JP5916414B2 - 光半導体装置 - Google Patents
光半導体装置 Download PDFInfo
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- JP5916414B2 JP5916414B2 JP2012026749A JP2012026749A JP5916414B2 JP 5916414 B2 JP5916414 B2 JP 5916414B2 JP 2012026749 A JP2012026749 A JP 2012026749A JP 2012026749 A JP2012026749 A JP 2012026749A JP 5916414 B2 JP5916414 B2 JP 5916414B2
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- 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
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- 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
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Description
2 n型InPバッファ層(下部クラッド層)
3 n型InGaAlAs−SCH層
4 InGaAlAs−MQW層
5 p型InGaAlAs−SCH層
6 p型InAlAs電子ストップ層
7 エッチストップ層
8 p型InPクラッド層(上部クラッド層)
9 p型InP埋め込み層
10 InGaAsコンタクト層
11 SiO2絶縁膜
12 ポリイミド等の有機絶縁膜、或いは低応力無機絶縁膜
13 Ti/Pt/Auで構成されているp型電極
14 AuGe系をコンタクト電極n型電極
15 SiO2マスク
20 Fe−InP埋め込み層
21 SiO2保護膜
71 p型InP基板
72 p型InPバッファ層(下部クラッド層)
73 p型InAlAs電子ストップ層
74 p型InGaAlAs−SCH層
75 InGaAlAs−MQW層
76 n型InGaAlAs−SCH層
77 n型半導体多層膜
77a n型InGaAsP或いはInGaAlAsエッチストップ層
77b n型InPスペーサ層
77c n型InGaAsP回折格子層
78 n型InPクラッド層(上部クラッド層)
79 InP多層埋め込み層
79a n型InP埋め込み層
79b RuドープInP埋め込み層
79c p型InP埋め込み層
79d RuドープInP埋め込み層
80 InGaAsコンタクト層
81 SiO2絶縁膜
82 ポリイミド等の有機絶縁膜、或いは低応力無機絶縁膜
83 n型電極
84 p型電極
91 n型InPバッファ層
92 InGaAlAs 或いはInAlAsの多層膜
93 p型InPクラッド層
94 SiO2マスク
95 埋め込み層
99 n型SCH層
100 p型InGaAlAs層
101 n型InGaAsP層
102a RuドープInP埋め込み層
102b p型InP埋め込み層
102c RuドープInP埋め込み層
103 半導体多層膜
104 InGaAsPエッチストップ層兼回折格子層
105 パッシブ導波路
106 エッチストップ層
107 吸収型変調器
108 フローティング型InGaAsP回折格子層
109 電界吸収型変調器用p型電極
111 無反射コーティング膜
112 高反射コーティング膜
113 プロトンイオン注入領域
200 半導体レーザ装置
201 発振領域
202 レーザ光
Claims (8)
- InP半導体基板に形成された光半導体装置であって、
第1導電型でエアリッジ状の第1クラッド層と、
前記第1クラッド層の前記InP半導体基板側である下層側に配置され、前記第1クラッド層とは異なる組成を有する層を少なくとも1層含む第1導電型半導体層と、
前記第1導電型半導体層の前記下層側に配置され、Al元素を有する半導体層が複数重ねられた多層膜であり、量子井戸活性層を有するAl系半導体多層膜と、
前記Al系半導体多層膜の前記下層側に配置され、第2導電型からなる第2クラッド層と、
前記第1導電型半導体層及び前記Al系半導体多層膜が形成する2つの対向する共通の側壁に接する少なくとも1層以上の埋め込み半導体層と、を備え、
前記埋め込み半導体層の上層側の端面は、前記第1導電型半導体層の上層側端面と略同じ高さの面を有し、下層側は少なくとも前記Al系半導体多層膜を覆うように延びている、ことを特徴とする光半導体装置。 - 請求項1に記載の光半導体装置であって、
前記側壁に挟まれた前記第1導電型半導体層及び前記Al系半導体多層膜が形成する形状の中心軸は、前記第1クラッド層の形状の中心軸となっている、ことを特徴とする光半導体装置。 - 請求項1又は2に記載の光半導体装置であって、
前記埋め込み層の下層側に形成され、前記共通の側壁とは離間して形成される、少なくとも1層以上の下層側埋め込み層と、を更に備える、ことを特徴とする光半導体装置。 - 請求項1〜3のいずれか一項に記載の光半導体装置であって、
前記Al系半導体多層膜は、n型のInGaAsP層からなるSCH層を有している、
ことを特徴とする光半導体装置。 - 請求項1〜4のいずれか一項に記載の光半導体装置であって、
前記埋め込み層がp型半導体である、或いはドーパントとしてRuがドーピングされている、ことを特徴とする光半導体装置。 - 請求項1〜5のいずれか一項に記載の光半導体装置であって、
前記第1導電型半導体層は、InGaAsP又はInGaAlAsを含んでいる、ことを特徴とした光半導体装置。 - 請求項1〜6のいずれか一項に記載の光半導体装置であって、
前記埋め込み半導体層の上層側及び前記第1クラッド層の側面に設けられた酸化膜と、
前記酸化膜の上層側で前記第1クラッド層の側面を覆うように設けられた有機絶縁膜又は低応力無機絶縁膜と、を更に備える、ことを特徴とする光半導体装置。 - 請求項1〜7のいずれか一項に記載の光半導体装置であって、
前記共通の側壁間の距離により定められる前記第1導電型半導体層の幅、前記Al系半導体多層膜の幅、及び前記第1クラッド層の幅は略同じである、ことを特徴とする光半導体装置。
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