Post-docs and PhD positions in Strong field optoelectronics and light induced topology - CEA Saclay

1) Post-doc&PhD in Strong field Optoelectronics - PETACOM project (
Optoelectronics is extending to the highly non-linear regime. 2D and 3D semiconductors exhibits properties
of high electron mobility that allows to drive attosecond electrons currents in the conduction band when
submit to a strong laser field. A recent impact of this capability is the emergence of high harmonic generation
in semiconductors. The project will focus in the strong localization in time, at the single optical cycle, of the
harmonic generation process. This control will be used to prepare a new generation of petahertz opto-
electronic devices. Based on our group expertise, experimental and theoretical resources, the fellow will
seek for efficient ways to control on attosecond time scale the harmonic emission. CEP studies of the
harmonic emission correlated to the petahertz electron current will be performed. The candidate will
develop scheme for the generation of isolated attosecond pulses using intrinsic and extrinsic HHG control
on such materials.

2) Post-doc&PhD in Light induced topology – OPTOLOGIC Project (
The project takes place within the OPTOLOGIC European project that proposes to use structured light to
write/read topological states, possibly at optical-cycle speeds (THz-PHz), to store and process quantum
information. The candidate will study the valley-dependent optical selection rules that arise through the
strong spin-orbit coupling and broken inversion symmetry using structured light pulses carrying “Spin Angular
Momentum-Orbital Angular Momentum (SAM-OAM). Temporally and spatially structured light pulses will be
used to transfer momentum and spin to a 2D hexagonal material (TMDCs). High harmonic generation (HHG)
provides also a relevant observable and can be performed simultaneously to electron spectro-microscopy in
the momentum space (K-PEEM). Observables for the emergence and presence of a topological state is the
alteration of the electronic properties of the material; in this respect, we know that HHG provides a
sensitive measure of the Berry curvature and of the material susceptibility. Combining these findings with
HHG and K-PEEM observables, we intend to show experimentally that Qubits can be encoded without
electronic excitation using shaped light beams.

Positions conditions: The candidate should have solid skills in one or more fields: strong-field physics, HHG
spectroscopy, photo-electron spectroscopy, ultrafast condensed matter, ultrafast laser science. Post-doc
candidates have to demonstrate, we require autonomy, creativity and leadership (please provide at least 2
letters of recommendation, a motivation letter, a list of publication). PhD candidate should provide a detail
of their marks, rank, topics, a motivation letter and at least two professors contacts. Salary is in a range
between 2200-2800 euros net/month for a post-doc and 1400-1600 net/month for a PhD depending on the
fellow expertise/ experience.

CEA-Saclay (20 km south of Paris). LIDYL Laboratory
Starting date : January/February/March 2021
Contact person : Hamed Merdji
e-mail :