Abstract: A laser device includes a substrate, a first waveguiding layer, an active layer, a second waveguiding layer, a contact layer, an insulating layer, a first electrode, and a second electrode. The first waveguiding layer, the active layer, the second waveguiding layer, and the contact layer form an epitaxy structure having a first platform and a second platform. The first platform has a photonic crystal structure. The insulating layer is disposed on an upper surface and a sidewall surface of the first platform, and on an upper surface of the second platform. The sidewall surface passes through the contact layer, the second waveguiding layer, the active layer, and at least a portion of the first waveguiding layer. The first electrode is on the insulating layer and the second electrode is connected to the outer surface of the substrate and arranged to form an opening for laser output.

Abstract: A laser device includes a substrate, a first waveguiding layer, an active layer, a second waveguiding layer, a contact layer, an insulating layer, a light-transmissive conducting layer, a first electrode, and a second electrode. The first waveguiding layer, the active layer, the second waveguiding layer, and the contact layer form an epitaxy structure having a first platform and a second platform. The first platform has multiple holes to form a photonic crystal structure. The insulating layer is over an upper surface and a sidewall surface of the first platform, and over an upper surface of the second platform. The sidewall surface passes through the contact layer, the second waveguiding layer, and the active layer. The light-transmissive conducting layer connects to the photonic crystal structure through an aperture of the insulating layer. The first electrode has an opening corresponding to the aperture. The second electrode is under the substrate.

Abstract: An optical system is provided and includes a fixed assembly, a movable element and a driving module. The fixed assembly has a main axis. The movable element is movable relative to the fixed assembly and coupled to a first optical element. The driving module is configured to drive the movable element to move relative to the fixed assembly. The driving module includes a first driving assembly and a second driving assembly, and the first driving assembly and the second driving assembly are individually operable.

Abstract: A laser device includes a first waveguiding layer, an active layer, a second waveguiding layer, a contact layer, a first insulating layer, a plurality of hole fillings, a first electrode, and a second electrode. The first waveguiding layer, the active layer, the second waveguiding layer, and the contact layer are stacked in sequence to form an epitaxy structure. The epitaxy structure has a first platform, the first platform has multiple holes to form a photonic crystal structure. The first insulating layer is over an upper surface and a sidewall surface of the first platform, wherein the first insulating layer has a first aperture corresponding to the photonic crystal structure. The hole fillings are respectively filled in the holes. The first electrode is over the photonic crystal structure. The second electrode is electrically connected to the first waveguiding layer.

Abstract: An electrically pumped photonic-crystal surface-emitting laser, the epitaxy structure has a first mesa, the first mesa has multiple air holes and forming a photonic crystal structure, the epitaxy structure further has a second mesa, the second mesa and photonic crystal structure is facing the same direction; a first metal electrode arranged on the insulating layer, and covering the photonic crystal structure; a second metal electrode arranged on the second mesa and protruding out of the groove, making the first metal electrode and the second metal electrode face the same direction; and further make the first metal electrode connect to the first connecting metal and make the second metal electrode connect to the second connecting metal for making the photonic crystal structure become flip chip.

Abstract: A laser device includes a substrate, a first waveguiding layer, an active layer, a second waveguiding layer, a contact layer, an insulating layer, a light-transmissive conducting layer, a first electrode, and a second electrode. The first waveguiding layer, the active layer, the second waveguiding layer, and the contact layer form an epitaxy structure having a first platform and a second platform. The first platform has multiple holes to form a photonic crystal structure. The insulating layer is over an upper surface and a sidewall surface of the first platform, and over an upper surface of the second platform. The sidewall surface passes through the contact layer, the second waveguiding layer, and the active layer. The light-transmissive conducting layer connects to the photonic crystal structure through an aperture of the insulating layer. The first electrode has an opening corresponding to the aperture. The second electrode is under the substrate.