Kyoto University

Kyoto Institute of Technology

Masako Yone

Susumu Noda

Kyoko Kitamura

A photonic crystal laseris a laser that has a configuration, in which a light emitting layer (an active layer) that generates light including light of wavelength &#x3bb;, and a two-dimensional photonic crystal layerincluding different refractive index regions (holes) disposed two-dimensionally on a plate-like base materialthe different refractive index regions having a refractive index different from a refractive index of the base material, so that a refractive index distribution is formed, are stacked. Each different refractive index region in the two-dimensional photonic crystal layeris disposed at a position shifted from each lattice point of a basic two-dimensional lattice that has periodicity defined to generate a resonant state of light of the wavelength &#x3bb;by forming a two-dimensional standing wave and not to emit light of the wavelength &#x3bb;to outside. A positional shift vector &#x394;r&#x2191; representing the shift of the position of the different refractive index region at the each lattice point from the lattice point is expressed by&#x394;&#xb7;sin(&#xb1;)&#xb7;(cos((&#x3c6;+&#x3c6;)), sin((&#x3c6;+&#x3c6;))) by using a wave number vector k&#x2191;=(k, k) of light of the wavelength &#x3bb;in the two-dimensional photonic crystal layeran effective refractive index nof the two-dimensional photonic crystal layer, an azimuth angle &#x3c6; from a predetermined reference line extending in a predetermined direction from a predetermined origin of the basic two-dimensional lattice, an arbitrary constant &#x3c6;, and a reciprocal lattice vector G'&#x2191;=&#xb1;(k&#xb1;|k&#x2191;|(sin &#x3b8; cos &#x3c6;)/n, k&#xb1;|k&#x2191;|(sin &#x3b8; sin &#x3c6;)/n) expressed by using a spread angle &#x3b8; of a laser beam, the position vector r&#x2191; of the each lattice point, arbitrary constants d and &#x3c8;, and an integer L excluding 0.

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Kyoto, Japan

Masako Yone