JP7371552B2 - 量子カスケードレーザ - Google Patents
量子カスケードレーザ Download PDFInfo
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- JP7371552B2 JP7371552B2 JP2020053053A JP2020053053A JP7371552B2 JP 7371552 B2 JP7371552 B2 JP 7371552B2 JP 2020053053 A JP2020053053 A JP 2020053053A JP 2020053053 A JP2020053053 A JP 2020053053A JP 7371552 B2 JP7371552 B2 JP 7371552B2
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- 239000010410 layer Substances 0.000 claims description 294
- 238000005253 cladding Methods 0.000 claims description 103
- 239000012792 core layer Substances 0.000 claims description 33
- 239000000758 substrate Substances 0.000 claims description 32
- 239000004065 semiconductor Substances 0.000 description 39
- 230000000903 blocking effect Effects 0.000 description 20
- 238000004519 manufacturing process Methods 0.000 description 9
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- 238000005530 etching Methods 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 6
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- 229910000530 Gallium indium arsenide Inorganic materials 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
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- 238000000206 photolithography Methods 0.000 description 3
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- 229910004541 SiN Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
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- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- UMIVXZPTRXBADB-UHFFFAOYSA-N benzocyclobutene Chemical compound C1=CC=C2CCC2=C1 UMIVXZPTRXBADB-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 238000003891 environmental analysis Methods 0.000 description 1
- 238000004868 gas analysis Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002488 metal-organic chemical vapour deposition Methods 0.000 description 1
- 238000001451 molecular beam epitaxy Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
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- 238000001020 plasma etching Methods 0.000 description 1
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- 229920001721 polyimide Polymers 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 238000000927 vapour-phase epitaxy Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 238000001039 wet etching Methods 0.000 description 1
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- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/026—Monolithically integrated components, e.g. waveguides, monitoring photo-detectors, drivers
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- H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
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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
- H01S5/04—Processes or apparatus for excitation, e.g. pumping, e.g. by electron beams
- H01S5/042—Electrical excitation ; Circuits therefor
- H01S5/0425—Electrodes, e.g. characterised by the structure
- H01S5/04254—Electrodes, e.g. characterised by the structure characterised by the shape
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- H01S5/04—Processes or apparatus for excitation, e.g. pumping, e.g. by electron beams
- H01S5/042—Electrical excitation ; Circuits therefor
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- H01S5/00—Semiconductor lasers
- H01S5/04—Processes or apparatus for excitation, e.g. pumping, e.g. by electron beams
- H01S5/042—Electrical excitation ; Circuits therefor
- H01S5/0425—Electrodes, e.g. characterised by the structure
- H01S5/04256—Electrodes, e.g. characterised by the structure characterised by the configuration
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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
- H01S5/2004—Confining in the direction perpendicular to the layer structure
- H01S5/2018—Optical confinement, e.g. absorbing-, reflecting- or waveguide-layers
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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
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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
- H01S5/2275—Buried mesa structure ; Striped active layer mesa created by etching
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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
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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
- H01S5/2224—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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- H01S5/00—Semiconductor lasers
- H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
- H01S5/4025—Array arrangements, e.g. constituted by discrete laser diodes or laser bar
- H01S5/4087—Array arrangements, e.g. constituted by discrete laser diodes or laser bar emitting more than one wavelength
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- Condensed Matter Physics & Semiconductors (AREA)
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- Optics & Photonics (AREA)
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- Semiconductor Lasers (AREA)
Description
一実施形態に係る量子カスケードレーザは、基板上に設けられ、第1コア層を含む第1メサ導波路と、前記基板上に設けられ、第2コア層を含む第2メサ導波路と、前記第1メサ導波路に電気的に接続された第1電極と、前記第2メサ導波路に電気的に接続された第2電極と、を備え、前記第1メサ導波路及び前記第2メサ導波路は、第1方向に延在し、前記第1方向に交差する第2方向において互いに離間しており、前記第1電極と前記第2電極との間の距離は、前記第1メサ導波路と前記第2メサ導波路との間の距離よりも大きい。
以下、添付図面を参照しながら本開示の実施形態が詳細に説明される。図面の説明において、同一又は同等の要素には同一符号が用いられ、重複する説明は省略される。図面には、必要に応じて、互いに交差するX軸方向(第1方向)、Y軸方向(第2方向)及びZ軸方向が示される。X軸方向、Y軸方向及びZ軸方向は例えば互いに直交している。
10a…量子カスケードレーザ
10b…量子カスケードレーザ
10c…量子カスケードレーザ
10d…量子カスケードレーザ
10e…量子カスケードレーザ
20…基板
20s…主面
21a…凸部
21b…凸部
22…半導体層
22a…下部クラッド層
22b…下部クラッド層
24…半導体層
24a…コア層
24b…コア層
26…半導体層
26a…回折格子層
26b…回折格子層
28…半導体層
28a…上部クラッド層
28b…上部クラッド層
30a…コンタクト層
30b…コンタクト層
40…電流ブロック領域
50…絶縁層
110…出射面
112…反射面
114…側面
116…側面
128a…上部クラッド層(第1クラッド層)
128b…上部クラッド層(第2クラッド層)
130…半導体層
130a…コンタクト層(第1コンタクト層)
130b…コンタクト層(第2コンタクト層)
228a…上部クラッド層(第1クラッド層)
228b…上部クラッド層(第2クラッド層)
230a…コンタクト層(第1コンタクト層)
230b…コンタクト層(第2コンタクト層)
E…金属膜
E1…第1電極
E1a…第1電極
E1b…第1電極
E2…第2電極
E2a…第2電極
E2b…第2電極
E3…第3電極
M1…第1メサ導波路
M1t…頂面
M2…第2メサ導波路
M2t…頂面
MK1…マスク
MK2…マスク
MK3…マスク
Ms1…第1側面
Ms2…第2側面
Ms3…第3側面
Ms4…第4側面
R…レジストパターン
W1…距離
W2…幅
W3…距離
W4…距離
Λ…ピッチ
Claims (3)
- 基板上に設けられ、第1コア層を含む第1メサ導波路と、
前記基板上に設けられ、第2コア層を含む第2メサ導波路と、
前記第1メサ導波路に電気的に接続された第1電極と、
前記第2メサ導波路に電気的に接続された第2電極と、
前記第1メサ導波路の頂面及び前記第1電極に電気的に接続された第1コンタクト層と、
前記第2メサ導波路の頂面及び前記第2電極に電気的に接続された第2コンタクト層と、
を備え、
前記第1コンタクト層は、前記第1メサ導波路の前記頂面上に設けられ、
前記第1電極は、前記第1コンタクト層上に設けられ、
前記第2コンタクト層は、前記第2メサ導波路の前記頂面上に設けられ、
前記第2電極は、前記第2コンタクト層上に設けられ、
前記第1コア層及び前記第2コア層のそれぞれは、発光層であり、
前記第1メサ導波路及び前記第2メサ導波路は、第1方向に延在し、前記第1方向に交差する第2方向において互いに離間しており、
前記第1メサ導波路は、第1側面及び第2側面を有しており、
前記第2メサ導波路は、第3側面及び第4側面を有しており、
前記第1側面、前記第2側面、前記第3側面及び前記第4側面は、前記第1方向に延在しており、
前記第2側面は、前記第3側面に対向しており、
前記第1コンタクト層は、前記第2方向において前記第1側面に対して前記第2側面とは反対側の位置まで延在しており、
前記第2コンタクト層は、前記第2方向において前記第4側面に対して前記第3側面とは反対側の位置まで延在しており、
前記第1電極の端面と前記第1電極の前記端面に対向する前記第2電極の端面との間の距離は、前記第1側面と前記第4側面との間の距離よりも大きい、量子カスケードレーザ。 - 前記第1メサ導波路の前記頂面と前記第1コンタクト層との間に配置された第1クラッド層と、
前記第2メサ導波路の前記頂面と前記第2コンタクト層との間に配置された第2クラッド層と、
を更に備え、
前記第1クラッド層は、前記第2方向において前記第1側面に対して前記第2側面とは反対側の位置まで延在しており、
前記第2クラッド層は、前記第2方向において前記第4側面に対して前記第3側面とは反対側の位置まで延在している、請求項1に記載の量子カスケードレーザ。 - 前記第1電極と前記第2電極との間に配置された絶縁層を更に備える、請求項1または請求項2に記載の量子カスケードレーザ。
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JP2020053053A JP7371552B2 (ja) | 2020-03-24 | 2020-03-24 | 量子カスケードレーザ |
US17/173,597 US20210305769A1 (en) | 2020-03-24 | 2021-02-11 | Quantum cascade laser |
CN202110296066.XA CN113451887A (zh) | 2020-03-24 | 2021-03-19 | 量子级联激光器 |
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JP2013254908A (ja) | 2012-06-08 | 2013-12-19 | Sumitomo Electric Ind Ltd | 量子カスケード半導体レーザ |
US20140198816A1 (en) | 2013-01-11 | 2014-07-17 | Near Margalit | Isolated Modulator Electrodes for Low Power Consumption |
JP2014170825A (ja) | 2013-03-04 | 2014-09-18 | Sumitomo Electric Ind Ltd | 量子カスケード半導体レーザ |
JP2015536576A (ja) | 2012-11-30 | 2015-12-21 | ソーラボ クアンタム エレクトロニクス インコーポレイテッドThorlabs Quantum Electronics, Inc. | 異なる活性および不活性コアの成長による多波長量子カスケードレーザ |
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JP2017130605A (ja) | 2016-01-22 | 2017-07-27 | 日本電信電話株式会社 | 半導体光デバイス |
JP2018152370A (ja) | 2017-03-09 | 2018-09-27 | 住友電気工業株式会社 | 半導体レーザ |
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JPS6490583A (en) * | 1987-10-01 | 1989-04-07 | Sumitomo Electric Industries | Semiconductor laser element |
JPH077221A (ja) * | 1993-06-18 | 1995-01-10 | Furukawa Electric Co Ltd:The | 半導体レーザ素子 |
KR100272155B1 (ko) * | 1996-07-26 | 2000-12-01 | 니시무로 타이죠 | 질화갈륨계화합물반도체레이저및그제조방법 |
JP3447920B2 (ja) * | 1996-07-26 | 2003-09-16 | 株式会社東芝 | 窒化ガリウム系化合物半導体レーザ及びその製造方法 |
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JP2000269601A (ja) | 1999-03-18 | 2000-09-29 | Sony Corp | 半導体発光装置とその製造方法 |
JP2006287057A (ja) | 2005-04-01 | 2006-10-19 | Matsushita Electric Ind Co Ltd | 半導体レーザ装置及びその製造方法 |
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JP2013254908A (ja) | 2012-06-08 | 2013-12-19 | Sumitomo Electric Ind Ltd | 量子カスケード半導体レーザ |
JP2015536576A (ja) | 2012-11-30 | 2015-12-21 | ソーラボ クアンタム エレクトロニクス インコーポレイテッドThorlabs Quantum Electronics, Inc. | 異なる活性および不活性コアの成長による多波長量子カスケードレーザ |
US20140198816A1 (en) | 2013-01-11 | 2014-07-17 | Near Margalit | Isolated Modulator Electrodes for Low Power Consumption |
JP2014170825A (ja) | 2013-03-04 | 2014-09-18 | Sumitomo Electric Ind Ltd | 量子カスケード半導体レーザ |
JP2017037870A (ja) | 2015-08-06 | 2017-02-16 | 住友電気工業株式会社 | 量子カスケードレーザデバイス |
JP2017092382A (ja) | 2015-11-16 | 2017-05-25 | 住友電気工業株式会社 | 量子カスケードレーザデバイス |
JP2017130605A (ja) | 2016-01-22 | 2017-07-27 | 日本電信電話株式会社 | 半導体光デバイス |
JP2018152370A (ja) | 2017-03-09 | 2018-09-27 | 住友電気工業株式会社 | 半導体レーザ |
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