Metamaterial optical member, light detection device, laser excitation light source, and measuring device
A metamaterial optical member 100 includes a light collecting optical member 1 having a light-entering surface IN 1 and a light-exiting surface OUT 1 and having a light collecting function and an antireflection film 2 disposed in the light-exiting surface OUT 1 of the light collecting optical member 1 . The antireflection film 2 has a first metamaterial structure in which a refractive index is gradually reduced in the light travelling direction. The metamaterial optical member 100 includes the antireflection film 2 having the metamaterial structure, thereby externally extracting light.
1. A light detection device comprising:
a metamaterial optical member comprising;
a light collecting optical member having
a light-entering surface and
a light-exiting surface and
wherein the light collecting optical member is configured to collect light that enters the light-entering surface; and
an antireflection film disposed in the light-exiting surface of the light collecting optical member,
wherein the antireflection film comprises a first metamaterial structure in which a refractive index is gradually reduced in the light travelling direction,
wherein the light-exiting surface includes a concave surface; and
a light detector disposed inside a concave surface of the metamaterial optical member.
2. The metamaterial optical member according to claim 1 , wherein the light-exiting surface includes a second concave surface continuous to a part of the concave surface and having a smaller opening size than the concave surface.
3. The metamaterial optical member according to claim 1 , wherein the light collecting optical member comprises a second metamaterial structure in which a refractive index gradually increases from the light-entering surface to the light-exiting surface.
4. A laser excitation light source comprising:
a metamaterial optical member comprising:
a light collecting optical member having
a light-entering surface and
a light-exiting surface and
wherein the light collecting optical member is configured to collect light that enters the light-entering surface; and
an antireflection film disposed in the light-exiting surface of the light collecting optical member,
wherein the antireflection film comprises a first metamaterial structure in which a refractive index is gradually reduced in the light travelling direction,
wherein the light-exiting surface includes a concave surface; and
a laser medium disposed inside a concave surface of the metamaterial optical member.
5. The metamaterial optical member according to claim 4 , wherein the light-exiting surface includes a second concave surface continuous to a part of the concave surface and having a smaller opening size than the concave surface.
6. The metamaterial optical member according to claim 4 , wherein the light collecting optical member comprises a second metamaterial structure in which a refractive index gradually increases from the light-entering surface to the light-exiting surface.
7. A measuring device comprising:
a metamaterial optical member comprising;
a light collecting optical member having
a light-entering surface and
a light-exiting surface and
wherein the light collecting optical member is configured to collect light that enters the light-entering surface; and
an antireflection film disposed in the light-exiting surface of the light collecting optical member,
wherein the antireflection film comprises a first metamaterial structure in which a refractive index is gradually reduced in the light travelling direction,
wherein the light-exiting surface includes a concave surface;
a medium flow path disposed inside a concave surface of the metamaterial optical member; and
a light detector configured to detect light from the medium flow path.
8. The metamaterial optical member according to claim 7 , wherein the light-exiting surface includes a second concave surface continuous to a part of the concave surface and having a smaller opening size than the concave surface.
9. The metamaterial optical member according to claim 7 , wherein the light collecting optical member comprises a second metamaterial structure in which a refractive index gradually increases from the light-entering surface to the light-exiting surface.