13 papers
Diagonalizing an optical coherence matrix via on-chip Stokes tomography
Amin Hashemi, Abbas Shiri, Bahaa E. A. Saleh +2
Structured coherence -- partially coherent light spanned by a finite number of modes -- is emerging as a powerful tool in optical communications, computation, cryptography, and spe…
Pitch-controlled reorientational nonlinearity in chiral nematic liquid crystals: a reduced-order model for self-focusing and soliton formation
Homa Saadatmand, M. Javad Zakeri, Ahmed Sameh Ahmed +6
We present a reduced-order semi-analytical model for reorientational nonlinearity in chiral nematic liquid crystals, showing that the chiral pitch acts as the dominant physical len…
On-chip measurement of the modal Stokes-Gell-Mann parameters for partially coherent three-mode light
Amin Hashemi, Abbas Shiri, Bahaa E. A. Saleh +2
The Stokes parameters are three real parameters that completely characterize partially coherent optical fields spanned by two modes -- whether a pair of polarization or spatial mod…
Incoherence-assisted mode excitation in non-Hermitian resonant systems
Amin Hashemi, Vinzenz Zimmermann, Armando Perez-Leija +1
We introduce and experimentally demonstrate an approach for selective mode excitation in non-Hermitian resonant systems using incoherent light. This method eliminates the need for…
On-chip control of the coherence matrix of four-mode partially coherent light: rank, entropy, and modal Stokes parameters
Amin Hashemi, Abbas Shiri, Bahaa E. A. Saleh +2
Partially coherent light offers salutary capabilities in optical information processing that cannot be matched by coherent light. To date, this `coherence advantage' has been confi…
Programmable on-chip synthesis and reconstruction of partially coherent two-mode optical fields
Amin Hashemi, Abbas Shiri, Bahaa E. A. Saleh +2
Partially coherent light is typically studied in the context of freely propagating continuous fields. Recent developments have indicated the existence of a `coherence advantage' in…