公开(公告)号：DE69703595D1

公开(公告)日：2001-01-04

申请号：DE69703595

申请日：1997-03-12

Applicant: LUCENT TECHNOLOGIES INC

Inventor： SIRTORI CARLO ,  SIVCO DEBORAH LEE ,  CAPASSO FEDERICO ,  FAIST JEROME ,  CHO ALFRED YI ,  HUTCHINSON ALBERT LEE

IPC: H01S5/00 ,  H01S5/34

Abstract: The disclosed improved quantum cascade (QC) laser comprises features that facilitate lasing at temperatures above 260K, preferably above 300K. Among the features is a wavefunction-increasing feature that enhances the amplitude of the lasing level wavefunction (3) in the adjacent upstream barrier layer, thereby increasing carrier injection efficiency into the lasing level. Exemplarily, the wavefunction-increasing feature is an approximately disposed thin quantum well (15). Among the features typically is also a chirped superlattice in the injection/relaxation region (12) that acts as a Bragg reflector to suppress escape of carriers from the lasing level into the continuum, while facilitating carrier extraction from the ground (2) state into a miniband, with the energy width of the miniband decreasing over at least a portion of the thickness of the injection/relaxation region. An InP top cladding layer is also used to optimize heat dissipation.

公开(公告)号：DE69800148D1

公开(公告)日：2000-06-21

申请号：DE69800148

申请日：1998-03-17

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CAPASSO FEDERICO ,  YI CHO ALFRED ,  FAIST JEROME ,  HUTCHINSON ALBERT LEE ,  SIRTORI CARLO ,  SIVCO DEBORAH LEE

IPC: H01S5/00 ,  H01S5/042 ,  H01S5/062 ,  H01S5/0625 ,  H01S5/34 ,  H01S5/343 ,  H01S5/30

Abstract: In a novel tunable semiconductor intersubband laser (111), the lasing transition (41) is a non-resonant tunneling transition, with the frequency of the emitted photon depending on the electrical bias across the multi-period active region (12) of the laser. The laser can be designed to emit in the mid-IR, and can advantageously be used for, e.g., trace gas sensing.

公开(公告)号：DE69700103T2

公开(公告)日：1999-07-15

申请号：DE69700103

申请日：1997-10-28

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CAPASSO FEDERICO ,  FAIST JEROME ,  CHO ALFRED YI ,  HUTCHINSON ALBERT LEE ,  SCAMARCIO GAETANO ,  SIRTORI CARLO ,  SIVCO DEBORAH LEE

IPC: H01S5/00 ,  H01S5/34 ,  H01S5/343 ,  H01S3/18