W. R. Frei

Designing an improved photonic crystal waveguide termination by topology optimization

Daniel A. Tortorelli, W. R. Frei, Harley T Johnson, 2005, SPIE Optics + Photonics.

Topology optimization of a photonic crystal waveguide termination to maximize directional emission

W. R. Frei, D. Tortorelli, H. Johnson, 2005 .

Geometry projection method for optimizing photonic nanostructures.

W. R. Frei, D. Tortorelli, H. Johnson, 2007, Optics letters.

Optimization of photonic nanostructures

W. R. Frei, D. Tortorelli, H. Johnson, 2008 .

Finite-element analysis of disorder effects in photonic crystals

W. R. Frei, Harley T Johnson, H. Johnson, 2004 .

Optimization of a single defect photonic crystal laser cavity

Kent D. Choquette, W. R. Frei, Harley T Johnson, 2008 .

Transformation of hydrogel-based inverse opal photonic sensors from FCC to L1(1) during swelling.

W. R. Frei, H. Johnson, P. Braun, 2006, The journal of physical chemistry. B.