公开(公告)号：US20230318261A1

公开(公告)日：2023-10-05

申请号：US18204903

申请日：2023-06-01

Applicant: PRESIDENT AND FELLOWS OF HARVARD COLLEGE

Inventor： Michele TAMAGNONE ,  Marco PICCARDO ,  Dmitry KAZAKOV ,  Christina Maria SPÄGELE ,  Federico CAPASSO

IPC: H01S5/14 ,  B82Y20/00 ,  H01S5/0687 ,  G02B26/08 ,  G02B1/00 ,  H01S5/028

CPC classification number: H01S5/141 ,  B82Y20/00 ,  H01S5/0687 ,  G02B26/0816 ,  G02B1/005 ,  H01S5/0283

Abstract: A laser device includes a gain medium including a facet. The laser device includes a metasurface including a plurality of supercells. The metasurface is disposed on a substrate and configured to reflect and focus a first portion of light from the facet back to the gain medium as a feedback beam. The metasurface can be configured to reflect a second portion of the light as an output beam at an angle that is nonzero relative to a direction of the feedback beam. The metasurface can be configured to transmit a second portion of the light as an output beam through the metasurface away from the facet. The emission wavelength of the laser device can be tuned by translating the metasurface. The output beam can be collimated towards a fixed direction while tuning the wavelength.

公开(公告)号：US20230324612A1

公开(公告)日：2023-10-12

申请号：US18013539

申请日：2021-07-01

Applicant: PRESIDENT AND FELLOWS OF HARVARD COLLEGE

Inventor： Vincent GINIS ,  Marco PICCARDO ,  Michele TAMAGNONE ,  Federico CAPASSO

IPC: G02B6/14

CPC classification number: G02B6/14

Abstract: 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.

公开(公告)号：US20200335947A1

公开(公告)日：2020-10-22

申请号：US16956294

申请日：2018-12-20

Applicant: PRESIDENT AND FELLOWS OF HARVARD COLLEGE

Inventor： Marco PICCARDO ,  Dmitry KAZAKOV ,  Federico CAPASSO ,  Paul CHEVALIER

IPC: H01S5/34 ,  H01S5/065 ,  H01S5/30

Abstract: A wireless communication device includes a quantum cascade laser (QCL) configured to generate a terahertz (THz) or microwave carrier signal. The QCL includes a laser waveguide, a laser optical gain medium incorporated in the laser waveguide, and at least one electrode. An antenna may be integrated with the electrode. The device may be a transmitter, the electrode configured to receive an input baseband signal, the QCL configured to couple the THz or microwave carrier signal and the input baseband signal into a THz or microwave communication signal, and the antenna configured to transmit the THz or microwave communication signal. The device may be a receiver, the antenna configured to receive a THz or microwave communication signal, and the QCL configured to de-couple the THz or microwave communication signal from the THz or microwave carrier signal into an output baseband signal.

公开(公告)号：US20230258867A1

公开(公告)日：2023-08-17

申请号：US18110305

申请日：2023-02-15

Applicant: PRESIDENT AND FELLOWS OF HARVARD COLLEGE

Inventor： Vincent Ginis ,  Ileana-Cristina BENEA-CHELMUS ,  Jinsheng LU ,  Marco PICCARDO ,  Federico CAPASSO

IPC: G02B6/14

CPC classification number: G02B6/14 ,  G02B2006/12107

Abstract: 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 orthogonal modes of a wave. The wave, when sent from outside the region and when propagating from the first mode converter towards the second mode converter, can include a first mode of the plurality of orthogonal modes. The second mode converter can convert the wave from the first mode of the plurality of orthogonal modes, to a second mode of the plurality of orthogonal modes that is different from the first mode. The first mode converter can convert the wave to the first mode of the plurality of orthogonal modes.

公开(公告)号：US20230208104A1

公开(公告)日：2023-06-29

申请号：US17923886

申请日：2021-05-07

Applicant: PRESIDENT AND FELLOWS OF HARVARD COLLEGE

Inventor： Michele TAMAGNONE ,  Marco PICCARDO ,  Dmitry KAZAKOV ,  Christina Maria SPÄGELE ,  Federico CAPASSO

IPC: H01S5/14 ,  H01S5/028 ,  H01S5/0687 ,  G02B1/00 ,  G02B26/08 ,  B82Y20/00

CPC classification number: H01S5/141 ,  H01S5/0283 ,  H01S5/0687 ,  G02B1/005 ,  G02B26/0816 ,  B82Y20/00

Abstract: A laser device includes a gain medium including a facet. The laser device includes a metasurface including a plurality of supercells. The metasurface is disposed on a substrate and configured to reflect and focus a first portion of light from the facet back to the gain medium as a feedback beam. The metasurface can be configured to reflect a second portion of the light as an output beam at an angle that is nonzero relative to a direction of the feedback beam. The metasurface can be configured to transmit a second portion of the light as an output beam through the metasurface away from the facet. The emission wavelength of the laser device can be tuned by translating the metasurface. The output beam can be collimated towards a fixed direction while tuning the wavelength.