Nippon Telegraph and Telephone Corporation

Eiichi Kuramochi

Masaya Notomi

Akihiko Shinya

Shota Kita

Kenta Takata

Hideaki Taniyama

Masaaki Ono

Kengo Nozaki

Masato Takiguchi

Hisashi Sumikura

Each of six first lattice elements adjacent to a light confinement portion shifts from a lattice point in a direction of separating from the light confinement portion, and each of twelve second lattice elements shifts from a lattice point in a direction of separating from the light confinement portion. The second lattice elements are lattice elements arranged to be adjacent to the first lattice elements on a side of separating from the light confinement portion. Moreover, each of the first lattice elements has a smaller diameter than other lattice elements arranged on lattice points.

Photonic crystal optical resonator and method for fabricating same

First lattice elements shift away from a light confinement portion in a second direction. Second lattice elements shift away from the light confinement portion in the second direction. Third lattice elements shift away from the light confinement portion in the second direction. A shift amount of the first lattice elements is 0.05 to 0.5 times as large as a crystal period. A shift amount of the second lattice elements is 0.02 to 0.5 times as large as the crystal period. A shift amount of the third lattice elements is 0.01 to 0.5 times as large as the crystal period.

Photonic crystal optical resonator

The amount of outward shift of a lattice element () and a lattice element (), the outward shift being symmetrical with respect to a resonator center on a straight line, is 0.42 to 0.5 times a lattice constant of a photonic crystal. The amount of outward shift of a lattice element () and a lattice element (), the outward shift being symmetrical with respect to the resonator center on the straight line, is 0.26 to 0.38 times the lattice constant of the photonic crystal. The amount of outward shift of a lattice element () and a lattice element (), the outward shift being symmetrical with respect to the resonator center on the straight line, is 0.13 to 0.19 times the lattice constant of the photonic crystal. The amount of outward shift of a lattice element () and a lattice element (), the outward shift being symmetrical with respect to the resonator center on the straight line, is &#x2212;0.1 to 0 times the lattice constant of the photonic crystal.

Photonic crystal optical element having an active medium in a light confinement portion

An active medium piece (), which has been taken out using a nanoprobe (), is processed so as to match the shape of a nanoslot (), and thus an active medium small piece () that is smaller than the active medium piece () is formed (a fourth step). For example, irradiation with an ion beam () is performed so that the active medium piece () is shaped (processed) into an active medium small piece () that has a three-dimensional shape suitable for being placed in the nanoslot (). The active medium piece () is processed into the active medium small piece () in the state of being held by the nanoprobe ().

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Tokyo, Japan

Eiichi Kuramochi