Study Of Optical Photonic Crystal And Low-threshold Lasing

Photonic crystal, a kind of artificial electronic-magnetic materials with periodic structure onoptical scale, can control the movement of photons efficiently, and will start a new field in opticalinformation technology and integrated photonic devices. Photonic crystal has raised a researchupsurge internationally in recent years because of its potential applications. With the developmentof micro-processing technology, holographic lithography is an efficient and convenient method infabricating photonic crystals and attracts more and more attentions of scientists. The study of howto fabricate optical photonic crystal by holographic lithography takes on great significances, whichwill pave the way for design and fabrication of micro-nano structures. In this thesis, we show thebasic theory of holographic lithography, fabricate one-dimensional layered photonic crystal anddefect mode layered superposed structure by holographic lithography, and study the photonicband-gap edge lasing phenomenon after doping dyes in the structures. We simulatetwo-dimensional superposed structure with six asymmetric beams interference by computer, thenfabricate and characterize on experiment by holographic lithography.The main works of this thesis can be summarized as follow:1. Show basic theory of holographic lithography, and fabricate one-dimensional layeredstructures in DCG emulsion with good quality photonic band-gap by holographic lithography. Thephotonic band-gap takes red-lift with the incident angle increasing. By two-step exposure, wefabricate defect mode layered superposed structure with high-quality photonic band-gap at thedouble-exposure areas.2. Simulate the two-dimensional superposed photonic crystal with asymmetry six linearpolarized beams and fabricate superposed structure composed of a periodically-repeated hexagonalpattern of hexagonal lattice cell on CHP-C positive photo-resist. The research shows that the largelattice constant becomes small with the azimuth angle of three non-adjacent beams increasing.3. Dope the organic fluorescent dyes uniformly in layered photonic crystals and observe thelasing phenomenon in photonic band-gap edge. The better agreement between dye fluorescencepeak and photonic band-gap edge, the lower lasing threshold we get. While the structure has a widephotonic band-gap, the lasing threshold is much lower.