Abstract: A radiative cooling device that can cool a cooling target appropriately with cost reduction of its light reflective layer. An infrared radiative layer for radiating infrared light from a radiative surface and a light reflective layer located on the opposite side of the presence side of the radiative surface of the infrared radiative layer are provided in a mutually stacked manner. The light reflective layer is arranged such that a first layer made of silver or silver alloy and a second layer made of aluminum or aluminum alloy are stacked, with the first layer being disposed on the side close to the infrared radiative layer.

Abstract: The radiative cooling device includes an infrared radiative layer A that radiates infrared light IR from a radiative surface H, a light reflective layer B disposed on a side opposite to the radiative surface H with respect to the infrared radiative layer A, and a protective layer D disposed between the infrared radiative layer A and the light reflective layer B. The infrared radiative layer A is a resin material layer J having a thickness adjusted so as to emit a heat radiation energy greater than an absorbed solar energy in a wavelength range from 8 ?m to 14 ?m. The light reflective layer B contains silver or a silver alloy, and the protective layer D is formed from a polyolefin based resin with a thickness of 300 nm or more and 40 ?m or less or an ethylene terephthalate resin with a thickness of 17 ?m or more and 40 ?m or less.

Abstract: A radiative cooling device that is in a state in which a radiative surface is colored is provided. A radiative cooling device CP includes an infrared radiative layer A that radiates infrared light IR from a radiative surface H, a light reflective layer B that is disposed on the side opposite to the radiative surface H with respect to the infrared radiative layer A, and a color portion X.

Abstract: A radiative cooling device and a radiative cooling method that effectively suppress ultraviolet light absorption. The radiative cooling device includes an ultraviolet reflection layer that reflects ultraviolet light UV, a light reflection layer that reflects visible light and infrared light, and an infrared radiative layer that radiates infrared light IR. Infrared light IR is radiated form a radiative surface. The ultraviolet reflection layer, the infrared radiative layer and the light reflection layer are laminated in this order as viewed from the side of the radiative surface.

Abstract: Provided is a radiative cooling device that provides coloration of the radiative surface while maximally avoiding reduction in its radiative cooling performance due to absorption of solar light. An infrared radiative layer for radiating infrared light from a radiative surface and a light reflective layer disposed on the side opposite to the presence side of the radiative surface of the infrared radiative layer are provided in a mutually stacked state. The light reflective layer is arranged such that a first metal layer made of silver or silver alloy and having a thickness equal to or greater than 10 nm and equal to or less than 100 nm, a transparent dielectric layer and a second metal layer reflecting light transmitted through the first metal layer and the transparent dielectric layer are stacked in this order on the side closer to the infrared radiative layer.

Abstract: There is provided a technique that includes a quartz container in which an object to be processed, which contains a semiconductor, is arranged; a heater configured to emit heat; and a radiation control body arranged between the quartz container and the heater, wherein the radiation control body is configured to radiate a radiant wave of a wavelength transmittable through the quartz container by heating from the heater such that the radiant wave reaches the object to be processed in the quartz container.

Abstract: Provided is a radiative cooling device that provides coloration of the radiative surface while maximally avoiding reduction in its radiative cooling performance due to absorption of solar light. An infrared radiative layer for radiating infrared light from a radiative surface and a light reflective layer disposed on the side opposite to the presence side of the radiative surface of the infrared radiative layer are provided in a mutually stacked state. The light reflective layer is arranged such that a first metal layer made of silver or silver alloy and having a thickness equal to or greater than 10 nm and equal to or less than 100 nm, a transparent dielectric layer and a second metal layer reflecting light transmitted through the first metal layer and the transparent dielectric layer are stacked in this order on the side closer to the infrared radiative layer.

Abstract: A heat-radiating light source including a heat-radiating layer and a substrate laminated thereon for heating the heat-radiating layer is disclosed. A heat-radiating layer and a substrate for heating the heat-radiating layer are laminated. In the heat-radiating layer, there are provided a radiation control portion and a radiating transparent oxide layer, the radiation control portion having an MIM lamination portion including a pair of platinum layers juxtaposed along lamination direction and a resonating transparent oxide layer formed of a transparent oxide and disposed between the pair of platinum layers, the radiation control portion and the radiating transparent oxide layer are laminated with the radiation control portion and the radiating transparent oxide layer are disposed closer to the substrate in this order. The resonating transparent oxide layer R has a thickness providing a resonance wavelength equal to or smaller than 4 ?m.

Abstract: A thermal emission source is provided that has a structure capable of suppressing deterioration of an optical assembly over time. The thermal emission source includes an optical assembly (1) having an optical structure in which a member made of a semiconductor has a refractive index distribution so as to resonate with light of a wavelength shorter than a wavelength that corresponds to an absorption edge corresponding to a band gap of the semiconductor. The optical assembly (1) includes a coating structure (30) with a coating material that differs from the semiconductor of refractive portions (10) and through which light of a wavelength included in a wavelength range from visible light to far infrared rays can be transmitted.

Abstract: A radiative cooling device having high flexibility that can be retrofitted to an existing outdoor facility. An infrared radiative layer for radiating infrared light from a radiative surface and a light reflective layer disposed on the side opposite to the presence side of the radiative surface of the infrared radiative layer are provided. The infrared radiative layer is a resin material layer whose thickness is adjusted to discharge a greater thermal radiation energy than absorbed solar light energy in a wavelength band ranging from 8 ?m to 14 ?m.

Abstract: Provided is a radiative cooling device that provides coloration of the radiative surface while maximally avoiding reduction in its radiative cooling performance due to absorption of solar light. An infrared radiative layer for radiating infrared light from a radiative surface and a light reflective layer disposed on the side opposite to the presence side of the radiative surface of the infrared radiative layer are provided in a mutually stacked state. The light reflective layer is arranged such that a first metal layer made of silver or silver alloy and having a thickness equal to or greater than 10 nm and equal to or less than 100 nm, a transparent dielectric layer and a second metal layer reflecting light transmitted through the first metal layer and the transparent dielectric layer are stacked in this order on the side closer to the infrared radiative layer.

Abstract: A radiative cooling device that can cool a cooling target appropriately with cost reduction of its light reflective layer and that also can achieve the cooling effect for an extended period of time advantageously. An infrared radiative layer for radiating infrared light from a radiative surface and a light reflective layer disposed on the opposite side to the presence side of the radiative surface of the infrared radiative layer are provided in a mutually stacked state. The light reflective layer is arranged such that a first layer made of silver or silver alloy, a second layer made of aluminum or aluminum alloy and an anti-alloying transparent layer for preventing alloying between silver and aluminum are stacked in the order of the first layer, the anti-alloying transparent layer and the second layer on the side closer to the infrared radiative layer.

Abstract: A radiative cooling device that can cool a cooling target appropriately with cost reduction of its light reflective layer. An infrared radiative layer for radiating infrared light from a radiative surface and a light reflective layer located on the opposite side of the presence side of the radiative surface of the infrared radiative layer are provided in a mutually stacked manner. The light reflective layer is arranged such that a first layer made of silver or silver alloy and a second layer made of aluminum or aluminum alloy are stacked, with the first layer being disposed on the side close to the infrared radiative layer.

Abstract: A radiative cooling device and a radiative cooling method that effectively suppress ultraviolet light absorption. The radiative cooling device includes an ultraviolet reflection layer that reflects ultraviolet light UV, a light reflection layer that reflects visible light and infrared light, and an infrared radiative layer that radiates infrared light IR. Infrared light IR is radiated form a radiative surface. The ultraviolet reflection layer, the infrared radiative layer and the light reflection layer are laminated in this order as viewed from the side of the radiative surface.

Abstract: A thermal emission source is provided that has a structure capable of suppressing deterioration of an optical assembly over time. The thermal emission source includes an optical assembly (1) having an optical structure in which a member made of a semiconductor has a refractive index distribution so as to resonate with light of a wavelength shorter than a wavelength that corresponds to an absorption edge corresponding to a band gap of the semiconductor. The optical assembly (1) includes a coating structure (30) with a coating material that differs from the semiconductor of refractive portions (10) and through which light of a wavelength included in a wavelength range from visible light to far infrared rays can be transmitted.