JP2008251719A - 面発光レーザ素子および面発光レーザ素子の製造方法 - Google Patents
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- H—ELECTRICITY
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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
- H01S5/18—Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities
- H01S5/183—Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities having only vertical cavities, e.g. vertical cavity surface-emitting lasers [VCSEL]
- H01S5/18361—Structure of the reflectors, e.g. hybrid mirrors
- H01S5/18369—Structure of the reflectors, e.g. hybrid mirrors based on dielectric materials
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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
- H01S5/04—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
- H01S5/04257—Electrodes, e.g. characterised by the structure characterised by the configuration having positive and negative electrodes on the same side of the substrate
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- H—ELECTRICITY
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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
- H01S5/18—Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities
- H01S5/183—Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities having only vertical cavities, e.g. vertical cavity surface-emitting lasers [VCSEL]
- H01S5/18308—Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities having only vertical cavities, e.g. vertical cavity surface-emitting lasers [VCSEL] having a special structure for lateral current or light confinement
- H01S5/18311—Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities having only vertical cavities, e.g. vertical cavity surface-emitting lasers [VCSEL] having a special structure for lateral current or light confinement using selective oxidation
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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
- H01S5/18—Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities
- H01S5/183—Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities having only vertical cavities, e.g. vertical cavity surface-emitting lasers [VCSEL]
- H01S5/18341—Intra-cavity contacts
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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
- H01S5/343—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 in AIIIBV compounds, e.g. AlGaAs-laser, InP-based laser
- H01S5/34306—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 in AIIIBV compounds, e.g. AlGaAs-laser, InP-based laser emitting light at a wavelength longer than 1000nm, e.g. InP based 1300 and 1500nm lasers
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Abstract
【解決手段】面発光レーザ素子100は、基板1上に積層された活性層4と誘電体多層膜ミラーとしての上部DBRミラー7とを備え、上部DBRミラー7は、それを構成する誘電体多層膜内の少なくとも1つの界面に、面発光レーザ素子100が射出するレーザ光に対して上部DBRミラー7が所定反射率となる表面粗さを有する。
【選択図】 図1
Description
図1および図2は、本実施の形態にかかる面発光レーザ素子100の要部構成を示す図である。図1は平面図であり、図2は、図1中に示したII−II矢視断面を示す断面図である。これらの図に示すように、面発光レーザ素子100は、半絶縁性の基板1上に積層された下部DBRミラー2、n型クラッド層3、活性層4、電流狭窄層5、p型クラッド層6、上部DBRミラー7、p型電極8およびn型電極9を備える。このうち、n型クラッド層3上に積層された活性層4、電流狭窄層5およびp型クラッド層6は、エッチング処理等によって柱状形成されたメサポスト10として形成されている。
Rs=R0exp(−(4πσn/λ)2) ・・・(1)
2 下部DBRミラー
3 n型クラッド層
4 活性層
5 電流狭窄層
5a 開口部
5b 選択酸化層
6 p型クラッド層
7 上部DBRミラー
7a アパーチャ
8 p型電極
9 n型電極
10 メサポスト
11 p型引出電極
12 n型引出電極
100 面発光レーザ素子
Claims (7)
- 活性層が発した光を反射させる誘電体多層膜ミラーを備え、該誘電体多層膜ミラーが反射させた光をレーザ光として射出する面発光レーザ素子において、
前記誘電体多層膜ミラーは、該誘電体多層膜ミラー内の少なくとも1つの界面に、前記レーザ光に対して前記誘電体多層膜ミラーが所定反射率となる表面粗さを有したことを特徴とする面発光レーザ素子。 - 前記誘電体多層膜ミラーは、該誘電体多層膜ミラー内の各界面に、前記所定反射率と前記誘電体多層膜ミラー内の誘電体層数および光学定数とに基づいた略等しい表面粗さを有したことを特徴とする請求項1に記載の面発光レーザ素子。
- 前記所定反射率は、前記誘電体層数に対して略飽和状態の反射率であることを特徴とする請求項2に記載の面発光レーザ素子。
- 前記誘電体多層膜ミラー内の各界面が有する表面粗さは、二乗平均平方根粗さが0.5〜2.0nmであることを特徴とする請求項2または3に記載の面発光レーザ素子。
- 基板上に積層された活性層と誘電体多層膜ミラーとを備え、該誘電体多層膜ミラーが反射させたレーザ光を発する面発光レーザ素子の製造方法において、
前記誘電体多層膜ミラーを形成するとともに、該誘電体多層膜ミラー内の少なくとも1つの界面に、前記レーザ光に対して前記誘電体多層膜ミラーが所定反射率となる表面粗さを形成する多層膜形成工程を含むことを特徴とする面発光レーザ素子の製造方法。 - 前記多層膜形成工程は、前記誘電体多層膜ミラー内の各面に、前記所定反射率と前記誘電体多層膜ミラー内の誘電体層数および光学定数とに基づいた略等しい表面粗さを形成することを特徴とする請求項5に記載の面発光レーザ素子の製造方法。
- 前記所定反射率は、前記誘電体層数に対して略飽和状態の反射率であることを特徴とする請求項6に記載の面発光レーザ素子の製造方法。
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JP2007089420A JP5074800B2 (ja) | 2007-03-29 | 2007-03-29 | 面発光レーザ素子および面発光レーザ素子の製造方法 |
US12/057,538 US7801198B2 (en) | 2007-03-29 | 2008-03-28 | Surface emitting laser element and method of fabricating the same |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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KR20210157395A (ko) * | 2020-06-15 | 2021-12-28 | 취안저우 산안 세미컨덕터 테크놀러지 컴퍼니 리미티드 | 발광 다이오드 |
JP2022506900A (ja) * | 2018-11-13 | 2022-01-17 | レイセオン カンパニー | 超高反射器その他の光学デバイス上での前面コーティング操作によるコーティング応力の軽減 |
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JP2010251698A (ja) | 2009-03-27 | 2010-11-04 | Furukawa Electric Co Ltd:The | 面発光レーザ素子、面発光レーザアレイ素子、面発光レーザ装置、光源装置、および光モジュール |
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JP2022506900A (ja) * | 2018-11-13 | 2022-01-17 | レイセオン カンパニー | 超高反射器その他の光学デバイス上での前面コーティング操作によるコーティング応力の軽減 |
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US20080240192A1 (en) | 2008-10-02 |
US7801198B2 (en) | 2010-09-21 |
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