CUSIP No. 290846104

                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                  SCHEDULE 13D

                                (AMENDMENT NO. 2)

                    UNDER THE SECURITIES EXCHANGE ACT OF 1934
                                  EMCORE Corp.

                                (Name of Issuer)

                           Common Stock, no par value

                         (Title of Class of Securities)

                                    290846104

                                 (CUSIP Number)

                            Kathryn Klinedinst, Esq.
                Greenberg Glusker Fields Claman & Machtinger LLP
                      1900 Avenue of the Stars, Suite 2100
                              Los Angeles, CA 90067
                                 (310) 201-7576

   (Name, Address and Telephone Number of Person Authorized to Receive Notices
                               and Communications)

                                 October 1, 2007
             (Date of Event which Requires Filing of this Statement)

If the reporting person has previously filed a statement on Schedule 13G to
report the acquisition that is the subject of this Schedule 13D, and is filing
this schedule because of Sections 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g),
check the following box / /.

NOTE: Schedules filed in paper format shall include a signed original and five
copies of the schedule, including all exhibits. See Section 240.13d-7(b) for
other parties to whom copies are to be sent.

* The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).




CUSIP No. 290846104

--------------------------------------------------------------------------------
1.   Name of Reporting Persons.
     I.R.S. Identification Nos. of above persons (entities only).

     David Gelbaum, Trustee, The Quercus Trust
--------------------------------------------------------------------------------
2.   Check the Appropriate Box If a Member of a Group (See Instructions)
     (a)  [X]
     (b)  [_]
--------------------------------------------------------------------------------
3.   SEC Use Only

--------------------------------------------------------------------------------
4.   Source of Funds (See Instructions)
     PF
--------------------------------------------------------------------------------
5.   Check If Disclosure of Legal Proceedings Is Required Pursuant to
     Items 2(d) or 2(e)                                             [_]

--------------------------------------------------------------------------------
6.   Citizenship or Place of Organization
     U.S.
--------------------------------------------------------------------------------
               7.   Sole Voting Power
  NUMBER OF         -0-
   SHARES      -----------------------------------------------------------------
BENEFICIALLY   8.   Shared Voting Power
 OWNED BY           5,683,127
    EACH       -----------------------------------------------------------------
  REPORTING    9.   Sole Dispositive Power
   PERSON           -0-
    WITH       -----------------------------------------------------------------
               10.  Shared Dispositive Power
                    5,683,127
--------------------------------------------------------------------------------
11.  Aggregate Amount Beneficially Owned by Each Reporting Person
     5,683,127
--------------------------------------------------------------------------------
12.  Check Box If the Aggregate Amount in Row (11) Excludes Certain Shares
     (See Instructions)                                               [_]
--------------------------------------------------------------------------------
13.  Percent of Class Represented by Amount in Row (11)
     11.2%(1)
--------------------------------------------------------------------------------
14.  Type of Reporting Person (See Instructions)
     IN
--------------------------------------------------------------------------------

_____________
(1)   Based on 50,889,524 shares of Common Stock as reported in the Issuer's
      Quarterly Report on Form 10-Q for the quarter ended June 30, 2006.

                                       2

CUSIP No. 290846104

--------------------------------------------------------------------------------
1.   Name of Reporting Persons.
     I.R.S. Identification Nos. of above persons (entities only).

     Monica Chavez Gelbaum, Trustee, The Quercus Trust
--------------------------------------------------------------------------------
2.   Check the Appropriate Box If a Member of a Group (See Instructions)
     (a)  [X]
     (b)  [_]
--------------------------------------------------------------------------------
3.   SEC Use Only

--------------------------------------------------------------------------------
4.   Source of Funds (See Instructions)
     PF
--------------------------------------------------------------------------------
5.   Check If Disclosure of Legal Proceedings Is Required Pursuant to
     Items 2(d) or 2(e)                                             [_]

--------------------------------------------------------------------------------
6.   Citizenship or Place of Organization
     U.S.
--------------------------------------------------------------------------------
               7.   Sole Voting Power
  NUMBER OF         -0-
   SHARES      -----------------------------------------------------------------
BENEFICIALLY   8.   Shared Voting Power
 OWNED BY           5,683,127
    EACH       -----------------------------------------------------------------
  REPORTING    9.   Sole Dispositive Power
   PERSON           -0-
    WITH       -----------------------------------------------------------------
               10.  Shared Dispositive Power
                    5,683,127
--------------------------------------------------------------------------------
11.  Aggregate Amount Beneficially Owned by Each Reporting Person
     5,683,127
--------------------------------------------------------------------------------
12.  Check Box If the Aggregate Amount in Row (11) Excludes Certain Shares
     (See Instructions)                                               [_]
--------------------------------------------------------------------------------
13.  Percent of Class Represented by Amount in Row (11)
     11.2%(1)
--------------------------------------------------------------------------------
14.  Type of Reporting Person (See Instructions)
     IN
--------------------------------------------------------------------------------
_____________
(1)   Based on 50,889,524 shares of Common Stock as reported in the Issuer's
      Quarterly Report on Form 10-Q for the quarter ended June 30, 2006.


                                       3

CUSIP No. 290846104

--------------------------------------------------------------------------------
1.   Name of Reporting Persons.
     I.R.S. Identification Nos. of above persons (entities only).

     The Quercus Trust
--------------------------------------------------------------------------------
2.   Check the Appropriate Box If a Member of a Group (See Instructions)
     (a)  [X]
     (b)  [_]
--------------------------------------------------------------------------------
3.   SEC Use Only

--------------------------------------------------------------------------------
4.   Source of Funds (See Instructions)
     PF
--------------------------------------------------------------------------------
5.   Check If Disclosure of Legal Proceedings Is Required Pursuant to
     Items 2(d) or 2(e)                                             [_]

--------------------------------------------------------------------------------
6.   Citizenship or Place of Organization
     U.S.
--------------------------------------------------------------------------------
               7.   Sole Voting Power
  NUMBER OF         -0-
   SHARES      -----------------------------------------------------------------
BENEFICIALLY   8.   Shared Voting Power
 OWNED BY           5,683,127
    EACH       -----------------------------------------------------------------
  REPORTING    9.   Sole Dispositive Power
   PERSON           -0-
    WITH       -----------------------------------------------------------------
               10.  Shared Dispositive Power
                    5,683,127
--------------------------------------------------------------------------------
11.  Aggregate Amount Beneficially Owned by Each Reporting Person
     5,683,127
--------------------------------------------------------------------------------
12.  Check Box If the Aggregate Amount in Row (11) Excludes Certain Shares
     (See Instructions)                                               [_]
--------------------------------------------------------------------------------
13.  Percent of Class Represented by Amount in Row (11)
     11.2%(1)
--------------------------------------------------------------------------------
14.  Type of Reporting Person (See Instructions)
     OO
--------------------------------------------------------------------------------

_____________
(1)   Based on 50,889,524 shares of Common Stock as reported in the Issuer's
      Quarterly Report on Form 10-Q for the quarter ended June 30, 2006.


                                       4


CUSIP No. 290846104

Item 1.

         This Amendment No. 2 to Schedule 13D (this "Amendment No. 2") amends
and restates, where indicated, the statement on Schedule 13D relating to the
Common Stock of the Issuer filed by The Quercus Trust, David Gelbaum and Monica
Chavez Gelbaum (the "Reporting Persons") with the Securities and Exchange
Commission on August 3, 2007 (the "Initial Schedule 13D"), as amended by
Amendment No. 1 to Schedule 13D filed on August 24, 2007 (the "Amendment No.
1"). Capitalized terms used in this Amendment No. 2 but not otherwise defined
herein have the meanings given to them in the Initial Schedule 13D or prior
amendments thereto.

         This Amendment No. 2 is being made to disclose the acquisition of
additional shares of Common Stock of the Issuer. Except as otherwise set forth
herein, this Amendment No. 2 does not modify any of the information previously
reported by the reporting persons in the Initial Schedule 13D or prior
amendments thereto.

Item 5.  Interest in Securities of the Issuer

         (a) As of the date of this Amendment No. 2, each reporting person
beneficially owns 5,683,127 shares of Common Stock, which are held of record by
the Trust.

         (b) Each of David Gelbaum and Monica Chavez Gelbaum, acting alone, has
the power to exercise voting and investment control over the shares of Common
Stock owned by the Trust.

         (c) Since August 3, 2007, the Trust has purchased shares of Common
Stock in brokered transactions as follows:

          Date                    Number of Shares       Price Per Share
          ----                    ----------------       ---------------

         8/3/2007                     214,334                $  7.5381
         8/6/2007                       7,048                $  7.4190
         8/7/2007                      35,000                $  8.0240
        9/28/2007                     127,650                $  9.5882
        10/1/2007                     173,800                $ 10.0448
        10/2/2007                     198,550                $ 10.5088

         (d) Not applicable.

         (e) Not applicable.

Item 6. Contracts, Arrangements, Understandings or Relationships With Respect to
        Securities of the Issuer

         Pursuant to the Power of Attorney filed as Exhibit "B" to Amendment No.
1, David Gelbaum has been appointed as Monica Chavez Gelbaum's Attorney-In-Fact.

Item 7.  Material to Be Filed as Exhibits

         Exhibit A: Agreement Regarding Joint Filing of Amendment No. 2 to
Schedule 13D.


                                       5

CUSIP No. 290846104



SIGNATURE

         After reasonable inquiry and to the best of its knowledge and belief,
each of the undersigned certifies that the information set forth in this
statement is true, complete and correct and agrees that this statement may be
filed jointly with the other undersigned parties.


Dated: October 5, 2007            /s/ David Gelbaum
                                  ----------------------------------------------
                                  David Gelbaum, Co-Trustee of The Quercus Trust



                                  /s/ David Gelbaum, as Attorney-In-Fact for
                                  Monica Chavez Gelbaum
                                  ----------------------------------------------
                                  Monica Chavez Gelbaum, Co-Trustee of The
                                  Quercus Trust



                                  /s/ David Gelbaum
                                  ----------------------------------------------
                                  The Quercus Trust, David Gelbaum, Co-Trustee
                                  of The Quercus Trust






CUSIP No. 290846104


                                    EXHIBIT A

       AGREEMENT REGARDING JOINT FILING OF AMENDMENT NO. 2 TO SCHEDULE 13D



         The undersigned agree that the Amendment No. 2 to the Schedule 13D with
respect to the Common Stock of EMCORE Corp. is a joint filing being made on
their behalf.


Dated: October 5, 2007            /s/ David Gelbaum
                                  ----------------------------------------------
                                  David Gelbaum, Co-Trustee of The Quercus Trust



                                  /s/ David Gelbaum, as Attorney-In-Fact for
                                  Monica Chavez Gelbaum
                                  ----------------------------------------------
                                  Monica Chavez Gelbaum, Co-Trustee of The
                                  Quercus Trust



                                  /s/ David Gelbaum
                                  ----------------------------------------------
                                  The Quercus Trust, David Gelbaum, Co-Trustee
                                  of The Quercus Trust