JP7296934B2 - 窒化物半導体レーザ素子及び照明光源モジュール - Google Patents
窒化物半導体レーザ素子及び照明光源モジュール Download PDFInfo
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Description
実施の形態1に係る窒化物半導体レーザ素子について図1A及び図1Bを用いて説明する。図1A及び図1Bは、本実施の形態に係る窒化物半導体レーザ素子100の構成を示す共振器方向に平行及び垂直な方向の模式的な断面図である。
実施の形態2に係る窒化物半導体レーザ素子について説明する。
実施の形態3に係る保護膜について説明する。本実施の形態では、第1保護膜の成膜においてArガスを用いずN2ガスのみを用いて作製した保護膜について説明する。
実施の形態4に係る保護膜について説明する。本実施の形態に係る保護膜では、耐久性をさらに向上させるため、実施の形態2に係る保護膜210及び220より、出射面第1保護膜211及び反射面第1保護膜221の膜厚を小さくした。以下、本実施の形態に係る保護膜について、実施の形態2に係る保護膜との相違点を中心に説明する。
実施の形態5に係る照明光源モジュールについて図14を用いて説明する。本実施の形態に係る照明光源モジュールは、窒化物半導体レーザ素子を備える照明光源モジュールである。図14は、本実施の形態に係る照明光源モジュール300の構成を示す概略断面図である。
以上、本開示に係る窒化物半導体レーザ素子について、各実施の形態に基づいて説明したが、本開示は、上記各実施の形態に限定されるものではない。
10f、10r 共振器端面
11、211、411、1011 出射面第1保護膜
11a,11b 非晶質SiN膜
12、212、412 出射面第2保護膜
13、213、413 出射面第3保護膜
15、215、415、1015 出射面反射率調整層
21、221、1021 反射面第1保護膜
22、222 反射面第2保護膜
23、223 反射面第3保護膜
25、225、1025 反射面反射率調整層
50 発光層
51 基板
52 n型クラッド層
53 n型ガイド層
54 量子井戸活性層
55 p側ガイド層
56 電子障壁層
57 p型クラッド層
58 p型コンタクト層
59 電流ブロック層
60 p側オーミック電極
61 p側電極
62 n側電極
70 導波路
100、200、200a、1000 窒化物半導体レーザ素子
110、120、210、220、410 保護膜
214、414 出射面第4保護膜
215A 膜膨張領域
300 照明光源モジュール
301 状態検出回路
302 波長変換素子
304 波長変換部材
304a 発光部
306 支持部材
310 半導体発光装置
314 パッケージ
316a、316b リードピン
318 透光部材
320 集光光学部材
320a レンズ
320b 反射光学素子
322、324 ネジ
330 トランジスタ
342 受光素子
350 基台
350t 第1面
352 保持部材
355 カバーユニット
360 実装基板
361 透光部材
366 外部接続部材
1111 AlN膜
1112 Al2O3膜
Claims (22)
- 発光層を含む複数の半導体層からなり、互いに対向する一対の共振器端面を有する積層構造体と、
前記一対の共振器端面の少なくとも一方に配置された誘電体からなる保護膜とを備え、
前記保護膜は、前記積層構造体側から順に配置された第1保護膜、第2保護膜及び第3保護膜を有し、
前記第1保護膜は、シリコンの窒化物又は酸窒化物を含む非晶質であり、
前記第2保護膜は、六方晶多結晶膜を含むアルミニウムの窒化膜又は酸窒化膜であり、
前記第3保護膜は非晶質である
窒化物半導体レーザ素子。 - 前記六方晶多結晶膜は、前記一対の共振器端面のうち、前記第2保護膜が配置された共振器端面の法線方向に対してc軸配向である
請求項1に記載の窒化物半導体レーザ素子。 - 前記アルミニウムの窒化膜又は酸窒化膜は、前記アルミニウムの窒化膜又は酸窒化膜中に混在する前記c軸配向と異なる配向の結晶を含む
請求項2に記載の窒化物半導体レーザ素子。 - 前記アルミニウムの窒化膜又は酸窒化膜は、前記アルミニウムの窒化膜又は酸窒化膜中に混在する非晶質を含む
請求項2に記載の窒化物半導体レーザ素子。 - 前記第1保護膜と前記第2保護膜との合計膜厚が50nm未満である
請求項1~4のいずれか1項に記載の窒化物半導体レーザ素子。 - 前記第1保護膜の膜厚は、1.0nm未満である
請求項1~5のいずれか1項に記載の窒化物半導体レーザ素子。 - 前記第3保護膜は、金属酸化物又は金属酸窒化物を含む非晶質膜である
請求項1~6のいずれか1項に記載の窒化物半導体レーザ素子。 - 前記第3保護膜は、アルミニウムの酸化物又は酸窒化物を含む非晶質膜である
請求項1~7のいずれか1項に記載の窒化物半導体レーザ素子。 - 前記第1保護膜及び前記第2保護膜の希ガス濃度は、1原子%未満であり、
前記第3保護膜の希ガス濃度は、1原子%以上3原子%未満である
請求項1~8のいずれか1項に記載の窒化物半導体レーザ素子。 - 前記第2保護膜は、酸素拡散抑制層である
請求項1~9のいずれか1項に記載の窒化物半導体レーザ素子。 - 前記第2保護膜の希ガス濃度は、第1保護膜の希ガス濃度より少ない
請求項1~10のいずれか1項に記載の窒化物半導体レーザ素子。 - 前記第1保護膜の希ガス濃度は、第3保護膜の希ガス濃度より少ない
請求項1~11のいずれか1項に記載の窒化物半導体レーザ素子。 - 前記第2保護膜の希ガス濃度は、第3保護膜の希ガス濃度より少ない
請求項1~12のいずれか1項に記載の窒化物半導体レーザ素子。 - 前記保護膜は、前記第3保護膜の上方に配置された少なくとも1層の誘電体膜からなる反射率調整層をさらに備える
請求項1~13のいずれか1項に記載の窒化物半導体レーザ素子。 - 前記保護膜は、前記第3保護膜と前記反射率調整層との間に配置された窒化物又は酸窒化物からなる第4保護膜をさらに備える
請求項14に記載の窒化物半導体レーザ素子。 - 前記第4保護膜は、アルミニウムの窒化物又は酸窒化物を含む六方晶の多結晶膜であり、
前記第4保護膜の結晶配向は、前記一対の共振器端面のうち、前記第4保護膜が配置された共振器端面の法線方向に対してc軸配向である
請求項15に記載の窒化物半導体レーザ素子。 - 前記第4保護膜の希ガス濃度は1原子%未満であり、かつ、前記第4保護膜の膜厚は50nm未満である
請求項15又は16に記載の窒化物半導体レーザ素子。 - 前記反射率調整層に含まれる前記少なくとも1層の誘電体膜のうち、前記第4保護膜に接する誘電体膜は、希ガス濃度が2原子%未満の非晶質酸化膜である
請求項15~17のいずれか1項に記載の窒化物半導体レーザ素子。 - 前記反射率調整層に含まれる前記少なくとも1層の誘電体膜の希ガス濃度は、3原子%未満である
請求項14~18のいずれか1項に記載の窒化物半導体レーザ素子。 - 前記保護膜の最表面が酸化物からなる
請求項1~19のいずれか1項に記載の窒化物半導体レーザ素子。 - 前記一対の共振器端面の少なくとも一方における反射率は、
前記窒化物半導体レーザ素子より出射されるレーザの波長に対する反射率スペクトルの極大値又は極小値である
請求項1~20のいずれか1項に記載の窒化物半導体レーザ素子。 - 請求項1~21のいずれか1項に記載の窒化物半導体レーザ素子を備える
照明光源モジュール。
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Application Number | Priority Date | Filing Date | Title |
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