JP2021519523A - 任意の偏光方向を有するテラヘルツ放射の生成及び検出 - Google Patents
任意の偏光方向を有するテラヘルツ放射の生成及び検出 Download PDFInfo
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Abstract
Description
−第1の間隙の「水平」(x方向に向けられた)区間と、
−第2の間隙の「垂直」(y方向に向けられた)区間だけがマスキングされないままであることが分かる。
Claims (14)
- テラヘルツ放射(TR)を生成又は検出する光導電スイッチであって、
−光導電基板(SUB)と、
−前記光導電基板の表面(SS)上の複数の電極と
を含み、
前記複数の電極が、
−第1の方向(x)に沿って伸長する少なくとも複数の第1の線形区間(GV)を含む第1の間隙により分離された第1の対の構造化電極(E10,EGR)、及び
−前記第1の方向とは異なる第2の方向(y)に沿って伸長する少なくとも複数の第2の線形区間(GH)を含む第2の間隙により分離された第2の対の構造化電極(E20,EGR)を含んでいること、及び
パターン化された非透過層(PML)であって基板伝導率を増大させるのに適したテラヘルツ放射及び可視又は赤外放射の少なくとも一方に対して非透過な層を更に含み、前記電極間の前記間隙部分を選択的にマスキングして、マスキングされずに残るのが、
−前記第1の対の電極間に第1の電圧を印加して前記可視又は赤外放射により照射すると前記第1の線形区間全体にわたり同方向且つ同じ向きに第1の電流が流れる前記第1の間隙の第1の線形区間と、
−前記第2の対の電極間に第2の電圧を印加して前記可視又は赤外放射により照射すると前記第2の線形区間全体にわたり同方向且つ同じ向きに第2の電流が流れる前記第2の間隙の第2の線形区間だけである
ことを特徴とする光導電スイッチ。 - 前記基板の少なくとも100μmの半径(R)を有する領域にわたる、前記第1の間隙の前記第1の線形区間の累積表面と、前記第2の間隙の前記第2の線形区間の累積表面が等しいか又は差異が30%以下であり、好適には10%以下である、請求項1に記載の光導電スイッチ。
- 前記第1の方向と前記第2の方向が互いに垂直である、請求項1〜2のいずれか1項に記載の光導電スイッチ。
- −前記第1及び第2の間隙が、前記光導電基板表面の少なくとも100μmの半径(R)を有する領域にわたり伸長し、
−前記第1の間隙の前記第1の線形区間の少なくとも大部分が、前記第2の間隙の対応する第2の線形区間から100μm未満離れた距離にある、請求項1〜3のいずれか1項に記載の光導電スイッチ。 - 前記第1及び第2の対の電極に配置されていて、基板伝導率を増大させるのに適したテラヘルツ放射及び可視又は赤外線の放射の両方に対して透過的な透過層(TL)、及び前記パターン化された非透過層(PML)を更に含む、請求項1〜4のいずれか1項に記載の光導電スイッチ。
- 前記第1の対(EV,EG)及び第2の対(EH,EG)の電極が咬合電極であり、各対の各電極が、同一対の他方の電極の方へ突出している複数のフィンガーを含み、前記第1の対の電極のフィンガーが前記第1の方向に沿って伸長する前記第1の間隙の前記第1の線形区間の複数により分離され、前記第2の対の電極のフィンガーが前記第2の方向に沿って伸長する前記第2の間隙の前記複数の第2の線形区間により分離されていて、前記パターン化された非透過層(PML)が、2個のうち1個の第1の間隙及び2個のうち1個の第2の間隙を交互にマスキングしている、請求項1〜5のいずれか1項に記載の光導電スイッチ。
- 前記第1の対(E10,EGR)及び前記第2の対(E20,EGR)の電極が複数の階段状の付属部を含み、各々の付属部が前記第1及び前記第2の方向に沿って伸長する交互の線形部分を含み、前記パターン化された非透過層が、前記第2の方向に沿って伸長する前記第1の間隙の線形区間及び前記第1の方向に沿って伸長する前記第2の間隙の線形区間をマスキングしている、請求項1〜5のいずれか1項に記載の光導電スイッチ。
- 前記第1及び第2の対の電極が共通の電極(EG,EGR)を共有する、請求項1〜7のいずれか1項に記載の光導電スイッチ。
- 制御された偏光方向を有するテラヘルツ放射(TR)を生成する装置であって、
−請求項1〜8のいずれか1項に記載の光導電スイッチと、
−前記第1の間隙に第1の電圧(VV)を印加すべく前記第1の対の電極に接続された第1の制御可能な電圧生成器(VVG)と、
−前記第2の間隙に第2の電圧(VH)を印加すべく前記第2の対の電極に接続された第2の独立に制御可能な電圧生成器(HVG)とを含む装置。 - 前記第1及び前記第2の電圧の値を前記テラヘルツ放射の目標偏光方向の関数として設定すべく前記第1及び第2の制御可能な電圧生成器を駆動すべく構成されたコントローラ(CTR)を更に含む、請求項9に記載の装置。
- 請求項9又は10に記述の装置を用いて制御された偏光方向を有するテラヘルツ放射を生成する方法であって、
−前記第1の制御可能な電圧生成器(VVG)を用いて前記第1の間隙(GV)に第1の電圧を印加し、前記第2の制御可能な電圧生成器(HVG)を用いて前記第2の間隙(GH)に第2の電圧を印加して、前記生成するテラヘルツ放射の目標偏光方向の関数として前記第1と第2の電圧の比率を決定するステップと、
−前記光導電基板表面の前記領域にパルス光(LP)を誘導するステップと
を含む方法。 - テラヘルツ放射を検出する装置であって、
−請求項1〜8のいずれか1項に記載の光導電スイッチと、
−前記電極を通って流れる第1の電流を検出すべく前記第1の対の電極に接続された第1の読み出し回路(RCV)と、
−前記電極を通って流れる第2の電流を検出すべく前記第2の対の電極に接続された第2の読み出し回路(RCH)と
を含む装置。 - 前記第1及び第2の読み出し回路から、前記第1及び第2の電流を表す信号を取得して、入射するテラヘルツ放射の偏光方向を前記信号から決定すべく構成されたプロセッサ(PR)を更に含む、請求項12に記載の装置。
- 請求項12又は13に記載の装置を用いてテラヘルツ放射を検出する方法であって、
−前記光導電基板表面の前記領域にパルス光(LP)を誘導するステップと、
−前記第1の読み出し回路を用いて前記第1の電流を検出し、前記第2の読み出し回路を用いて前記第2の電流を検出するステップと、
−入射するテラヘルツ(TR)放射の偏光方向を前記第1と第2の電流の比率から決定するステップと
を含む方法。
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JP2006317407A (ja) * | 2005-05-16 | 2006-11-24 | Tochigi Nikon Corp | テラヘルツ測定装置 |
EP2120291A1 (de) * | 2008-05-16 | 2009-11-18 | Forschungszentrum Dresden - Rossendorf e.V. | Skalierbare Terahertz-Antennen |
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2018
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JP2024023306A (ja) | 2024-02-21 |
WO2019185827A1 (en) | 2019-10-03 |
US20210018364A1 (en) | 2021-01-21 |
EP3546904A1 (en) | 2019-10-02 |
EP3775808A1 (en) | 2021-02-17 |
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