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Pr. Gérard Aka


Academic degrees

2000: HDR, Habilitation for research supervision, Paris 6 University (UPMC)
1988: PhD Materials Sciences, Paris 6 University (UPMC)
1985: Master in Material Science, Paris 6 University (UPMC)

Main collective and official responsibilities

  • Deputy director of Chimie ParisTech, since 2006
  • Director of the LCMCP-Chimie ParisTech Laboratory, since 2012
  • Elected member of the Chimie Paristech administration council since 2001
  • Nominated member of the national (from 2000 to 2001) advisory boards (CNU) for solid State Chemistry (section 33) in charge of the appointments and promotions of academics
  • Member of Optical Society of America (OSA)
  • International Scientific Committee Board Member of the OSA Optics and Photonics Congress - Advanced in Optical Materials (AIOM)-, since 2011
  • Expert of JSPS (The Japan Society for the Promotion of Science)

Research fields

  • Solid state reaction of optical materials based oxides
  • Czochralski and flux growth of solid state laser and non linear optical materials 
  • X-ray diffraction, thermal analysis, thermal conductivity properties
  • Absorption, fluorescence spectroscopy
  • Non linear and laser characterization of optical materials
  • 2 patents, 110 publications in ISI referenced international journals, 166 communications (of which, 17 invited international lectures). h index: 23. 1935 citations.

Teaching in structure and properties of Matter

Structure and properties of matter (master degree): Solid State Chemistry, defects in solid, crystal growth technique of bulk materials. Crystallography and diffraction. Quantum Mechanic


Pascal Loiseau (associated Prof.), Lihe Zheng (Postdoc scholar), Simon Ilas (PhD student), Federico. Khaled (PhD Student), A. Jaffres (PhD student).

Recent papers

  • First measurement of the nonlinear coefficient for Gd1-xLuxCa4O(BO3)3 and Gd1-xScxCa4O(BO3)3 crystals. Optics Express, Vol. 15 Issue: 8, 2007, pp. 4893-4901
  • Blue laser emission by intracavity second harmonic generation in Nd: ASL pumped by a tapered amplifier laser diode stabilized by a volume Bragg grating. Applied Physics B-Laser and Optics, Vol. 92 Issue: 2, 2008, pp. 189-193.
  • Nonlinear optical properties of Ca5(BO3)3F crystal. Optics Express Vol. 16 Issue: 22, 2008 pp. 17735-17744.
  •  Laser and self-doubling properties of a Nd:YCOB crystal cut as a sphere and inserted in a cavity. J. Opt. Soc. Am. B: optical physics, Vol 28, issue 4, 2009, pp. 750-753.
  • Efficient continuous-wave thin disk laser operation of Yb:Ca4YO(BO3)3 in E parallel to Z and E parallel to X orientations with 26 W output power. J. Opt. Soc. Am. B: optical physics, Vol 26, issue 7, 2009, pp. 1310-1314.
  • Singular topology of optical absorption in biaxial crystals. Optics Express Vol. 17 Issue: 22, 2009 pp. 19868-19873. 
  • Crystal defects revealed by Schlieren photography and chemical etching in nonlinear single crystal LYSB, Optical Materials Express 1(8), (2011) 1569-1576.
  • Spectroscopic features and laser performance at 1.06 µm of Nd3+-doped Gd1-xLuxCa4O(BO3)(3) single crystal, Journal of Applied Physics, 111(1) (2012) DOI: 10.1063/1.3673801.

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Gérard Aka
Gérard Aka


Gérard Aka , Professor (PREX) of Solid State Chemistry

Chimie ParisTech
École Nationale Supérieure de Chimie de Paris
Institut de Recherche de Chimie de Paris

11 rue Pierre et Marie Curie
75231 PARIS cedex 05, FRANCE