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HEAT-RADIATING LIGHT SOURCE UPDATE

外国特許コード F180009629
整理番号 5334
掲載日 2018年11月20日
出願国 世界知的所有権機関(WIPO)
国際出願番号 2017JP005160
国際公開番号 WO 2017150160
国際出願日 平成29年2月13日(2017.2.13)
国際公開日 平成29年9月8日(2017.9.8)
優先権データ
  • 特願2016-037217 (2016.2.29) JP
発明の名称 (英語) HEAT-RADIATING LIGHT SOURCE UPDATE
発明の概要(英語) A heat-radiating light source 10 is equipped with: a laminate (10S) obtained by laminating m (where m is an integer of 2 or more) quantum well structure layers (111, 112), and having provided thereto n-layers (121, 122) comprising an n-type semiconductor and a p-layer (13) comprising a p-type semiconductor, so as to sandwich each quantum well structure layer from both sides in the laminating direction; voltage applying means (151, 152) that apply a voltage that transfers a charge to the n-layers or the p-layer within the quantum well of the quantum well structure layers, and that is directly or indirectly connected to the n-layers and p-layer that sandwich the m quantum well structure layers; voltage switching means (161, 162, 17) that switch the application of voltage to each of the m quantum well structure layers on and off; and a photonic crystal part (20) in which light having m types of wavelengths, which correspond to transition energy between sub-bands in the quantum wells, resonate, said m types of wavelengths being generated one type at a time from each of the m quantum well structure layers, and which is provided within the laminate or adjacent to said laminate. The heat-radiating light source 10 is capable of generating a plurality of wavelengths by switching therebetween one wavelength at a time at high speed.
従来技術、競合技術の概要(英語) BACKGROUND ART
The light source is thermal radiation, not only provides heat to the object light can be obtained, has an advantage. The light source is thermal radiation, for example using infrared rays can be used as a light source of the various sensors, in particular, to analyze the components in the engine exhaust gas sensor, the sensing area of the waste heat of the engine is converted to the infrared can be used suitably as a light source.
The electromagnetic waves emitted by the object is heat is supplied, the temperature-dependent wavelength range having a spectrum spreading. °C hundreds of several tens of °C - for example the object can be obtained by heating the wavelength of the electromagnetic waves and the range of several tens µm µm -, the temperature thereof increases, the range is spread in the short wavelength side. However, the infrared sensor of the above-specified generally 1 or more wavelengths of the order to use only the infrared, such thermal radiation light source is used, unnecessary infrared rays other than the specific wavelength is irradiated so that the object to be measured, such as that the heating the object to be measured may be an adverse effect. In addition, is input to the electrical energy generated in the case where the thermal radiation, the broadband radiation is generated with the light source becomes a problem in that an increase in power consumption.
To solve this problem, in Patent Document 1, within the photonic crystal in the quantum well structure is formed of a thermal radiation light source is proposed. The photonic crystal is a, a periodic refractive index distribution of the compound, which corresponds to the standing wave with a specific wavelength is adapted to be formed. The photonic crystals, mainly due to the plate member in Patent Document 1 have different refractive indexes and the substrate refractive index area is an area (typically air holes) are periodically provided to be used, a columnar shape (in air) on the base member (modified refractive index member) by the arrangement of, on the base portion of the (air and the modified refractive index member) may be used as a photonic crystal. And the quantum well structure, multiple different types of the magnitude of the energy band gap, on the order of several tens of nm thickness of several nm - by laminating a semiconductor layer (quantum well) of the energy potential well formed as the structure of.
The heat radiation light source, heat from the heat source is supplied, the quantum wells of the quantum well structure is formed in a number of discrete energy level (subband) transition between (intersubband transition) occurs, the center wavelength corresponding to the energy transition in a finite bandwidth of light emission is generated. Then, the quantum well structure is provided in the photonic crystal, the period of the photonic crystal 1 is determined by the resonance with two wavelengths so as to be amplified, one wavelength in the 1 light having a wavelength spectrum having a sharp peak is generated.
The heat radiation light source and may further include, for applying a voltage to quantum well structures of the electrode is provided. By ON/OFF of this applied voltage, the quantum well to change the number of electrons or holes, whereby the intensity of light on the above-described specific wavelength can be controlled.
  • 出願人(英語)
  • ※2012年7月以前掲載分については米国以外のすべての指定国
  • KYOTO UNIVERSITY
  • 発明者(英語)
  • NODA, Susumu
  • INOUE, Takuya
  • JI, Anqi
  • ASANO, Takashi
国際特許分類(IPC)
指定国 National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DJ DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS JP KE KG KH KN KP KR KW KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG
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