JP5780605B2 - レーザ利用のためのgan基板を用いた光学素子構造 - Google Patents
レーザ利用のためのgan基板を用いた光学素子構造 Download PDFInfo
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- 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
- H01S5/2201—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 in a specific crystallographic orientation
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- H01S5/32025—Structure or shape of the active region; Materials used for the active region comprising PN junctions, e.g. hetero- or double- heterostructures grown on specifically orientated substrates, or using orientation dependent growth non-polar orientation
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- H01S5/00—Semiconductor lasers
- H01S5/30—Structure or shape of the active region; Materials used for the active region
- H01S5/32—Structure or shape of the active region; Materials used for the active region comprising PN junctions, e.g. hetero- or double- heterostructures
- H01S5/323—Structure or shape of the active region; Materials used for the active region comprising PN junctions, e.g. hetero- or double- heterostructures in AIIIBV compounds, e.g. AlGaAs-laser, InP-based laser
- H01S5/32308—Structure or shape of the active region; Materials used for the active region comprising PN junctions, e.g. hetero- or double- heterostructures in AIIIBV compounds, e.g. AlGaAs-laser, InP-based laser emitting light at a wavelength less than 900 nm
- H01S5/32341—Structure or shape of the active region; Materials used for the active region comprising PN junctions, e.g. hetero- or double- heterostructures in AIIIBV compounds, e.g. AlGaAs-laser, InP-based laser emitting light at a wavelength less than 900 nm blue laser based on GaN or GaP
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Description
前記領域は、(000−1)に向かって約−2度〜約2度の配向および(11−20)に 向かって約0.5度未満の配向により、特徴付けられる。前記結晶性表面は、ミスカット として特徴付けられ得、ゼロ度のカット方向を含まない。また、前記素子は、レーザ縞領域を有する。前記レーザ縞領域は、前記m面の無極性結晶性配向表面領域の一部を被覆した様態で形成される。好適な実施形態において、前記レーザ縞領域は、キャビティ配向により、特徴付けられる。前記キャビティ配向は、前記c方向に対して実質的に平行であり、前記レーザ縞領域は、第1の端部および第2の端部を有する。前記素子は、前記レーザ縞領域の前記第1の端部上に設けられた第1の劈開c面を含む。前記第1の劈開c面は好適には、レーザスクライブ領域を含む。また、前記素子は、前記レーザ縞領域の前記第2の端部上に設けられた第2の劈開c面を有する。特定の実施形態において、前記第2の劈開c面は、レーザスクライブ領域を含む点によっても特徴付けられる。
Claims (34)
- 光学素子であって、
m面の無極性結晶性表面領域を有するガリウムおよび窒素含有基板部材で、前記m面の無極性結晶性表面領域は、(000−1)に向かって、−2度乃至2度の配向および(11−20)に向かって0.5度未満の配向を有し、0度のカット方向を含まないガリウムおよび窒素含有基板部材と、
前記m面の無極性結晶表面領域の一部を被覆して形成されるレーザリッジ領域であって、前記レーザリッジ領域は、前記c方向に投射したキャビティ配向を有し、
第1の端部および第2の端部を有する、レーザリッジ領域と、前記レーザリッジ領域の前記第1の端部上に設けられた第1の劈開c面であり、前記c方向の投射に対して直交方向から+/−5度である第1の劈開c面、と、前記レーザリッジ領域の前記第2の端部上に設けられた第2の劈開c面であり、前記c方向の投射に対して直交方向から+/−5度である第2の劈開c面と、を含む光学素子。
- 前記第1の劈開c面は、前記第2の劈開c面に対して平行である、請求項1に記載の光学素子。
- 前記第1の劈開c面は、レーザスクライブ領域によって特徴付けられる第1の鏡表面を含む請求項1に記載の光学素子。
- 前記第1の鏡表面は、前記ガリウムおよび窒素含有基板部材の前側または後側のいずれかからのスクライブプロセスおよびブレイクプロセスによって得られる、請求項3に記載の光学素子。
- 前記第1の鏡表面は、反射特性を変更するためのコーティングを含む、請求項4に記載の光学素子。
- 前記コーティングは、二酸化ケイ素、ハフニア、チタニア、五酸化タンタルおよびアルミナから選択される、請求項5に記載の光学素子。
- 前記第1の劈開c面は、反射防止コーティングを含む、請求項4に記載の光学素子。
- 前記第2の劈開c面は、第2の鏡表面を含み、レーザスクライブ領域によって特徴付けられる、請求項1に記載の光学素子。
- 前記第2の鏡表面は、スクライブプロセスおよびブレイクプロセスによって得られる、請求項8に記載の光学素子。
- 前記第2の鏡表面は、反射特性を変更するためのコーティングを含む、請求項8に記載の光学素子。
- 前記コーティングは、二酸化ケイ素、ハフニア、チタニア、五酸化タンタルおよびアルミナから選択される、請求項10に記載の光学素子。
- 前記第2の劈開c面は、反射防止コーティングを含む、請求項8に記載の光学素子。
- 前記レーザリッジ領域の長さは、100ミクロン乃至2000ミクロンの範囲である、請求項1に記載の光学素子。
- 前記レーザリッジ領域の幅は、1ミクロン乃至15ミクロンの範囲である、請求項1に記載の光学素子。
- 前記c方向に対して垂直に偏光される自発出射光をさらに含む請求項1に記載の光学素子。
- 385乃至420ナノメートルの波長によって特徴付けられる自発出射光をさらに含む請求項1に記載の光学素子。
- 420乃至460ナノメートルの波長によって特徴付けられる自発出射光をさらに含む請求項1に記載の光学素子。
- 460乃至500ナノメートルの波長によって特徴付けられる自発出射光をさらに含む請求項1に記載の光学素子。
- 500乃至550ナノメートルの波長によって特徴付けられる自発出射光をさらに含む、請求項1に記載の光学素子。
- 前記レーザリッジは、ドライエッチングおよびウェットエッチングから選択されたエッチングプロセスによって得られることを特徴とする請求項1に記載の光学素子。
- 前記ガリウムおよび窒素含有基板部材の後側を被覆するn型金属領域と、前記レーザリッジ領域の上部を被覆するp型金属領域とを、さらに含む請求項1に記載の光学素子。
- 前記レーザリッジ領域は被覆型の誘電層を含み、前記被覆型の誘電層は、前記レーザリッジ領域の上部を露出させることを特徴とする請求項1に記載の光学素子。
- 前記表面領域を被覆するn型窒化ガリウム領域と、前記n型窒化ガリウム領域を被覆する活性領域と、前記活性領域を被覆する前記レーザリッジ領域とを、さらに含む請求項1に記載の光学素子。
- 前記活性領域は、1個乃至20個の量子井戸領域を含み、前記1個乃至20個の量子井戸領域は、井戸層および障壁層を含み、前記井戸層および障壁層の厚さはそれぞれ、1nm乃至40nmであることを特徴とする請求項23に記載の光学素子。
- 前記井戸層は、10オングストローム乃至50オングストロームの厚さであることを特徴とする請求項24に記載の光学素子。
- 電子ブロッキング領域を含み、前記電子ブロッキング領域は、前記活性領域を被覆する請求項23に記載の光学素子。
- 別個の閉じ込めヘテロ−構造を含み、前記別個の閉じ込めヘテロ-構造は、前記n型窒化ガリウム領域を被覆する請求項23に記載の光学素子。
- 光学素子の形成方法であって、
m面の無極性結晶性表面領域を有するガリウムおよび窒素含有基板部材を提供する工程で、前記領域は、(000−1)に向かって−2度乃至2度および(11−20)に向かって0.5度未満で、0度のカット方向を含まないオフカット配向により特徴付けられる基板部材を提供する工程と、
前記m面の無極性結晶性配向表面領域の一部を被覆するレーザリッジ領域を形成する工程であって、前記レーザリッジ領域は、前記c方向に投射したキャビティ配向を有し、第1の端部および第2の端部を有するレーザリッジ領域を形成する工程と、
一対の劈開面を形成する工程であって、前記レーザリッジ領域の前記第1の端部上に設けられ、前記c方向の投射に対して直交方向から+/−5度である第1の劈開c面と、前記レーザリッジ領域の前記第2の端部上に設けられ、前記c方向の投射に対して直交方向から+/−5度である第2の劈開c面を含む一対の劈開面を形成する工程と、を含む光学素子の形成方法。
- 前記一対の劈開面を形成する工程は、前記第1の劈開c面を形成する工程と、前記第2の劈開c面を形成する工程とを別個に含む、請求項28に記載の光学素子の形成方法。
- 前記第1の劈開c面および前記第2のc面をコーティングする工程をさらに含む、請求項28に記載の光学素子の形成方法。
- 前記一対の劈開c面を形成した後、単一化プロセスが行われることを特徴とする請求項28に記載の光学素子の形成方法。
- 光学素子であって、
m面の無極性結晶性表面領域を有するガリウムおよび窒素含有基板部材で、
前記m面の無極性結晶性表面領域は、(000−1)に向かって−2度乃至2度のオフカット配向および(11−20)に向かって0.5度未満のオフカット配向であり、
前記オフカット配向は、(000−1)に向かってゼロ度および(11−20)に向かってゼロ度を含まず、
前記m面の無極性結晶性表面領域は、第1の結晶品質を有するオフカット配向と、第2の結晶品質を有する非オフカット配向を特徴とし、
前記第1の結晶品質は、前記第2の結晶品質よりも高い、ガリウムおよび窒素含有基板部材と、
前記m面の無極性結晶性配向表面領域の一部を被覆して形成されたレーザリッジ領域であって、前記レーザリッジ領域は、前記c方向に投射したキャビティ配向であり、第1の端部および第2の端部を有する、レーザリッジ領域と、
前記レーザリッジ領域の前記第1の端部上に設けられ、前記c方向の投射に対して直交方向から+/−5度である第1の劈開c面と、前記レーザリッジ領域の前記第2の端部上に設けられ、前記c方向の投射に対して直交方向から+/−5度である第2の劈開c面と、を含む光学素子。
- 光学素子であって、
m面の結晶性表面領域を有するガリウムおよび窒素含有基板部材であって、前記m面の結晶性表面領域は、c面に向かって−17度乃至17度のオフカット配向を有し、0度のカット方向を含まないガリウムおよび窒素含有基板部材と、
前記m面の結晶性配向表面領域の一部を被覆して形成されたレーザリッジ領域であって、第1の端部および第2の端部を有するレーザリッジ領域と、
前記レーザリッジ領域の前記第1の端部上に設けられ、前記c方向の投射に対して直交方向から+/−5度である第1の劈開c面と、前記レーザリッジ領域の前記第2の端部上に設けられ、前記c方向の投射に対して直交方向から+/−5度である第2の劈開c面と、を含む光学素子。
- 前記オフカットによって構成される前記m面の結晶表面領域は、{20−21}面であることを特徴とする請求項33に記載の光学素子。
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| Application Number | Priority Date | Filing Date | Title |
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| US16892609P | 2009-04-13 | 2009-04-13 | |
| US61/168,926 | 2009-04-13 | ||
| US24350209P | 2009-09-17 | 2009-09-17 | |
| US61/243,502 | 2009-09-17 | ||
| PCT/US2010/030939 WO2010120819A1 (en) | 2009-04-13 | 2010-04-13 | Optical device structure using gan substrates for laser applications |
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| JP2012523718A JP2012523718A (ja) | 2012-10-04 |
| JP2012523718A5 JP2012523718A5 (ja) | 2013-06-27 |
| JP5780605B2 true JP5780605B2 (ja) | 2015-09-16 |
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-
2010
- 2010-04-13 JP JP2012506140A patent/JP5780605B2/ja not_active Expired - Fee Related
- 2010-04-13 US US12/759,273 patent/US9531164B2/en not_active Expired - Fee Related
- 2010-04-13 CN CN201080016546.6A patent/CN102396083B/zh active Active
- 2010-04-13 DE DE112010001615T patent/DE112010001615T5/de not_active Ceased
- 2010-04-13 WO PCT/US2010/030939 patent/WO2010120819A1/en not_active Ceased
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| Publication number | Publication date |
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| CN102396083B (zh) | 2015-12-16 |
| WO2010120819A1 (en) | 2010-10-21 |
| DE112010001615T5 (de) | 2012-08-02 |
| US9531164B2 (en) | 2016-12-27 |
| CN102396083A (zh) | 2012-03-28 |
| JP2012523718A (ja) | 2012-10-04 |
| US20100316075A1 (en) | 2010-12-16 |
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