 595-600, (2015) (ISI)

[32]. Khai Q. Le, M. Nixon, and J. Bai, Calibrated dielectric fiber arrays for light-trapping enhancement in organic solar cells, IEEE Journal of Photovoltaics, 5: 1125-1129, (2015) (ISI) 

[31]. Khai Q. Le, A. Alu, and J. Bai, Multiple Fano resonances inplasmonic metamolecules consisting of asymmetric metallic dimers, Journal of Applied Physics, 117: 023118, (2015) (ISI) 

[30]. Ngo Quang Minh, Khai Q. Le, Dinh-Lam Vu, Van-Hoi Pham, Numerical investigation of tunable Fano-based optical bistability in coupled nonlinear gratings, Optics Communications, 338: 528-533, (2015) (ISI) 

[29]. Khai Q. Le, Nanoplasmonic enhancement of molecular fluorescence: theory and modelling, Plasmonics, 10: 475-482, (2015) (ISI) 

[28]. Khai Q. Le, A. Alu, Fano induced solar absorption enhancement in thin organic photovoltaic cells, Applied Physics Letters, 105: 141118, (2014) (ISI) 

[27]. Khai Q. Le, Broadband and polarization-insensitive solar absorption enhancement in thin organic solar cells using metallic nanopillars, IEEE Journal of Photovoltaics, 4: 1566-1569, (2014) (ISI)

[26]. Ngo Quang Minh, Khai Q. Le*, Dinh-Lam Vu, Van-Hoi Pham, Optical bistability based on Fano resonances in single- and double-layer nonlinear slab waveguide gratings, Journal of Optical Society of America B, 31: 1054-1061, (2014) (ISI)

[25]. Khai Q. Le, Enhanced plasmonic Brewster transmission through metascreens by tapered slits, Journal of Applied Physics, 115: 033110, (2014) (ISI)

[24]. Khai Q. Le and S. John, Synergistic plasmonic and photonic crystal light- trapping: Architectures for optical up-conversion in thin-film solar cells, Optics Express, 22 (S1): A1-A12,  (2014) (ISI)

[23]. Khai Q. Le, Broadband light trapping in thin organic photovoltaic cells using plasmonic resonant antennas, Journal of Applied Physics, 114: 084504, (2013) (ISI)

[22]. F. Shafiei, F. Monticone, Khai Q. Le, Xing X. Liu, T. Hartsfield, A. Alu, and X. Li, A subwavelengthplasmonic metamolecule exhibiting magnetics- based optical Fano resonances, Nature Nanotechnology, 8: 95-99, (2013) (ISI) 

[21]. C. Argyropoulos, Khai Q. Le, N. Mattiucci, G. D’Aguanno and A. Alu, Broadband absorbers and selective emitters based on plasmonic Brewster Metasurfaces, Physical Review B, 87: 205112, (2013) (ISI) 

[20]. G. D’Aguanno, Khai Q. Le, R. Trimm, A. Alu, N. Mattiucci, A. D. Mathias, N. Akozbek, and M. J. Bloemer, Broadband metamaterial for nonresonant matching of acoustic wave, Nature Scientific Reports, 2: 340, (2012) (ISI) 

[19]. Khai Q. Le, and A. Alu, Broadband Brewster Transmission through 2D Metallic Gratings, Journal of Applied Physics, 112(9): 094317-094321, (2012) (ISI) 

[18]. Khai Q. Le, C. Argyropoulos and A. Alu, Plasmonic Brewster transmission in photonic gratings and crystals, Proceedings of SPIE, 8423: 842313, (2012) (Scopus) 

[17]. Quang Minh Ngo, Khai Q. Le*, and Vu Dinh Lam, Optical bistability based on guided-mode resonances in photonic crystal slabs, Journal of Optical Society of America B, 29 (6): 1291-1295, (2012) (ISI) 

[16]. A. Abass, Khai Q. Le, A. Alu, M. Burgelman, and B. Maes, Dual-Interface Gratings for Broadband bsorption Enhancement in Thin-Film Solar Cells, Physical Review B, 85: 115449, (2012) (ISI) 

[15]. Khai Q. Le, A. Abass, B. Maes, P. Bienstman, and A. Alu, Comparing plasmonic and dielectric gratings for absorption enhancement in thin-film organic solar cells, Optics Express, 20(S1): A39-A50, (2012) (ISI) 

[14]. Khai Q. Le, and P. Bienstman, Enhanced sensitivity of silicon-on-insulator surface plasmon interferometer with additional dielectric layer, IEEE Photonics Journal, 3(3): 538-545, (2011) (ISI) 

[13]. Khai Q. Le, and P. Bienstman, Optical modeling of plasmonic nanoparticles enhanced light emission, Plasmonics, 6(1): 53-57, (2011) (ISI) 

[12]. Khai Q. Le and P. Bienstman, Pade approximate solution for wave propagation in graded-index metamaterials, Journal of Optics, 13(2): 024015, (2010) (ISI) 

[11]. Khai Q. Le, and P. Bienstma, A stable complex Jacobi iterative solution of 3D semivectorial beam propagation using the iterated Crank-Nicholson method, Optical and Quantum Electronics, 41(4): 215-221, (2010) (ISI) 

[10]. Khai Q. Le, and P. Bienstma,  The complex Jacobi iterative method for non- paraxial beam propagation in nonlinear optical waveguides, Optical and Quantum Electronics, 41(9): 705-709, (2010) (ISI) 

[9]. Khai Q. Le, and P. Bienstma, A 3D higher-order Pade- approximant-based wide- angle beam propagation method using complex Jacobi iteration, Electronics Letters, 46(3): 231-233, (2010) (ISI)

[8]. Khai Q. Le, Trevor Benson and P. Bienstman, Application of modified Pade approximant operators for time-domain beam propagation methods, Journal of Optical Society of America B, 26(12): 2285-2289, (2009) (ISI) 

[7]. Khai Q. Le, and P. Bienstma, Fast 3D generalized rectangular wide-angle beam propagation method using complex Jacobi iteration, Journal of Optical Society of America B, 26(7): 1469-1472, (2009) (ISI) 

[6]. Khai Q. Le, and P. Bienstma, Wide-angle beam propagation method without using slowly varying envelope approximation, Journal of Optical Society of America B, 26(2): 353-356, (2009) (ISI)

[5]. Khai Q. Le, Complex Pade approximant operators for wide-angle beam propagation, Optics Communications, 282(7): 1252-1254, (2009) (ISI)

[4]. Khai Q. Le, Design of type-II interband cascade lasers for THz emission, Optical and Quantum Electronics, 40(13): 973-981, (2009) (ISI)

[3]. Khai Q. Le, R. Godoy- Rubio, P. Bienstman, G. Ronald Hadley, The complex Jacobi iterative method for three¬dimensional wide-angle beam propagation, Optics Express, 16(21): 17021-17030, (2008) (ISI) 

[2]. Khai Q. Le, Finite element analysis of quantum states in layered quantum semiconductor structures with band nonparabolicity effect, Microwave and Optical Technology Letters, 51(1): 1-5, (2008) (ISI) 

[1]. Khai Q. Le and Sangin Kim, Model for cross-plane thermal conductivity of layered quantum semiconductor structures and application for thermal modeling of InGaAs/AlInAs-based quantum cascade lasers, Physica Status Solidi A, 205(2): 392, (2008) (ISI) 

  • Conferences: 

[32]. Khai Q. Le, and H. O., Circular polarization dissymmetry of two-photon-induced photoluminescence from chiral plasmonic nanostructured metasurfaces, Optical Manipulation and Structured Materials Conference, Yokohama, Japan, 2018. (oral talk).

[31]. Khai Q. Le, and H. O., Strong local optical chirality of chiral plasmonic nanostructures under linearly polarized excitation, the 65th JSAP Spring Meeting, Tokyo, Japan, 2018. (oral talk).

[30]. Khai Q. Le, and H. O., Dissymmetry between left- and right-handed circularly polarized photoluminescence enhancement of plasmonic nanostructure, JSAP-OSA Joint Symposia, 5a_A410_2, Fukuoka, Japan, 2017. (oral talk).

[29]. Truong Khang Nguyen, Khai Q. Le, and Ikmo Park, Broadband terahertz radiation through a one-dimensional grating with a tapered slit on a high-index substrate, IEEE Antennas and Propagation Society International Symposium, Puerto Rico, 2016.

[28]. J. Bai, H. Wang, Q. Wang, D. Zhou, Khai Q. Le, and B. Wang, Coherent Pulse Propagation in Mid-infrared Quantum-Cascade Lasers with Nonlinear Dispersive Gain Medium, Mid-Infrared Coherent Sources, Long Beach, CA, USA, 2016.

[27]. Phuc Toan Dang, Ngo Hai Dang, Nguyen Van Khoe and Khai Q. Le, Improved optical transmission through tapered metallic gratings at the plasmonic Brewster channel, International Workshop on Nonlinear Optics and Novel Materials, Vinh, Nghe An, Vietnamm 2016.

[26]. Truong Duy Le, Khai Q. Le, Quang Minh Ngo, and Truong Khang Nguyen, Fano resonant metamolecule consisting of asymmetric metallic nanodimers for biosensing applications at the nanoscale, International Workshop on Nonlinear Optics and Novel Materials, Vinh, Nghe An, Vietnam, 2016.

[25]. D. J. Ironside, R. Salas, P. Y. Chen, Khai Q. Le, A. Alù, S. R. Bank, Employing Metamaterials for Enhanced THz Generation in Photomixers, 2014 IEEE Photonics Conference, San Diego, CA, USA, 2014.

[24]. F. Shafiei, F. Monticone, Khai Q. Le, Xing X. Liu, T. Hartsfield, A. Alù, and X. Li, Plasmonic magnetic nanostructures, 2014 American Physical Society March Meeting, Denver, CO, USA, 2014.

[23]. Khai Q. Le, Plasmonic and metamaterial nanostructures for enhanced solar light-trapping, light-emitting and optical biosensing, invited lecture at Department of Physics, National Chiao Tung University, Hsinchu, Taiwan, 2013.

[22]. F. Shafiei, Khai Q. Le, F. Monticone, Xing X. Liu, T. Hartsfield, A. Alù, and X. Li, A subwavelength magnetic metamolecule, 2013 American Physical Society March Meeting, Baltimore, MA, USA, 2013.

[21]. G. D’Aguanno, Khai Q. Le, A. Alù, N. Mattiucci, Broadband sound concentration and focusing at the Intromission angle of an acoustic metamaterial, Euronoise 2012, Prague, Czech Republic, 2012.

[20]. A. Alù, C. Argyropoulos, Khai Q. Le, Plasmonic Brewster angle for broadband absorption, enhanced nonlinearities, and directional emitters, SPIE Photonics Europe 2012, Brussels, Belgium, 2012. (invited talk).

[19]. Khai Q. Le, and A. Alù, Plasmonic gratings for enhanced light-trapping in thin-film organic solar cells, CLEO 2012, San Jose, CA, USA, 2012.

[18]. Khai Q. Le, A. Abass, B. Maes, P. Bienstman, and A. Alù, Using localized plasmon resonances to enhance absorption efficiency in thin-film organic solar cells, Optical Nanostructures and Advanced Materials for Photovoltaics, Austin, Texas, USA, 2011.

[17]. A. Abass, Khai Q. Le, B. Maes, P. Bienstman, A. Alù, and M. Burgelman, Combining front and back grating structures for broadband absorption enhancement in thin-film silicon solar cells, Optical Nanostructures and Advanced Materials for Photovoltaics, Austin, Texas, USA, 2011.

[16]. Khai Q. Le, A. Abass, B. Maes, P. Bienstman, Plasmonic nanoantennas for absorption enhancement in thin-film silicon solar cells, 3rd NANOMETA, Tirol, Austria, 2011.

[15]. Khai Q. Le, and P. Bienstman, Nanoplasmonic ring resonator for biosensing applications, 15th Annual Symposium of the IEEE Photonics Benelux Chapter, Deft, Netherlands, 2010.

[14]. Khai Q. Le, A. Abass, B. Maes, P. Bienstman, Analytical study of enhanced optical absorption of molecules near silver nanoparticles, Optical Nanostructures for Photovoltaics, Germany, 2010.

[13]. Khai Q. Le, Trevor Benson, P. Bienstman, Modified Padé Approximant Operators for Efficient Time-Domain Beam Propagators, 19th International Workshop on Optical Waveguide Theory and Numerical Modelling, United Kingdom, 2010.

[12]. Khai Q. Le, B. Maes and P. Bienstman, Numerical Study of Plasmonic Nanoparticles Enhanced Light Emission in Silicon Light-Emitting Diodes, 15th European Conference on Integrated Optics, United Kingdom, 2010.

[11]. Khai Q. Le, and P. Bienstman, Enhanced Sensitivity of Absorption-Based Surface Plasmon Interference Sensors in Silicon-On-Insulator by Adsorbed Layer, 15th European Conference on Integrated Optics, United Kingdom, 2010.

[10]. Khai Q. Le, P. Bienstman, Enhanced Sensitivity of Silicon-On-Insulator Surface Plasmon Interference Biosensors with Additional Silicon Top Layer, 11th FirW PhD Symposium, Belgium, 2010.

[9]. Khai Q. Le, Harshana G. Dantanarayana, Elena A. Romanova, Trevor Benson, and P. Bienstman, Comparative Assessment of Time-Domain Models of Nonlinear Optical Propagation, 3rd ICTON-MW, France, 2009.

[8]. Khai Q. Le, and P. Bienstman, Modeling the optical properties of metallic nanoparticles, 14th Annual Symposium of the IEEE Photonics Benelux Chapter, Belgium, Belgium, 2009.

[7]. Khai Q. Le, and P. Bienstman, Non-paraxial beam propagation in nonlinear optical waveguides using complex Jacobi iteration, 9th International Conference on Numerical Simulation of Optoelectronic Devices, Gwangju, Korea, 14-18th September, 2009.

[6]. Khai Q. Le, P. Bienstman and G. R. Hadey, Fast wide-angle BPMs using complex Jacobi iteration, 18th International Workshop on Optical Waveguide Theory and Numerical Modelling, , Jena, Germany, 17-18th April, 2009.

[5]. Khai Q. Le, P. Bienstman, Modified Padé-approximant-based wide-angle beam propagators, 10th FirW PhD Symposium, Belgium, 2009.

[4]. Khai Q. Le, R. Godoy-Rubio, P. Bienstman and G. R. Hadey, 3D non-paraxial BPM using complex Jacobi iteration, 13th LEOS Benelux Student Chapter Symposium, Enschende, Netherlands, 27-28th November 2008.

[3]. Khai Q. Le, R. Godoy-Rubio, P. Bienstman and G. R. Hadley, 3D non-paraxial BPM using complex Jacobi iteration, The International Workshop on photonics and applications, 9-14 September 2008, Nha Trang, Vietnam.

[2]. L. Q. Khai and Sangin Kim, A novel band structure calculation for the quantum cascade lasers with conduction band nonparabolicity effect, 9th International Conference on Intersubband Transitions in Quantum Wells, Ambleside, U.K, 9 –14 September 2007.

[1]. Le Quang Khai and Sangin Kim, A novel calculation of the quantum states in the quantum cascade laser structures, 8th International Conference on Mid-Infrared Optoelectronics: Materials and Devices, Bad Ischl, Austria, Poster 4, 14-16 May 2007.

6. AWARDS

[1] Faculty Research of Exellence, Hoa Sen University, 2014

[2] Faculty Research of Exellence, Hoa Sen University, 2015