Prof. Ngoc Diep Lai Profile

Prof. Ngoc Diep Lai

Associate Professor at Ecole normale supérieure Paris-Saclay

SPIE Involvement:

Author

Area of Expertise:

Photonic crystals , Plasmonics , Optical lithography , Nonlinear optics , Single photon source , Polymer materials

Websites:

Company Website

Profile Summary

After a PhD in Laser Physics at the University of Rennes 1 (France), Ngoc Diep LAI joined the National Chung Cheng University in Taiwan for a first postdoctorate research. His work focused on studies of nonlinear properties of polymer materials and nanotechnologies for fabrication of polymer-based photonic crystals. In 2007, he joined the "Quantum Nanophotonics" research group in the Quantum and Molecular Photonics Laboratory (LPQM),Ecole Normale Supérieure de Cachan (France). He worked towards the optimization of single photons source, coherent manipulation of single electron spin associated to color center in diamond, and superresolution imaging techniques. He is hired in 2009 at ENS Cachan as assistant professor (Maître de conférences). He obtained his HDR (Habilitation for Supervising Doctoral Research) in 2013 and became associate professor of physics. His current research focuses on optical lithography technologies for fabrication and applications of photonic, plasmonic, magnetic, nonlinear optical structures.

Publications (17)

Proceedings Article | 15 March 2023 Poster + Paper

Poster + Paper

Combining single-photon signals by deterministic coupling of CdSe/CdS quantum dots into submicropillars structures

Gia Long Ngo, Jean-Pierre Hermier, Ngoc Diep Lai

Proceedings Volume 12430, 1243010 (2023) https://doi.org/10.1117/12.2651650

KEYWORDS: Quantum dot emission, Polymers, Quantum signals, Confocal microscopy, Quantum numbers, Quantum dots, Quantum emitters, Finite-difference time-domain method, Evanescent wave coupling

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Proceedings Article | 7 March 2019 Paper

Paper

Mask lithography of 2D fluorescent magneto-photonic microstructures for biomedical and quantum applications

Amber Perry, Thi Huong Au, Duc Thien Trinh, Danh Bich Do, Stéphanie Buil, Xavier Quélin, Jean-Pierre Hermier, Ngoc Diep Lai

Proceedings Volume 10892, 1089211 (2019) https://doi.org/10.1117/12.2509446

KEYWORDS: Iron, Magnetism, Polymers, Nanoparticles, Photomasks, Nanocomposites, Lithography, Semiconductors, Photoresist materials, Biomedical optics, Quantum dots

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Proceedings Article | 4 May 2018 Paper

Paper

Coupling of a single photon source based on a colloidal semiconductor nanocrystal into polymer-based photonic structures

Thi Huong Au, Stéphanie Buil, Xavier Quélin, Jean-Pierre Hermier, Ngoc Diep Lai

Proceedings Volume 10672, 1067234 (2018) https://doi.org/10.1117/12.2306899

KEYWORDS: Polymers, Single photon, Semiconductors, Nanocrystals, Absorption, Quantum information, Quantum efficiency, Luminescence, Photonic nanostructures, Quantum dots

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Proceedings Article | 4 May 2018 Paper

Paper

Direct laser coding of plasmonic nanostructures for data storage applications

Fei Mao, Andrew Davis, Quang Cong Tong, Mai Hoang Luong, Chi Than Nguyen , Isabelle Ledoux-Rak, Ngoc Diep Lai

Proceedings Volume 10672, 106722Z (2018) https://doi.org/10.1117/12.2306762

KEYWORDS: Gold, Plasmonics, Nanoparticles, Data storage, Digital video discs, Binary data, Compact discs, Nanostructures

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SPIE Journal Paper | 1 March 2018 Open Access

Open Access

Optical lithography of three-dimensional magnetophotonic microdevices

Dam Thuy Trang Nguyen, Olivia Del Guercio, Thi Huong Au, Duc Thien Trinh, Nguyen Phuong Thao Mai, Ngoc Diep Lai

OE, Vol. 57, Issue 04, 041406, (March 2018) https://doi.org/10.1117/12.10.1117/1.OE.57.4.041406

KEYWORDS: Magnetism, Nanocomposites, Fabrication, Optical lithography, Scanning electron microscopy, Absorption, Iron, Photoresist materials, Polymers, Photonic crystals

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Proceedings Article | 20 February 2017 Presentation + Paper

Presentation + Paper

LOPA-based direct laser writing of multi-dimensional and multi-functional photonic submicrostructures

Fei Mao, Quang Cong Tong, Dam Thuy Trang Nguyen, Au Thi Huong, Rachel Odessey, Florent Saudrais, Ngoc Diep Lai

Proceedings Volume 10115, 1011509 (2017) https://doi.org/10.1117/12.2253741

KEYWORDS: Absorption, Nanoparticles, Polymers, Nanolithography, Fabrication, Photoresist materials, 3D image processing, Photonic crystals, Resonators, Magnetism, Nanocomposites, Refractive index

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Proceedings Article | 19 April 2016 Paper

Paper

Deterministic embedding of a single gold nanoparticle into polymeric microstructures by direct laser writing technique

Dam Thuy Trang Nguyen, Aurélien Pelissier, Kevin Montes, Quang Cong Tong, Hoang Minh Ngo, Isabelle Ledoux-Rak, Ngoc Diep Lai

Proceedings Volume 9884, 98842C (2016) https://doi.org/10.1117/12.2225936

KEYWORDS: Gold, Absorption, Nanoparticles, Photoresist materials, Multiphoton lithography, Fabrication, Photonic nanostructures, Polymers, Neptunium, Picosecond phenomena, Polymerization

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Proceedings Article | 18 April 2016 Paper

Paper

Fabrication of controllable form submicrometer structures on positive photoresist by one-photon absorption direct laser writing technique

Quang Cong Tong, Minh Thanh Do, Bernard Journet, Isabelle Ledoux-Rak, Ngoc Diep Lai

Proceedings Volume 9885, 988519 (2016) https://doi.org/10.1117/12.2225942

KEYWORDS: Photoresist materials, Fabrication, Absorption, Multiphoton lithography, Photonic crystals, Photonic crystal devices, Objectives, Photoresist developing, Optical properties, Finite-difference time-domain method, Polymers, Scanning electron microscopy, Continuous wave operation, Glasses

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Proceedings Article | 27 August 2014 Paper

Paper

Micro and nanostructuration of polymer materials and applications

Thi Thanh Ngan Nguyen, Mai Hoang Luong, Mai Trang Do, Duy Manh Kieu, Qinggele Li, Dam Thuy Trang Nguyen, Quang Cong Tong, Isabelle Ledoux-Rak, Ngoc Diep Lai

Proceedings Volume 9171, 91710O (2014) https://doi.org/10.1117/12.2064653

KEYWORDS: Polymers, Fabrication, Photoresist materials, Absorption, Multiphoton lithography, Laser applications, Photonic crystals, Polarization, Active optics, Laser optics

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Proceedings Article | 2 May 2014 Paper

Paper

Optimization of LOPA-based direct laser writing technique for fabrication of submicrometric polymer two- and three-dimensional structures

Mai Trang Do, Qinggele Li, Isabelle Ledoux-Rak, Ngoc Lai

Proceedings Volume 9127, 912703 (2014) https://doi.org/10.1117/12.2051910

KEYWORDS: Absorption, Fabrication, Multiphoton lithography, Polymers, 3D image processing, 3D optical data storage, Scanning electron microscopy, Photoresist materials, Polymerization, Ferroelectric materials

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Proceedings Article | 1 May 2014 Paper

Paper

Three-dimensional optical addressing by ultra low one-photon absorption microscopy

Qinggele Li, Mai Trang Do, Isabelle Ledoux-Rak, Ngoc Diep Lai

Proceedings Volume 9131, 91310Q (2014) https://doi.org/10.1117/12.2051916

KEYWORDS: Absorption, Microscopy, Light sources, Objectives, 3D image processing, Photons, Stereoscopy, Interfaces, Lenses, Pulsed laser operation

Read Abstract +

The concept of three-dimensional (3D) optical addressing based on low one-photon absorption (LOPA) microscopy is theoretically and experimentally studied in detail. The numerical calculation results show that the intensity distribution of focused light beam strongly depends on the absorption of studied materials and on the numerical aperture of employed objective lenses. Obviously, in the case of LOPA based miscroscopy, with a significant low linear absorption and tight focusing conditions, the light intensity is not affected by absorption and the focused beam shape and intensity remain almost the same everywhere inside the absorbing material. This allows to use LOPA microscopy to perform a highly resolved focusing spot in three dimensions as achieved by the two-photon absorption (TPA) technique. The theoretical calculations were then experimentally verified by focusing different light sources with different objective lenses into a Rhodamine 6G (Rh6G) solution. The experimental results show that it is impossible to realize a deep focusing inside the Rh6G solution when using a laser wavelength at 532 nm (high absorption), even if the light beam is tightly focused. In contrast, by using a light source (coherent or incoherent), emitting a wavelength located in the low absorption range of the Rh6G solution, for example, at 633 nm, the light beam can be focused deeply inside the solution, similar to the result obtained by using a pulsed laser at 1064 nm (TPA). The LOPA based microscopy presents therefore a great advantage over conventional OPA and TPA methods. Indeed, since it operates on the basis of a one-photon absorption mechanism, it does not require an expensive pulsed light source, but only a simple setup and a low-cost, low power continuous laser source, as in the case of standard OPA. It, however, allows to deal with submicrometric 3D imaging and 3D fabrication, as well as 3D data storage, with similar performances as those obtained with TPA microscopy.

Proceedings Article | 27 August 2005 Paper

Paper

Three-dimensional superresolution of focus-region of high numerical aperture objective lens: applied for multi-photon-absorption irradiation

Ngoc Diep Lai, Jian Hung Lin, Po Wen Chen, Jaw Luen Tang, Chia Chen Hsu

Proceedings Volume 5931, 593118 (2005) https://doi.org/10.1117/12.614799

KEYWORDS: 3D optical data storage, Super resolution, 3D image processing, Objectives, Photonic crystals, Data storage, Absorption, Microfabrication, 3D microstructuring, Multiphoton processes

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Proceedings Article | 27 August 2005 Paper

Paper

Rapid fabrication of large area photonic crystals containing arbitrary defects by combining the interference and multi-photon polymerization techniques

Ngoc Diep Lai, Wen Ping Liang, Jian Hung Lin, Chia Chen Hsu

Proceedings Volume 5931, 593108 (2005) https://doi.org/10.1117/12.614821

KEYWORDS: Photoresist materials, Fabrication, Photonic crystals, Polymerization, Absorption, Waveguides, Multiphoton processes, Ferroelectric materials, Polymers, Helium cadmium lasers

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Proceedings Article | 27 August 2005 Paper

Paper

Rapid fabrication of two- and three-dimensional photonic crystals using multiple-exposure of two-beam interference pattern technique

Ngoc Diep Lai, Wen Ping Liang, Jian Hung Lin, Chia Chen Hsu

Proceedings Volume 5931, 593109 (2005) https://doi.org/10.1117/12.614806

KEYWORDS: Fabrication, Photoresist materials, Photonic crystals, Absorption, Scanning electron microscopy, Polarization, Dielectric polarization, Argon ion lasers, Mirrors, Helium cadmium lasers

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Proceedings Article | 18 August 2005 Paper

Paper

Photoreactive third-harmonic generation via either one- or two-photon excitation in diarylethene-polymethylmethacrylate polymer thin films: theory and experiment

Jian Hung Lin, Ngoc Diep Lai, Wei Lin Wang, Chia Chen Hsu

Proceedings Volume 5935, 593511 (2005) https://doi.org/10.1117/12.614782

KEYWORDS: Molecules, Polarization, Absorption, Plutonium, Laser beam diagnostics, Polymer thin films, Lead, Thin films, Polymethylmethacrylate, Numerical simulations

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Proceedings Article | 1 September 2004 Paper

Paper

Generation of tunable high-purity microwave and terahertz signals by two-frequency solid state lasers

Marc Brunel, Ngoc Diep Lai, M. Vallet, Albert Le Floch, Fabien Bretenaker, Loic Morvan, Daniel Dolfi, Jean-Pierre Huignard, Stephane Blanc, Thomas Merlet

Proceedings Volume 5466, (2004) https://doi.org/10.1117/12.554782

KEYWORDS: Terahertz radiation, Crystals, Microwave radiation, Laser crystals, Solid state lasers, Tunable lasers, Birefringence, Laser resonators, Nonlinear crystals, Composites

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Proceedings Article | 17 February 2003 Paper

Paper

Building blocks for a two-frequency laser lidar-radar: concept and preliminary experimental results

Loic Morvan, N. Lai, Daniel Dolfi, Jean-Pierre Huignard, Michel Brunel, Fabien Bretenaker, Albert Le Floch

Proceedings Volume 4833, (2003) https://doi.org/10.1117/12.477520

KEYWORDS: Signal to noise ratio, Modulation, Pulsed laser operation, Radar, Optical filters, Signal detection, Optical amplifiers, Microwave radiation, Photodiodes, Interference (communication)

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Showing 5 of 17 publications

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