JP2018098264A - 量子カスケード半導体レーザ - Google Patents
量子カスケード半導体レーザ Download PDFInfo
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- H—ELECTRICITY
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- H01S5/00—Semiconductor lasers
- H01S5/30—Structure or shape of the active region; Materials used for the active region
- H01S5/34—Structure or shape of the active region; Materials used for the active region comprising quantum well or superlattice structures, e.g. single quantum well [SQW] lasers, multiple quantum well [MQW] lasers or graded index separate confinement heterostructure [GRINSCH] lasers
- H01S5/3401—Structure or shape of the active region; Materials used for the active region comprising quantum well or superlattice structures, e.g. single quantum well [SQW] lasers, multiple quantum well [MQW] lasers or graded index separate confinement heterostructure [GRINSCH] lasers having no PN junction, e.g. unipolar lasers, intersubband lasers, quantum cascade lasers
- H01S5/3402—Structure or shape of the active region; Materials used for the active region comprising quantum well or superlattice structures, e.g. single quantum well [SQW] lasers, multiple quantum well [MQW] lasers or graded index separate confinement heterostructure [GRINSCH] lasers having no PN junction, e.g. unipolar lasers, intersubband lasers, quantum cascade lasers intersubband lasers, e.g. transitions within the conduction or valence bands
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- H01S5/00—Semiconductor lasers
- H01S5/10—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
- H01S5/12—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region the resonator having a periodic structure, e.g. in distributed feedback [DFB] lasers
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- H01S5/00—Semiconductor lasers
- H01S5/10—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
- H01S5/16—Window-type lasers, i.e. with a region of non-absorbing material between the active region and the reflecting surface
- H01S5/164—Window-type lasers, i.e. with a region of non-absorbing material between the active region and the reflecting surface with window regions comprising semiconductor material with a wider bandgap than the active layer
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- H01S5/00—Semiconductor lasers
- H01S5/20—Structure or shape of the semiconductor body to guide the optical wave ; Confining structures perpendicular to the optical axis, e.g. index or gain guiding, stripe geometry, broad area lasers, gain tailoring, transverse or lateral reflectors, special cladding structures, MQW barrier reflection layers
- H01S5/22—Structure or shape of the semiconductor body to guide the optical wave ; Confining structures perpendicular to the optical axis, e.g. index or gain guiding, stripe geometry, broad area lasers, gain tailoring, transverse or lateral reflectors, special cladding structures, MQW barrier reflection layers having a ridge or stripe structure
- H01S5/2205—Structure or shape of the semiconductor body to guide the optical wave ; Confining structures perpendicular to the optical axis, e.g. index or gain guiding, stripe geometry, broad area lasers, gain tailoring, transverse or lateral reflectors, special cladding structures, MQW barrier reflection layers having a ridge or stripe structure comprising special burying or current confinement layers
- H01S5/2222—Structure or shape of the semiconductor body to guide the optical wave ; Confining structures perpendicular to the optical axis, e.g. index or gain guiding, stripe geometry, broad area lasers, gain tailoring, transverse or lateral reflectors, special cladding structures, MQW barrier reflection layers having a ridge or stripe structure comprising special burying or current confinement layers having special electric properties
- H01S5/2226—Structure or shape of the semiconductor body to guide the optical wave ; Confining structures perpendicular to the optical axis, e.g. index or gain guiding, stripe geometry, broad area lasers, gain tailoring, transverse or lateral reflectors, special cladding structures, MQW barrier reflection layers having a ridge or stripe structure comprising special burying or current confinement layers having special electric properties semiconductors with a specific doping
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- H—ELECTRICITY
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- H01S5/00—Semiconductor lasers
- H01S5/20—Structure or shape of the semiconductor body to guide the optical wave ; Confining structures perpendicular to the optical axis, e.g. index or gain guiding, stripe geometry, broad area lasers, gain tailoring, transverse or lateral reflectors, special cladding structures, MQW barrier reflection layers
- H01S5/22—Structure or shape of the semiconductor body to guide the optical wave ; Confining structures perpendicular to the optical axis, e.g. index or gain guiding, stripe geometry, broad area lasers, gain tailoring, transverse or lateral reflectors, special cladding structures, MQW barrier reflection layers having a ridge or stripe structure
- H01S5/227—Buried mesa structure ; Striped active layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y20/00—Nanooptics, e.g. quantum optics or photonic crystals
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- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/0201—Separation of the wafer into individual elements, e.g. by dicing, cleaving, etching or directly during growth
- H01S5/0202—Cleaving
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- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/028—Coatings ; Treatment of the laser facets, e.g. etching, passivation layers or reflecting layers
- H01S5/0281—Coatings made of semiconductor materials
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- H—ELECTRICITY
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- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/20—Structure or shape of the semiconductor body to guide the optical wave ; Confining structures perpendicular to the optical axis, e.g. index or gain guiding, stripe geometry, broad area lasers, gain tailoring, transverse or lateral reflectors, special cladding structures, MQW barrier reflection layers
- H01S5/22—Structure or shape of the semiconductor body to guide the optical wave ; Confining structures perpendicular to the optical axis, e.g. index or gain guiding, stripe geometry, broad area lasers, gain tailoring, transverse or lateral reflectors, special cladding structures, MQW barrier reflection layers having a ridge or stripe structure
- H01S5/2205—Structure or shape of the semiconductor body to guide the optical wave ; Confining structures perpendicular to the optical axis, e.g. index or gain guiding, stripe geometry, broad area lasers, gain tailoring, transverse or lateral reflectors, special cladding structures, MQW barrier reflection layers having a ridge or stripe structure comprising special burying or current confinement layers
- H01S5/2222—Structure or shape of the semiconductor body to guide the optical wave ; Confining structures perpendicular to the optical axis, e.g. index or gain guiding, stripe geometry, broad area lasers, gain tailoring, transverse or lateral reflectors, special cladding structures, MQW barrier reflection layers having a ridge or stripe structure comprising special burying or current confinement layers having special electric properties
- H01S5/2224—Structure or shape of the semiconductor body to guide the optical wave ; Confining structures perpendicular to the optical axis, e.g. index or gain guiding, stripe geometry, broad area lasers, gain tailoring, transverse or lateral reflectors, special cladding structures, MQW barrier reflection layers having a ridge or stripe structure comprising special burying or current confinement layers having special electric properties semi-insulating semiconductors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/20—Structure or shape of the semiconductor body to guide the optical wave ; Confining structures perpendicular to the optical axis, e.g. index or gain guiding, stripe geometry, broad area lasers, gain tailoring, transverse or lateral reflectors, special cladding structures, MQW barrier reflection layers
- H01S5/22—Structure or shape of the semiconductor body to guide the optical wave ; Confining structures perpendicular to the optical axis, e.g. index or gain guiding, stripe geometry, broad area lasers, gain tailoring, transverse or lateral reflectors, special cladding structures, MQW barrier reflection layers having a ridge or stripe structure
- H01S5/227—Buried mesa structure ; Striped active layer
- H01S5/2275—Buried mesa structure ; Striped active layer mesa created by etching
Abstract
Description
実施例に係る量子カスケード半導体レーザの半導体メサは、例えばn型の下部クラッド層23b、コア層23a、回折格子層23c、n型の上部クラッド層23d、及びn型のコンタクト層23eを含む。半導体メサ19dは、フォトリソグラフィ及びエッチングを用いることによって、下部クラッド層23b、コア層23a、回折格子層23c、上部クラッド層23d、及びコンタクト層23eのためのIII−V族化合物半導体層を含む積層から作製される。この積層はn型半導体基板17上に設けられる。これらの半導体は、例えば有機金属気相成長法、分子線エピタキシー法によってn型半導体基板上に成長される。
Claims (8)
- 量子カスケード半導体レーザであって、
第1端面、第2端面、第1領域及び第2領域を含むレーザ構造体を備え、
前記レーザ構造体は、基板、半導体積層領域、及び第1埋込半導体領域を含み、前記半導体積層領域及び前記第1埋込半導体領域は、前記基板の主面上に設けられ、
前記第1領域及び前記第2領域は、前記第1端面から前記第2端面への第1軸の方向に配列され、前記第1領域及び前記第2領域は、前記半導体積層領域を含み、
前記第1領域の前記半導体積層領域は、前記第1軸の方向に延在する第1凹部を含み、前記第2領域の前記半導体積層領域は、前記第1軸の方向に延在する半導体メサを有し、前記半導体メサはコア層を含み、前記半導体メサは、前記第1軸に交差する第2軸の方向に延在する端面を有し、前記第1凹部及び前記半導体メサは整列されており、
前記第1埋込半導体領域は、前記半導体メサの前記端面を埋め込むように前記第1領域の前記第1凹部内に設けられる、量子カスケード半導体レーザ。 - 前記半導体積層領域は、前記第1軸の方向に延在する第1積層構造体及び第2積層構造体を有し、
前記第2領域において、前記半導体メサは、前記半導体積層領域の前記第1積層構造体と前記第2積層構造体との間に設けられ、前記第1領域において、前記第1凹部は、前記半導体積層領域の前記第1積層構造体及び前記第2積層構造体によって規定され、
前記レーザ構造体の前記第2領域は、第2埋込半導体領域を含み、
前記第2埋込半導体領域は、前記第2領域において、前記第1積層構造体と前記半導体メサとの間、及び前記第2積層構造体と前記半導体メサとの間に設けられる、請求項1に記載された量子カスケード半導体レーザ。 - 前記第1領域の前記半導体積層領域は、接続積層構造を含み、
前記第1積層構造体は前記接続積層構造に到達し、前記第2積層構造体は前記接続積層構造に到達する、請求項2に記載された量子カスケード半導体レーザ。 - 前記第1領域の前記半導体積層領域及び前記第1埋込半導体領域は、前記第1端面に到達する、請求項1又は請求項2に記載された量子カスケード半導体レーザ。
- 前記第1埋込半導体領域は、アンドープ半導体及び半絶縁性半導体の少なくともいずれかを含む、請求項1〜請求項4のいずれか一項に記載された量子カスケード半導体レーザ。
- 前記第1埋込半導体領域は、InP及びInGaAsPの少なくともいずれかを含む、請求項1〜請求項5のいずれか一項に記載された量子カスケード半導体レーザ。
- 前記レーザ構造体は、前記半導体メサの側面上に設けられ前記半導体メサを埋め込む電流ブロック領域を更に備え、
前記第1埋込半導体領域の材料は、構成元素及び組成の点で、前記電流ブロック領域の材料と実質的に同一である、請求項1〜請求項6のいずれか一項に記載された量子カスケード半導体レーザ。 - 前記基板は、前記半導体メサを搭載するリッジを有し、前記基板は、劈開性を有する半導体からなり、前記半導体積層領域は、劈開性を有する半導体からなり、前記第1埋込半導体領域は、劈開性を有する半導体からなる、請求項1〜請求項7のいずれか一項に記載された量子カスケード半導体レーザ。
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JP7028049B2 (ja) * | 2018-04-26 | 2022-03-02 | 住友電気工業株式会社 | 量子カスケードレーザ |
JP2021153125A (ja) * | 2020-03-24 | 2021-09-30 | 住友電気工業株式会社 | 量子カスケードレーザ |
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