Jiang, Wei

Department(s): IAMDN Executive Committee
                         Electrical and Computer Engineering
Research Interests:  developing novel photonic devices for communications, sensing, beam steering and other applications
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Telephone: 732-445-2164


Research Interests

  • Silicon nanophotonics: modulators, switches, light emission
  • Photonic crystals: devices & physics (e.g. slow light, superprism)
  • Silicon photonic microsystems: optical phased arrays, spatial light modulators, on-chip optical interconnects, optical information processing microsystems.
  • Nanoimprint and molding
  • Plasmonics and metamaterials; disordered and quasi-periodic media
  • Other interests: polymer photonics; fiber optics; laser beam steering;gratings; liquid crystals; phased array antennas.


Parity & Time Reversal Symmetry in Multi-dimensional Photonic Crystals
  • Symmetry plays important roles in designing photonic crystal structures and devices or, more generally, 2D/3D photonic synthetic structures.
  • Even-Odd mode-symmetry/parity transform in PCWs shows the potential of breaking time-reversal symmetry, enabling one-way waveguidesor optical isolators.
  • Symmetry-induced singularities can lead to ultra-high sensitivities in superprism effects whilemaintaining low loss.
  • Symmetrical structures can enable a class of novel wavelength-division-multiplexing (WDM) devices.
  • Provisional Patent filed.


Slow light Thermo-optic Switches
  • Power consumption and spatial temperature profile are found as explicit functions of structural, thermal and optical parameters
  • Agree with FEM simulations and experiments
  • Air-bridge (membrane) configuration is shown to enhance the temperature rise compared to the SOI structure.
  • Scaling of power consumption with key parameters (buried oxide layer thickness, heater location & width, group index, etc.)
  • Practical analysis of slow light loss in photonic crystal waveguide switches
  • Sub-milliwatt switching power is possible
  • Substrate effect can be precisely modeled


Dual racetrack Si micro-resonators for quadrature amplitude modulation
  • Strong coherent cross-coupling between two parallel racetrack micro-resonators
  • In over-coupling scenario, there is a delicate balance between the direct sum and “interactions” of two resonances
  • Large amplitude & phase modulation ranges
  • Suitable for arbitrary quadrature amplitude modulation (including DPSK, QPSK, 16-QAM, etc.)
  • Resilient against fabrication imperfections