WO2014208186A1 - 受光素子及びその製造方法 - Google Patents
受光素子及びその製造方法 Download PDFInfo
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- WO2014208186A1 WO2014208186A1 PCT/JP2014/061383 JP2014061383W WO2014208186A1 WO 2014208186 A1 WO2014208186 A1 WO 2014208186A1 JP 2014061383 W JP2014061383 W JP 2014061383W WO 2014208186 A1 WO2014208186 A1 WO 2014208186A1
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- light
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F30/00—Individual radiation-sensitive semiconductor devices in which radiation controls the flow of current through the devices, e.g. photodetectors
- H10F30/20—Individual radiation-sensitive semiconductor devices in which radiation controls the flow of current through the devices, e.g. photodetectors the devices having potential barriers, e.g. phototransistors
- H10F30/21—Individual radiation-sensitive semiconductor devices in which radiation controls the flow of current through the devices, e.g. photodetectors the devices having potential barriers, e.g. phototransistors the devices being sensitive to infrared, visible or ultraviolet radiation
- H10F30/22—Individual radiation-sensitive semiconductor devices in which radiation controls the flow of current through the devices, e.g. photodetectors the devices having potential barriers, e.g. phototransistors the devices being sensitive to infrared, visible or ultraviolet radiation the devices having only one potential barrier, e.g. photodiodes
- H10F30/221—Individual radiation-sensitive semiconductor devices in which radiation controls the flow of current through the devices, e.g. photodetectors the devices having potential barriers, e.g. phototransistors the devices being sensitive to infrared, visible or ultraviolet radiation the devices having only one potential barrier, e.g. photodiodes the potential barrier being a PN homojunction
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F71/00—Manufacture or treatment of devices covered by this subclass
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F77/00—Constructional details of devices covered by this subclass
- H10F77/20—Electrodes
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10F77/00—Constructional details of devices covered by this subclass
- H10F77/20—Electrodes
- H10F77/206—Electrodes for devices having potential barriers
Definitions
- the present invention relates to a light receiving element and a manufacturing method thereof.
- Patent Document 1 The prior art described in the following Patent Document 1 is a pn junction formed between electrodes in order to make it possible to easily create a light receiving element having sensitivity to light of a specific wavelength without selecting a material.
- a light receiving part having sensitivity to the wavelength of the irradiated light is obtained by applying a forward bias voltage to the semiconductor layer having the pn junction and irradiating the light.
- the band gap energy of the light-receiving portion is required to be smaller than the light energy of the long-wavelength light received, Since it is inversely proportional to the wavelength, the material of the light receiving part must be limited.
- a semiconductor material having a small bandgap such as Hg 1-X Cd X Te, InSb, or a multiple quantum well layer is used for a light receiving unit for long wavelength light. Instability of materials, difficulty of device processes, complexity of manufacturing processes, and the like are problems.
- the light receiving element obtained by a new photoexcitation system using near-field light as in the prior art described above solves the above-mentioned problems associated with the selection of materials constrained by the band gap, and anneals.
- a light receiving portion having sensitivity to an arbitrary wavelength can be obtained by light of a specific wavelength irradiated during processing.
- one of the electrodes sandwiching the pn junction must be a light transmissive electrode, such as ITO. Since a transparent electrode cannot transmit mid-infrared light having a wavelength of 2.5 ⁇ m or more, a light-receiving element having sensitivity to long-wavelength light such as mid-infrared light cannot be obtained.
- the present invention is an example of a problem to deal with such a problem. That is, it is an object of the present invention to solve various problems associated with material selection constrained by the band gap and to easily obtain a light receiving element having sensitivity to long wavelength light such as mid-infrared light. .
- the present invention includes at least the following configuration.
- the electrode on the side irradiated with the light of the pair of electrodes is configured by a wire grid polarizer that transmits light of the specific wavelength.
- an electrode that transmits mid-infrared or infrared can be obtained, so by applying a forward bias voltage between a pair of electrodes and irradiating with mid-infrared or infrared, Near-field light can be generated in the vicinity of the pn junction, and a light-receiving element having sensitivity to long-wavelength light such as infrared rays can be easily obtained.
- FIG. 1 is an explanatory view illustrating a light receiving element according to an embodiment of the present invention.
- the light receiving element 1 includes a semiconductor layer 10 having a pn junction 10j and a pair of electrodes 11 and 12 sandwiching the pn junction 10j.
- the semiconductor layer 10 can be constituted by, for example, a p layer (p-type semiconductor layer) 10p and an n layer (n-type semiconductor layer) 10n. In this case, a pn junction portion is located near the boundary between the p layer 10p and the n layer 10n. 10j is formed.
- the semiconductor layer 10 may be formed by stacking a large number of layers or formed on a substrate (not shown).
- the p layer can be, for example, a p-type Si layer obtained by doping Si (silicon) with a first material.
- the first substance here include a substance selected from group 13 elements (B (boron), Al (aluminum), and Ga (gallium)).
- the n layer may be an n-type Si layer obtained by doping Si (silicon) with a second substance.
- the second substance here include a substance selected from group 15 elements (As (arsenic), P (phosphorus), Sb (antimony)).
- At least one of the electrodes 11 and 12 is constituted by a wire grid polarizer Wg.
- the wire grid polarizer Wg can transmit light of a specific wavelength irradiated to the pn junction 10j when an annealing process described later is performed, and is a conductive material that becomes the electrode 11 on the side irradiated with light. It is what has.
- the electrode 12 on the side not irradiated with light can be composed of a metal electrode layer or the like. When light is irradiated from both sides of the pn junction 10j, both the electrodes 11 and 12 are constituted by the wire grid polarizer Wg.
- the light receiving element 1 is one in which near-field light (dressed photons) is generated in the vicinity of the pn junction 10j by annealing. As shown in FIG. 1, the annealing process applies a forward bias voltage V to the pn junction 10j through the electrodes 11 and 12, and irradiates light L having a specific wavelength, thereby the pn junction 10j. In addition, a light receiving portion having sensitivity to a specific wavelength of the irradiated light is formed.
- the particularly large generation site of this Joule heat is the surface of the pn junction 10j, the n layer 10n, and the p layer 10p that generate a large potential difference.
- the fluidity in the vicinity of the pn junction 10j is caused by the generation of Joule heat.
- the surface shape near the pn junction 10j and the dopant distribution change randomly, and near-field light is generated based on the irradiated light.
- the state in the vicinity of the pn junction 10j that generates such near-field light can be expanded by continuing the annealing process, and can be fixed by further reducing Joule heat.
- the light receiving element 1 formed by performing such an annealing process receives light of a specific wavelength irradiated during the annealing process, a state in which near-field light is suitably generated with respect to that wavelength has already been created. As a result, near-field light is generated in many regions. Then, the light received by the generated near-field light is excited in multiple stages through the vibration level, and finally the electrons are excited to the conduction band, so that the light receiving element having sensitivity to light of a specific wavelength The function as is obtained.
- FIG. 2 is an explanatory diagram showing a planar structure of a wire grid polarizer that functions as a light transmissive electrode formed on the side irradiated with light of a specific wavelength.
- the wire grid polarizer Wg can be made of a conductive metal such as Al, Zn, Ti, Ag, Au, and the vertical line pattern P1 having a width W, a distance d, and a pitch p and all vertical lines.
- a horizontal linear pattern P2 is provided to connect the patterns to the same potential.
- the pitch p of the wire grid polarizer Wg has a relationship of p ⁇ ⁇ min / 2, where ⁇ min is the minimum value of the transmitted light wavelength. Therefore, when the specific wavelength described above is an infrared ray of 5 ⁇ m or more, the pitch p ⁇ 2.5 ⁇ m is set. Further, the interval d and the width W of the wire grid polarizer Wg are parameters that affect the current density distribution in the vicinity of the pn junction 10j. In order to ensure the uniformity of the current density distribution in the pn junction 10j when the thickness of the p layer is set to about 1 ⁇ m, it is preferable that d ⁇ 2 ⁇ m.
- a configuration example of the wire grid polarizer Wg is shown below.
- a Ni—Cr antireflection film was provided on both sides of a 0.5 mm thick silicon wafer, and an Au wire grid having a height (depth) of 100 nm was formed on one side.
- the pitch p of the wire grid was 0.56 ⁇ m with respect to the design wavelength of 3 to 6 ⁇ m of transmitted light, and the line width W of the wire grid was 60% of the pitch p.
- the second example is the same as the first example except that the pitch p of the wire grid is 0.84 ⁇ m with respect to the vicinity of the design wavelength of transmitted light of 10 ⁇ m.
- the transmittance of S-polarized light (polarized component perpendicular to the grid direction) in the design wavelength range of each transmitted light is 70% or more, and Ni— Since Cr has conductivity, it functions as the electrode 11 for performing the above-described annealing treatment.
- the light receiving element 1 uses the wire 11 as the wire grid polarizer Wg so that the forward bias voltage V is applied between the electrodes 11 and 12 and the pn junction 10j between the electrodes 11 and 12 has a thickness of 3 ⁇ m.
- the forward bias voltage V is applied between the electrodes 11 and 12 and the pn junction 10j between the electrodes 11 and 12 has a thickness of 3 ⁇ m.
- the light receiving element 1 formed in this way is incident on the light receiving portion formed in the vicinity of the pn junction portion 10j through the light receiving surface by using the side on which the wire grid polarizer Wg is formed as the light receiving surface.
- a long-wavelength mid-infrared having a wavelength of 3 ⁇ m or more can be detected as an electromotive force change between the electrodes 11 and 12.
- an appropriate reverse bias voltage may be applied between the electrodes 11 and 12.
- the light receiving element 1 eliminates the need to select a material constrained by the band gap when obtaining a light receiving element having sensitivity to long wavelength light such as infrared rays.
- Various problems such as adverse effects, instability of materials, difficulty of device processes, and complexity of manufacturing processes can be solved.
Landscapes
- Light Receiving Elements (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
Abstract
Description
10p:p層,10n:n層,10j:pn接合部,
11,12:電極,
Wg:ワイヤーグリッド偏光子
Claims (3)
- pn接合部を有する半導体層と、前記pn接合部を挟む一対の電極とを備え、前記一対の電極間に順方向バイアス電圧を印加すると共に特定波長の光を照射することで前記pn接合部付近に近接場光を発生させた受光素子であって、
前記一対の電極の前記光が照射される側の電極を、前記特定波長の光が透過するワイヤーグリッド偏光子によって構成したことを特徴とする受光素子。 - 前記特定波長の光は、波長3μm以上の中赤外線であることを特徴とする請求項1記載の受光素子。
- pn接合部を有する半導体層に前記pn接合部を挟むように電極を形成し、
前記電極の少なくとも一方を特定波長の光が透過するワイヤーグリッド偏光子で形成し、
前記電極間に順方向バイアス電圧を印加すると共に前記ワイヤーグリッド偏光子を介して前記特定波長の光を照射することで、前記pn接合部付近に近接場光を発生させることを特徴とする受光素子の製造方法。
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201480028902.4A CN105393366A (zh) | 2013-06-26 | 2014-04-23 | 受光元件及其制造方法 |
| US14/899,179 US20160149070A1 (en) | 2013-06-26 | 2014-04-23 | Light-receiving element and production method therefor |
| KR1020157031839A KR20160024356A (ko) | 2013-06-26 | 2014-04-23 | 수광 소자 및 그 제조 방법 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-134373 | 2013-06-26 | ||
| JP2013134373A JP2015012047A (ja) | 2013-06-26 | 2013-06-26 | 受光素子及びその製造方法 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2014208186A1 true WO2014208186A1 (ja) | 2014-12-31 |
Family
ID=52141540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2014/061383 Ceased WO2014208186A1 (ja) | 2013-06-26 | 2014-04-23 | 受光素子及びその製造方法 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20160149070A1 (ja) |
| JP (1) | JP2015012047A (ja) |
| KR (1) | KR20160024356A (ja) |
| CN (1) | CN105393366A (ja) |
| TW (1) | TW201513322A (ja) |
| WO (1) | WO2014208186A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020065736A1 (ja) * | 2018-09-25 | 2020-04-02 | 特定非営利活動法人ナノフォトニクス工学推進機構 | 発光デバイスの製造方法 |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7204611B2 (ja) * | 2019-08-05 | 2023-01-16 | デクセリアルズ株式会社 | 偏光板およびその製造方法 |
| DE112022000622T5 (de) | 2021-01-12 | 2023-11-09 | Nichia Corporation | Halbleiterelement und verfahren zur herstellung eines halbleiterelements |
| JP2023137909A (ja) | 2022-03-18 | 2023-09-29 | 日亜化学工業株式会社 | センサ素子及びその製造方法 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012169565A (ja) * | 2011-02-16 | 2012-09-06 | Optoelectronics Industry And Technology Development Association | 受光素子の作製方法 |
| JP2013068898A (ja) * | 2011-09-26 | 2013-04-18 | Toshiba Corp | 光透過型金属電極、電子装置及び光学素子 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010271049A (ja) * | 2009-05-19 | 2010-12-02 | Sony Corp | 2次元固体撮像装置 |
| EP2677281B1 (de) * | 2012-06-22 | 2014-08-06 | SICK STEGMANN GmbH | Optoelektronisches Sensorelement |
| JP2014096684A (ja) * | 2012-11-08 | 2014-05-22 | V Technology Co Ltd | 光インターコネクション装置 |
-
2013
- 2013-06-26 JP JP2013134373A patent/JP2015012047A/ja active Pending
-
2014
- 2014-04-23 KR KR1020157031839A patent/KR20160024356A/ko not_active Withdrawn
- 2014-04-23 WO PCT/JP2014/061383 patent/WO2014208186A1/ja not_active Ceased
- 2014-04-23 CN CN201480028902.4A patent/CN105393366A/zh active Pending
- 2014-04-23 US US14/899,179 patent/US20160149070A1/en not_active Abandoned
- 2014-06-20 TW TW103121417A patent/TW201513322A/zh unknown
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012169565A (ja) * | 2011-02-16 | 2012-09-06 | Optoelectronics Industry And Technology Development Association | 受光素子の作製方法 |
| JP2013068898A (ja) * | 2011-09-26 | 2013-04-18 | Toshiba Corp | 光透過型金属電極、電子装置及び光学素子 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020065736A1 (ja) * | 2018-09-25 | 2020-04-02 | 特定非営利活動法人ナノフォトニクス工学推進機構 | 発光デバイスの製造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20160024356A (ko) | 2016-03-04 |
| TW201513322A (zh) | 2015-04-01 |
| CN105393366A (zh) | 2016-03-09 |
| JP2015012047A (ja) | 2015-01-19 |
| US20160149070A1 (en) | 2016-05-26 |
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