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1. 发明申请

WO2021097140A1 WIDELY TUNABLE COMPACT TERAHERTZ GAS LASERS 审中-公开
公开(公告)号：WO2021097140A1
公开(公告)日：2021-05-20
申请号：PCT/US2020/060299
申请日：2020-11-12
申请人： PRESIDENT AND FELLOWS OF HARVARD COLLEGE , MASSACHUSETTS INSTITUTE OF TECHNOLOGY , THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE ARMY , EVERITT, Henry O.
发明人： CHEVALIER, Paul , AMIRZHAN, Arman , PICCARDO, Marco , WANG, Fan , JOHNSON, Steven , CAPASSO, Federico
IPC分类号： H01S3/0941 , H01S3/14 , H01S3/22 , H01S3/223 , H01S5/00
摘要： Disclosed is a laser system including a first laser and a second laser. The first laser includes a laser cavity, and a gas phase molecular gain medium disposed in the laser cavity, the gain medium having an absorption band. The second laser is a solid state laser configured to be continuously tunable, with respect to an emission wavelength of the second laser, over the absorption band of the gain medium, and the second laser is tuned to pump rotational vibrational transitions in the gain medium to achieve a rotational population inversion.

2. 发明申请

WO2022051021A2 ELECTROMAGNETIC WAVEGUIDES USING CASCADED MODE CONVERSION 审中-公开
公开(公告)号：WO2022051021A2
公开(公告)日：2022-03-10
申请号：PCT/US2021/040195
申请日：2021-07-01
申请人： PRESIDENT AND FELLOWS OF HARVARD COLLEGE
发明人： GINIS, Vincent , PICCARDO, Marco , TAMAGNONE, Michele , CAPASSO, Federico
IPC分类号： G02B6/14 , G02B6/122 , G02B6/26 , G02B6/27 , H01P1/16 , H04B10/2581 , G02B6/10
摘要： A device includes a first mode converter and a second mode converter that define a region between the first mode converter and the second mode converter. The region can contain a plurality of optical modes including at least three modes. The first mode converter and the second mode converter can generate a near-field via a conversion between the plurality of optical modes. The first mode converter can receive an input wave of a first mode and the second mode converter can generate an output wave of a second mode different from the first mode. The first mode converter and the second mode converter can generate a confined near-field via a conversion between the plurality of optical modes.

3. 发明申请

WO2019103762A9 TOPOLOGY OPTIMIZED MULTI-LAYERED META-OPTICS 审中-公开
公开(公告)号：WO2019103762A9
公开(公告)日：2019-05-31
申请号：PCT/US2018/038357
申请日：2018-06-19
申请人： PRESIDENT AND FELLOWS OF HARVARD COLLEGE , PRINCETON UNIVERSITY
发明人： LIN, Zin , CAPASSO, Federico , RODRIGUEZ, Alejandro W. , LONCAR, Marko , GROEVER, Benedikt
IPC分类号： G02B1/00 , G02B27/00
摘要： A multi-layered lens comprises a plurality of metasurface layers. At least some layers of the plurality of metasurface layers include features that exhibit angular phase controls. The angular phases of the at least some layers cause an angular aberration correction or an angle convergence that focuses light onto a focal point regardless of angles of incidence.

4. 发明申请

WO2018222944A1 PLANAR ACHROMATIC AND DISPERSION-TAILORED META-SURFACES IN VISIBLE SPECTRUM 审中-公开
公开(公告)号：WO2018222944A1
公开(公告)日：2018-12-06
申请号：PCT/US2018/035502
申请日：2018-05-31
申请人： PRESIDENT AND FELLOWS OF HARVARD COLLEGE
发明人： CHEN, Wei Ting , SANJEEV, Vyshakh , ZHU, Alexander Yutong , KHORASANINEJAD, Mohammadreza , SHI, Zhujun , CAPASSO, Federico
IPC分类号： G08B5/18 , B82Y10/00 , B82Y35/00 , B82Y40/00 , H01F10/32 , H01Q15/02
摘要： An optical device comprises a metasurface including a plurality of nanostructures. The nanostructures define a phase profile and a group delay profile at a design wavelength. The phase profile and the group delay profile determine and control the functionalities and the chromatic dispersion of the metasurface.

5. 发明申请

WO2018118984A1 ULTRA-COMPACT, ABERRATION CORRECTED, VISIBLE CHIRAL SPECTROMETER WITH META-LENSES 审中-公开
公开(公告)号：WO2018118984A1
公开(公告)日：2018-06-28
申请号：PCT/US2017/067411
申请日：2017-12-19
申请人： PRESIDENT AND FELLOWS OF HARVARD COLLEGE
发明人： ZHU, Alexander. Yutong , CHEN, Wei Ting , KHORASANINEJAD, Mohammadreza , OH, Jaewon , ZAIDI, Aun , DEVLIN, Robert, Charles , CAPASSO, Federico
IPC分类号： G02B1/00 , G02B3/00 , G02B5/00 , G02B5/30 , G02B6/32 , G02B27/28
CPC分类号： G02B1/002 , G01J3/0208 , G01J3/0224 , G01J3/18 , G02B5/1809 , G02B5/1861 , G02B6/32
摘要： An optical device includes: (1) a substrate; and (2) multiple meta-lenses disposed on the substrate, each meta-lens of the meta-lenses including multiple nanofins disposed on a respective region of the substrate, the nanofins together specifying a phase profile of the meta-lens.

6. 发明申请

WO2018067246A3 ARBITRARY POLARIZATION-SWITCHABLE METASURFACES 审中-公开
公开(公告)号：WO2018067246A3
公开(公告)日：2018-04-12
申请号：PCT/US2017/048469
申请日：2017-08-24
申请人： PRESIDENT AND FELLOWS OF HARVARD COLLEGE
发明人： RUBIN, Noah A. , MUELLER, Jan Philipp Balthasar , CAPASSO, Federico
IPC分类号： G02B5/02 , G02B5/30
摘要： An optical component comprises a metasurface comprising nanoscale elements. The metasurface is configured to receive incident light and to generate optical outputs. The geometries and/or orientations of the nanoscale elements provide a first optical output upon receiving a polarized incident light with a first polarization, and provide a second optical output upon receiving a polarized incident light with a second polarization that is different from the first polarization.

7. 发明申请

WO2018009258A3 SUPER-DISPERSIVE OFF-AXIS META-LENSES FOR HIGH RESOLUTION COMPACT SPECTROSCOPY 审中-公开
公开(公告)号：WO2018009258A3
公开(公告)日：2018-01-11
申请号：PCT/US2017/026704
申请日：2017-04-07
申请人： PRESIDENT AND FELLOWS OF HARVARD COLLEGE
发明人： KHORASANINEJAD, Mohammadreza , CAPASSO, Federico , CHEN, Wei Ting , OH, Jaewon
IPC分类号： B82Y20/00 , G01J3/02
摘要： A meta-lens having a phase profile includes a substrate and a plurality of nanostructures disposed on the substrate. The nanostructures together define the phase profile of the meta-lens. The phase profile achieves an off-axis focus. Each nanostructure is designed according to at least one design parameter of the nanostructure that imparts a phase shift of light passing through the nanostructure.

8. 发明申请

WO2012021333A2 BROADBAND QUANTUM CASCADE LASER SOURCE 审中-公开
标题翻译：宽带量子CASCADE激光源
公开(公告)号：WO2012021333A2
公开(公告)日：2012-02-16
申请号：PCT/US2011/046265
申请日：2011-08-02
申请人： PRESIDENT AND FELLOWS OF HARVARD COLLEGE , CAPASSO, Federico , PFLUGL, Christian , DIEHL, Laurent , BLANCHARD, Romain
发明人： CAPASSO, Federico , PFLUGL, Christian , DIEHL, Laurent , BLANCHARD, Romain
IPC分类号： H01S5/40 , H01S5/34 , H01S3/02
CPC分类号： H01S5/125 , B82Y20/00 , H01S5/141 , H01S5/22 , H01S5/3402 , H01S5/4043 , H01S5/4087 , H01S5/50
摘要： A broadband quantum cascade laser (QCL) source includes one or more QCLs having an active region designed based on a diagonal laser transition. The QCL source may include multiple QCLs formed in an array or the QCL source may comprise a single QCL device. Although each QCL provides an emission spectrum comprising a small range of wavelengths at a given applied voltage, changes in the applied operating voltage result in changes in the emission spectrum of the QCL due to the Stark shift. When the QCL source comprises a plurality of QCLs formed in an array, at least some of the elements in the array may receive different applied operating voltages such that the combined output spectrum of the array is broader than that achievable by a single QCL. When the QCL source comprises a single QCL device, an applied operating voltage may be swept through a range of applied voltages such that that combined output spectrum over one sweep cycle is broader than the output spectrum of the QCL device when a static operating voltage is applied. Alternatively, the single QCL device may comprise multiple independent gain sections, wherein each of the independent gain sections is configured to operate at a different voltages to provide a broadband output spectrum.
摘要翻译：宽带量子级联激光器（QCL）源包括具有基于对角激光器转换设计的有源区域的一个或多个QCL。 QCL源可以包括在阵列中形成的多个QCL，或者QCL源可以包括单个QCL设备。虽然每个QCL提供了在给定的施加电压下包括小范围的波长的发射光谱，但是施加的工作电压的变化导致由于斯塔克位移引起的QCL的发射光谱的变化。当QCL源包括以阵列形成的多个QCL时，阵列中的至少一些元件可以接收不同的施加的工作电压，使得阵列的组合输出光谱比单个QCL可实现的更宽。当QCL源包括单个QCL器件时，所施加的工作电压可以扫过所施加的电压范围，使得当施加静态工作电压时，在一个扫描周期上的组合输出光谱宽于QCL器件的输出光谱。或者，单个QCL器件可以包括多个独立增益部分，其中每个独立增益部分被配置为在不同的电压下工作以提供宽带输出光谱。

9. 发明申请

WO2010059180A2 METHODS AND APPARATUS FOR SINGLE-MODE SELECTION IN QUANTUM CASCADE LASERS 审中-公开
标题翻译：用于量子级联激光器中的单模选择的方法和设备
公开(公告)号：WO2010059180A2
公开(公告)日：2010-05-27
申请号：PCT/US2009/005982
申请日：2009-11-05
申请人： PRESIDENT AND FELLOWS OF HARVARD COLLEGE , CAPASSO, Federico , LEE, Benjamin, G. , PFLUGL, Christian , DIEHL, Laurent , BELKIN, Mikhail, A.
发明人： CAPASSO, Federico , LEE, Benjamin, G. , PFLUGL, Christian , DIEHL, Laurent , BELKIN, Mikhail, A.
IPC分类号： H01S5/40 , H01S3/23 , H01S5/00
CPC分类号： H01S5/1228 , B82Y20/00 , H01S5/0014 , H01S5/0287 , H01S5/0654 , H01S5/1231 , H01S5/305 , H01S5/3211 , H01S5/3401
摘要： Methods and apparatus for improved single-mode selection in a quantum cascade laser. In one example, a distributed feedback grating incorporates both index-coupling and loss-coupling components. The loss-coupling component facilitates selection of one mode from two possible emission modes by periodically incorporating a thin layer of "lossy" semiconductor material on top of the active region to introduce a sufficiently large loss difference between the two modes. The lossy layer is doped to a level sufficient to induce considerable free-carrier absorption losses for one of the two modes while allowing sufficient gain for the other of the two modes. In alternative implementations, the highly-doped layer may be replaced by other low-dimensional structures such as quantum wells, quantum wires, and quantum dots with significant engineered intraband absorption to selectively increase the free-carrier absorption losses for one of multiple possible modes so as to facilitate single-mode operation.
摘要翻译：用于量子级联激光器中改进的单模选择的方法和装置在一个示例中，分布式反馈光栅结合了折射率耦合和损耗耦合两者。损失耦合组件有助于从两种可能的发射模式中选择一种模式，即周期性地将“有损耗” 半导体材料在有源区的顶部上，以在两种模式之间引入足够大的损耗差异。将有损耗层掺杂到足以为两种模式中的一种引起相当大的自由载流子吸收损失的水平，同时为两种模式中的另一种提供足够的增益。在替代实施方式中，高度掺杂的层可以被其他低维结构（例如量子阱，量子线和量子点）所取代，其具有显着的设计的带内吸收以选择性地增加多种可能模式之一的自由载流子吸收损耗以促进单模式操作。

10. 发明申请

WO2007022334A2 ACTIVE OPTICAL ANTENNA 审中-公开
标题翻译：主动光学天线
公开(公告)号：WO2007022334A2
公开(公告)日：2007-02-22
申请号：PCT/US2006/032086
申请日：2006-08-16
申请人： PRESIDENT AND FELLOWS OF HARVARD COLLEGE , CAPASSO, Federico , CROZIER, Ken , CUBUKCU, Ertugrul , KORT, Eric , YU, Nanfang , SMYTHE, Elizabeth
发明人： CAPASSO, Federico , CROZIER, Ken , CUBUKCU, Ertugrul , KORT, Eric , YU, Nanfang , SMYTHE, Elizabeth
IPC分类号： H01S5/00 , H04B10/00
CPC分类号： H01S3/06791 , B82Y20/00 , G01N21/648 , G01N21/658 , G01N21/7703 , G01N2021/0346 , G02B6/262 , H01S3/067 , H01S5/028 , H01S5/0286 , H01S5/22 , H01S5/3401 , H01S2301/18
摘要： A new class of photonic devices called active optical antennas, which consist of metallic structures directly integrated on to the facet of a semiconductor lasers, and of instruments based on such antennas are disclosed. The structures consist of metallic elements which function as antennas at optical wavelengths by spatially concentrating laser radiation of wavelength in the range from the UV to the mid-infrared into spots (with sizes in the range 10-100 nm) in the so called near field zone, that is at subwavelength distances from the facet. Various antenna designs are considered depending on the laser under consideration and applications. This invention has wide ranging applications such as new microscopes for high-resolution spatially resolved imaging and spectroscopy, new probes for biology, laser assisted processing and repair of devices, circuits and masks, as well new optical tweezers and phased array devices. Microscopes and other systems based on this invention are discussed. Further, a number of inventions relating to optical antennas and of instruments based on such antennas are disclosed. An important technology consisting of optical antennas fabricated at the ends of optical fibers is disclosed. A technique for imaging the field distributions on active optical antennas is disclosed. New designs of optical antennas are disclosed. Applications of optical antennas in microfluidic systems are disclosed.
摘要翻译：公开了一类称为有源光天线的新型光子器件，其由直接集成在半导体激光器的面上的金属结构和基于这种天线的仪器组成。这些结构由金属元素组成，它们通过在所谓的近场中将从UV到中红外范围内的波长的激光辐射空间聚集成点（尺寸在10-100nm），在光波长下用作天线。区域，即距离小面的亚波长距离。根据所考虑的激光和应用，考虑各种天线设计。本发明具有广泛的应用，例如用于高分辨率空间分辨成像和光谱的新显微镜，用于生物学的新探针，激光辅助处理和器件修复，电路和掩模，以及新的光学镊子和相控阵器件。讨论了基于本发明的显微镜和其它系统。此外，公开了与光天线和基于这样的天线的仪器有关的许多发明。公开了一种由在光纤端部制造的光天线组成的重要技术。公开了一种用于对有源光天线上的场分布进行成像的技术。公开了新的光学天线设计。公开了光学天线在微流体系统中的应用。

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