Optical Properties and Wave Propagation in Semiconductor-Based Two-Dimensional Photonic Crystals
- Iowa State Univ., Ames, IA (United States)
This work is a theoretical investigation on the physical properties of semiconductor-based two-dimensional photonic crystals, in particular for what concerns systems embedded in planar dielectric waveguides (GaAs/AlGaAs, GaInAsP/InP heterostructures, and self-standing membranes) or based on macro-porous silicon. The photonic-band structure of photonic crystals and photonic-crystal slabs is numerically computed and the associated light-line problem is discussed, which points to the issue of intrinsic out-of-lane diffraction losses for the photonic bands lying above the light line. The photonic states are then classified by the group theory formalism: each mode is related to an irreducible representation of the corresponding small point group. The optical properties are investigated by means of the scattering matrix method, which numerically implements a variable-angle-reflectance experiment; comparison with experiments is also provided. The analysis of surface reflectance proves the existence of selection rules for coupling an external wave to a certain photonic mode. Such rules can be directly derived from symmetry considerations. Lastly, the control of wave propagation in weak-index contrast photonic-crystal slabs is tackled in view of designing building blocks for photonic integrated circuits. The proposed designs are found to comply with the major requirements of low-loss propagation, high and single-mode transmission. These notions are then collected to model a photonic-crystal combiner for an integrated multi-wavelength-source laser.
- Research Organization:
- Ames Lab., Ames, IA (United States)
- Sponsoring Organization:
- USDOE Office of Science (US)
- DOE Contract Number:
- W-7405-Eng-82
- OSTI ID:
- 806586
- Report Number(s):
- IS-T 2011; IS-T 2007; TRN: US0301335
- Resource Relation:
- Other Information: TH: Thesis (Ph.D.); Submitted to Universita Degli Studi di Pavia (IT); and to Iowa State Univ., Ames, IA (US); PBD: 31 Dec 2002
- Country of Publication:
- United States
- Language:
- English
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