EP1932038A1 - Wellenleiter-integrierte photodiode - Google Patents
Wellenleiter-integrierte photodiodeInfo
- Publication number
- EP1932038A1 EP1932038A1 EP06805309A EP06805309A EP1932038A1 EP 1932038 A1 EP1932038 A1 EP 1932038A1 EP 06805309 A EP06805309 A EP 06805309A EP 06805309 A EP06805309 A EP 06805309A EP 1932038 A1 EP1932038 A1 EP 1932038A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- waveguide
- photodiode
- contact layer
- layer
- length
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/12004—Combinations of two or more optical elements
-
- 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
- H10F77/40—Optical elements or arrangements
- H10F77/413—Optical elements or arrangements directly associated or integrated with the devices, e.g. back reflectors
Definitions
- the invention relates to a waveguide-integrated photodiode for high bandwidths with a semi-insulating single-mode feed waveguide, which is monolithically integrated with a photodiode mesa arranged above it on a substrate, wherein the photodiode mesa consists of an electrically conductive n-contact layer, an absorption layer, a p + contact layer and a metallic p-contact is constructed and the refractive index of the n-contact layer is greater than the refractive index of the semi-insulating waveguide layer.
- the quantum efficiency bandwidth product is a significant quality feature, which can only be achieved in the design of the waveguide-integrated photodiode considered here for frequencies above 40 GHz by compromising the design.
- This design compromise is particularly painful in advanced integrated designs of two-diode detectors (Balanced Detector), since a doubled capacitance is included in the RC bandwidth limitation due to the parallel connection of two photodiodes.
- a reduction of the effective pin capacitance of the waveguide-integrated, evanescently coupled photodiode can be achieved with constant thickness and width of the intrinsic absorber layer only by the horizontal shortening of the pin structure, however, a significant reduction in the
- the object of the invention is to provide a waveguide-integrated photodiode with minimized absorber length whose bandwidth can be increased in single photodiodes to over 100 GHz and their bandwidth at Balanced detectors to over 70 GHz, without the responsiveness to photodiodes with the highest limits reached so far significantly sinks.
- the capability for electrically insulating integration of the photodiode with other optical and electronic components is to be retained.
- n-contact layer with respect to the overlying layers (absorption layer and p-contact layer) in the direction of
- the extension L of the n-contact layer is approximately equal to the beat length of the two bottom-order light-guiding vertical modes in the multi-mode waveguide region minus the absorber length.
- the quantum efficiency is increased by working towards an improvement in the effective optical absorption over a given, already pre-minimized photodiode length (or area).
- the area of 5x20 ⁇ m 2 often mentioned in the literature can then be further reduced without the quantum efficiency decreasing proportionally with the absorber length.
- a short multimode waveguide between the monomode rib feed waveguide and the photodiode mesa consisting of
- Absorption layer and the p-contact layer integrated.
- the already existing n-contact layer was used, which was extended by a certain amount L relative to the photodiode mesa forward.
- the n-contact layer extended by the length L fulfills three tasks: a) the matching of the refractive indices between the waveguide 2 and the absorber layer, b) the low-resistance contacting of the active structure, and c) the task according to the invention controlling the optical intensity distribution in the active region Photodiode, in the sense of the most homogeneous possible illumination of the absorber.
- the invention is also applicable to all derived photodetector composite photodetector designs from single photodiodes, such as a) twin differential photodetectors b) balanced photodetectors c) serial or parallel optical traveling wave photodetectors
- the photodiode is epitaxially mounted on a semi-insulating InP substrate 1 and consists of a semi-insulating waveguide layer 2 and a photodiode mesa, consisting of an absorption layer 4 and a p-contact 5 based on InGaAs / InGaAsP.
- the absorption layer 4 of the photodiode mesas has a footprint of 5x7 ⁇ m 2 (width x length).
- the Thickness of the absorption layer 4 is on the order of 350 nm.
- the waveguide layer 2 is a ridge waveguide of 2 ⁇ m width.
- n-contact 3 Between the semi-insulating waveguide layer 2 and the absorption layer 4 there is a conductive n-contact 3 with a thickness of about 300 nm.
- the n-contact 3 is extended in the direction of the waveguide layer 2 by the length L and has a width of 6 .mu.m , It thus simultaneously forms an optically impedance-adapting layer in which the light is coupled out in the direction of the absorption layer 4 and guided in multiple modes.
- the length L is 7 microns in the example.
- the length L was varied, whereby the highest responsivity 0.51 A / W could be measured with a length L of 7 ⁇ m.
- the total length of 14 ⁇ m corresponds approximately to the beat length of the two vertical modes of lowest order in the multi-mode waveguide region of the n-contact layer 3 (13 ⁇ m).
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Light Receiving Elements (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102005045286A DE102005045286A1 (de) | 2005-09-22 | 2005-09-22 | Wellenleiter-integrierte Photodiode |
| PCT/DE2006/001655 WO2007033655A1 (de) | 2005-09-22 | 2006-09-18 | Wellenleiter-integrierte photodiode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1932038A1 true EP1932038A1 (de) | 2008-06-18 |
Family
ID=37686133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP06805309A Withdrawn EP1932038A1 (de) | 2005-09-22 | 2006-09-18 | Wellenleiter-integrierte photodiode |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US7868406B2 (de) |
| EP (1) | EP1932038A1 (de) |
| DE (1) | DE102005045286A1 (de) |
| WO (1) | WO2007033655A1 (de) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7676124B2 (en) | 2008-02-08 | 2010-03-09 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Monolithically integrated optoelectronic subassembly |
| DE102008008480B4 (de) | 2008-02-08 | 2012-01-19 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Monolithisch integrierte optoelektronische Baugruppe |
| US8861909B2 (en) * | 2011-02-17 | 2014-10-14 | Cornell University | Polysilicon photodetector, methods and applications |
| CN102723383B (zh) * | 2012-06-19 | 2016-01-06 | 电子科技大学 | 用于垂直方向耦合的光电探测器的光波导结构 |
| DE102015210343B4 (de) * | 2015-06-04 | 2018-05-03 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Halbleiterfotodiode und Verfahren |
| CN105842799B (zh) * | 2016-05-25 | 2018-01-16 | 电子科技大学 | 大横截面单模方向耦合光波导探测器 |
| US10935721B2 (en) | 2017-04-21 | 2021-03-02 | University Of Virginia Patent Foundation | Integrated photodiode with unique waveguide drift layer |
| CN117012846A (zh) * | 2022-04-27 | 2023-11-07 | 苏州旭创科技有限公司 | 光电探测器以及光芯片 |
| TWD232720S (zh) * | 2023-11-21 | 2024-08-01 | 台亞半導體股份有限公司 新竹市力行五路1號 (中華民國) | 光電二極體 |
| TWD234124S (zh) * | 2023-11-21 | 2024-10-11 | 台亞半導體股份有限公司 新竹市力行五路1號 (中華民國) | 光電二極體 |
| TWD233956S (zh) * | 2024-01-16 | 2024-10-01 | 台亞半導體股份有限公司 新竹市力行五路1號 (中華民國) | 光電二極體 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5127081A (en) * | 1990-08-03 | 1992-06-30 | At&T Bell Laboratories | Optical branching waveguide |
| FR2676126B1 (fr) * | 1991-04-30 | 1993-07-23 | France Telecom | Dispositif optoelectronique a guide optique et photodetecteur integres. |
| US5617234A (en) * | 1994-09-26 | 1997-04-01 | Nippon Telegraph & Telephone Corporation | Multiwavelength simultaneous monitoring circuit employing arrayed-waveguide grating |
| DE10044521C2 (de) | 2000-09-04 | 2002-08-01 | Hertz Inst Heinrich | Opto-elektronisch integrierter Photoempfänger |
| KR100390330B1 (ko) * | 2001-08-17 | 2003-07-04 | 한국전자통신연구원 | 광 스위칭 소자 |
| US7116851B2 (en) * | 2001-10-09 | 2006-10-03 | Infinera Corporation | Optical signal receiver, an associated photonic integrated circuit (RxPIC), and method improving performance |
-
2005
- 2005-09-22 DE DE102005045286A patent/DE102005045286A1/de not_active Ceased
-
2006
- 2006-09-18 WO PCT/DE2006/001655 patent/WO2007033655A1/de not_active Ceased
- 2006-09-18 EP EP06805309A patent/EP1932038A1/de not_active Withdrawn
-
2008
- 2008-03-21 US US12/052,891 patent/US7868406B2/en active Active
Non-Patent Citations (4)
| Title |
|---|
| BELING A ET AL: "Inp-based 1.55 /spl mu/m high-speed photodetectors for 80 Gbit/s systems and beyond", TRANSPARENT OPTICAL NETWORKS, 2005, PROCEEDINGS OF 2005 7TH INTERNATIO NAL CONFERENCE BARCELONA, CATLONIA, SPAIN JULY 3-7, 2005, PISCATAWAY, NJ, USA,IEEE, vol. 1, 3 July 2005 (2005-07-03), pages 303 - 308, XP010834406, ISBN: 978-0-7803-9236-6, DOI: 10.1109/ICTON.2005.1505811 * |
| MEKONNEN G G ET AL: "INP PHOTORECEIVER OEICS FOR HIGH-SPEED OPTICAL TRANSMISSION SYSTEMS", OPTOMECHATRONIC MICRO/NANO DEVICES AND COMPONENTS III : 8 - 10 OCTOBER 2007, LAUSANNE, SWITZERLAND; [PROCEEDINGS OF SPIE , ISSN 0277-786X], SPIE, BELLINGHAM, WASH, vol. 3950, 26 January 2000 (2000-01-26), pages 2 - 11, XP001026545, ISBN: 978-1-62841-730-2, DOI: 10.1117/12.382147 * |
| See also references of WO2007033655A1 * |
| UMBACH A ET AL: "Monolithic <E1>pin</E1>-HEMT 1.55 [micro]m photoreceiver on InP with 27 GHz bandwidth", ELECTRONICS LETTERS, IEE STEVENAGE, GB, vol. 32, no. 23, 7 November 1996 (1996-11-07), pages 2142 - 2143, XP006005928, ISSN: 0013-5194, DOI: 10.1049/EL:19961421 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US7868406B2 (en) | 2011-01-11 |
| WO2007033655A1 (de) | 2007-03-29 |
| DE102005045286A1 (de) | 2007-04-12 |
| US20090057796A1 (en) | 2009-03-05 |
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Legal Events
| Date | Code | Title | Description |
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Inventor name: BELING, ANDREAS Inventor name: BACH, HEINZ-GUNTER |
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